{"id":374,"date":"2026-06-05T17:27:41","date_gmt":"2026-06-05T09:27:41","guid":{"rendered":"https:\/\/larkdrop.cafe\/?p=374"},"modified":"2026-06-05T17:27:42","modified_gmt":"2026-06-05T09:27:42","slug":"sql%e7%b4%a2%e5%bc%95","status":"publish","type":"post","link":"https:\/\/larkdrop.cafe\/index.php\/2026\/06\/05\/sql%e7%b4%a2%e5%bc%95\/","title":{"rendered":"SQL\u7d22\u5f15"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u7d22\u5f15\u7684\u5f15\u5165<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7d22\u5f15\uff08Index\uff09\u662f\u6570\u636e\u5e93\u4e2d\u4e00\u79cd\u7279\u6b8a\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u7528\u4e8e\u63d0\u9ad8\u6570\u636e\u5e93\u67e5\u8be2\u7684\u6548\u7387\u548c\u901f\u5ea6\u3002\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u7d22\u5f15\u7c7b\u4f3c\u4e8e\u4e66\u7c4d\u4e2d\u7684\u76ee\u5f55\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u5173\u952e\u5b57\u5feb\u901f\u5b9a\u4f4d\u5230\u9700\u8981\u67e5\u770b\u7684\u5185\u5bb9\u6240\u5728\u7684\u4f4d\u7f6e\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-69-1024x715.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"715\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-69-1024x715.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-395\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\u5305\u62ec\u4e3b\u952e\u7d22\u5f15\u3001\u552f\u4e00\u7d22\u5f15\u3001\u666e\u901a\u7d22\u5f15\u7b49\u3002\u4e0d\u540c\u7684\u7d22\u5f15\u7c7b\u578b\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u67e5\u8be2\u573a\u666f\uff0c\u5f00\u53d1\u4eba\u5458\u9700\u8981\u6839\u636e\u5b9e\u9645\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7c7b\u578b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u65f6\uff0c\u5728MySQL\u4e2d\u6211\u4eec\u5982\u679c\u4f7f\u7528\u4e0d\u540c\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u6bd4\u5982\u5e38\u89c1\u7684MyISAM\uff0cInnoDB\u7b49\uff0c\u7d22\u5f15\u7684\u5b58\u50a8\u65b9\u5f0f\u4e5f\u4f1a\u6709\u6240\u4e0d\u540c<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b58\u50a8\u5f15\u64ce<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5148\u6765\u770b\u770bMySQL\u7684\u67b6\u6784<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-57-798x1024.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"798\" height=\"1024\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-57-798x1024.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-382\"  sizes=\"auto, (max-width: 798px) 100vw, 798px\" \/><\/div><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8fde\u63a5\u5668\uff1a\u8d1f\u8d23\u63a5\u6536\u5904\u7406\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\uff0c\u5efa\u7acb\u8fde\u63a5\uff0c\u7ba1\u7406\u8fde\u63a5\u7b49\u5de5\u4f5c<\/li>\n\n\n\n<li>\u67e5\u8be2\u89e3\u6790\u5668\uff1a\u5728\u8fd9\u4e00\u6b65MySQL\u4f1a\u5c06SQL\u8bed\u53e5\u89e3\u6790\u4e3a\u6811\uff0c\u6839\u636e\u8bed\u6cd5\u89c4\u5219\u5bf9\u8bed\u53e5\u8fdb\u884c\u9a8c\u8bc1\uff0c\u6bd4\u5982\u5173\u952e\u5b57\u662f\u5426\u6b63\u786e\uff0c\u5173\u952e\u5b57\u987a\u5e8f\u662f\u5426\u6b63\u786e\u7b49\u7b49<\/li>\n\n\n\n<li>\u67e5\u8be2\u4f18\u5316\u5668: \u4e00\u6761\u67e5\u8be2\u53ef\u4ee5\u6709\u5f88\u591a\u79cd\u6267\u884c\u65b9\u5f0f\uff0c\u6700\u7ec8\u8fd4\u56de\u76f8\u540c\u7684\u7ed3\u679c\uff0c\u4f18\u5316\u5668\u8d1f\u8d23\u5206\u6790\u67e5\u8be2\uff0c\u8bc4\u4f30\u5404\u79cd\u53ef\u80fd\u7684\u6267\u884c\u8def\u5f84\uff0c\u5e76\u9009\u62e9\u6700\u6709\u6548\u7684\u8def\u5f84\u6765\u6267\u884c\u8be5\u67e5\u8be2\u3002\u8fd9\u6d89\u53ca\u5230\u51b3\u7b56\u5982\u4f55\u8fde\u63a5\u8868\u3001\u9009\u62e9\u4f7f\u7528\u54ea\u4e9b\u7d22\u5f15\u3001\u51b3\u5b9a\u67e5\u8be2\u7684\u6267\u884c\u987a\u5e8f\u7b49\u3002<\/li>\n\n\n\n<li>\u6267\u884c\u5668\uff1a\u6267\u884c\u5668\u7684\u529f\u80fd\u662f\u6309\u7167\u4f18\u5316\u5668\u63d0\u4f9b\u7684\u6267\u884c\u8ba1\u5212\u6765\u6267\u884c\u67e5\u8be2\u3002\u5b83\u8d1f\u8d23\u5b9e\u9645\u4e0a\u7684\u6570 \u636e\u8bfb\u53d6\u3001\u8054\u63a5\u8868\u3001\u8fc7\u6ee4\u884c\u7b49\u64cd\u4f5c\u3002<\/li>\n\n\n\n<li>\u5b58\u50a8\u5f15\u64ce\uff1a\u6570\u636e\u5e93\u7cfb\u7edf\u4e2d\u8d1f\u8d23\u6570\u636e\u5b58\u50a8\u548c\u68c0\u7d22\uff0c\u5728MySQL\u4e2d\u6709\u591a\u79cd\u4e0d\u540c\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u6bcf\u4e2a\u5b58\u50a8\u5f15\u64ce\u90fd\u63d0\u4f9b\u4e86\u4e0d\u540c\u7684\u5b58\u50a8\u673a\u5236\u3001\u7d22\u5f15\u6280\u672f\u3001\u4ee5\u53ca\u52a0\u9501\u65b9\u5f0f\u7b49\u7b49\u529f\u80fd\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u6211\u4eec\u91cd\u70b9\u9700\u8981\u5173\u6ce8\u7684\u662f\u5b58\u50a8\u5f15\u64ce\uff0c\u5bf9\u4e8e\u7d22\u5f15\u800c\u8a00\uff0c\u4e0d\u540c\u7684\u5b58\u50a8\u5f15\u64ce\u5176\u7d22\u5f15\u7684\u5b9e\u73b0\u6709\u6240\u5dee\u5f02\uff0c\u6240\u4ee5\u6211\u4eec\u5728\u63d0\u53ca\u7d22\u5f15\u7684\u65f6\u5019\uff0c\u90fd\u4f1a\u5148\u8bf4\u660e\u6240\u4f7f\u7528\u7684\u5b58\u50a8\u5f15\u64ce\u3002MySQL\u4e2d\u63d0\u4f9b\u4e86\u5f88\u591a\u7684\u5b58\u50a8\u5f15\u64ce\uff0c\u5e38\u89c1\u7684\u6709InnoDB\uff0cMyISAM\u7b49\uff0c\u4f46\u662f\u6700\u5e38\u89c1\u548c\u5e38\u7528\uff0c\u4ee5\u53caMySQL\u9ed8\u8ba4\u7684\u8fd8\u662fInnoDB\u5b58\u50a8\u5f15\u64ce\uff0c\u6240\u4ee5\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u4e3b\u8981<strong>\u57fa\u4e8eInnoDB\u5b58\u50a8\u5f15\u64ce<\/strong>\u6765\u8bb2\u89e3\u7d22\u5f15\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">MySQL\u6570\u636e\u7684\u5b58\u50a8(InnoDB)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u9645\u4e0a\u6211\u4eec\u5b58\u50a8\u5728MySQL\u4e2d\u7684\u6570\u636e\uff0c\u6700\u7ec8\u90fd\u662f\u5b58\u50a8\u5728\u78c1\u76d8\u4e2d\u7684\u3002\u56e0\u6b64\uff0c\u5f53\u6211\u4eec\u5bf9MySQL\u8fdb\u884c\u67e5\u8be2\u64cd\u4f5c\u7684\u65f6\u5019\uff0c\u4f1a\u9891\u7e41\u8bfb\u53d6\u78c1\u76d8\u6587\u4ef6\u5185\u5bb9\uff0c\u90a3\u4e48\u4e00\u6b21\u81f3\u5c11\u8bfb\u53d6\u78c1\u76d8\u4e2d\u7684\u591a\u5c11\u6570\u636e\u5230\u5185\u5b58\u5462\uff1f\u4e00\u6b21\u8bfb\u53d6\u81f3\u5c11\u4e00\u9875\u6570\u636e\uff0c16KB\u5927\u5c0f\u7684\u5185\u5bb9\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-51-1024x180.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"180\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-51-1024x180.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-376\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8eMySQL\u800c\u8a00\uff0c\u770b\u5230\u7684\u662f\u4e00\u9875\u4e00\u9875\u7684\u6570\u636e\u3002\u6bcf\u4e00\u9875\u4e2d\u5b58\u50a8\u7684\u662f\u4ec0\u4e48\u6570\u636e\u5462\uff1f\u6211\u4eec\u76ee\u524d\u53ea\u5173\u6ce8\u8868\u4e2d\u6570\u636e\uff0c\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u8ba4\u4e3a\u9875\u4e2d\u5b58\u50a8\u7684\u662f\u8868\u4e2d\u7684\u6570\u636e\u3002\u4f46\u662f\u8bf7\u6ce8\u610f\u4e00\u5f20\u8868\u4e2d\u7684\u6570\u636e\uff0c\u4ec5\u4e00\u4e2a\u9875\u4e2d\u5c31\u4e00\u5b9a\u80fd\u5b58\u7684\u4e0b\u5417\uff1f\u5f53\u7136\u4e0d\u662f\uff0c\u6240\u4ee5\u4e00\u5f20\u8868\u4e2d\u7684\u6570\u636e\uff0c\u53ef\u80fd\u5b58\u50a8\u5728\u591a\u4e2a\u4e0d\u540c\u7684\u9875\u4e2d\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-64-1024x618.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"618\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-64-1024x618.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-389\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u603b\u7ed3\u4e00\u4e0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9875\u662fMySQL(InnoDB)\u5b58\u50a8\u7ba1\u7406\u7684\u57fa\u672c\u5355\u4f4d<\/li>\n\n\n\n<li>\u4e00\u9875\u4e2d\u53ef\u4ee5\u5b58\u50a8\u591a\u6761\u6570\u636e<\/li>\n\n\n\n<li>\u4e00\u5f20\u8868\u4e2d\u7684\u6570\u636e\u53ef\u4ee5\u5b58\u50a8\u5728\u591a\u4e2a\u9875\u4e2d\u3002<\/li>\n\n\n\n<li>\u4e00\u5f20\u8868\u5bf9\u5e94\u7684\u591a\u4e2a\u6570\u636e\u9875\u4f1a\u7ec4\u6210\u4e00\u4e2a\u53cc\u5411\u94fe\u8868<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5173\u4e8e\u9875\u6211\u4eec\u8fd8\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u5728MySQL\u4e2d\u6709\u591a\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u9875\uff0c\u7528\u6765\u5b58\u50a8\u8868\u4e2d\u6570\u636e\u7684\u9875\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u6570\u636e\u9875\u3002\u5b58\u50a8\u7684\u95ee\u9898\u641e\u6e05\u695a\u4e86\uff0c\u90a3\u4e48\u968f\u4e4b\u800c\u6765\u7684\u53e6\u5916\u4e00\u4e2a\u95ee\u9898\u662f\uff0c<strong>\u4e00\u4e2a\u6570\u636e\u9875<\/strong>\u4e2d\u5b58\u50a8\u4e86\u591a\u6761\u884c\u6570\u636e\uff0c\u6211\u4eec\u5982\u4f55\u5feb\u901f\u5b9a\u4f4d\u5230\u5176\u4e2d\u7684\u67d0\u4e00\u6761\u76ee\u6807\u6570\u636e\u5462\uff1f\u5728MySQL\u7684\u5b9e\u73b0\u4e2d\uff0c\u5b83\u4e3b\u8981\u662f\u901a\u8fc7\u4e8c\u5206\u67e5\u627e\u6765\u5b9e\u73b0\u7684\u3002\u4f46\u662f\uff0c\u4e00\u5f20\u8868\u4e2d\u7684\u6570\u636e\u53ef\u80fd\u5b58\u5728\u4e8e\u4e0d\u540c\u7684\u6570\u636e\u9875\u4e2d\uff0c\u600e\u4e48\u5728\u4e00\u5f20\u8868\u5bf9\u5e94\u7684\u591a\u9875\u4e2d\u5feb\u901f\u67e5\u627e\u5230\u67d0\u4e00\u6761\u8bb0\u5f55\u5462\uff1f\u5176\u5b9e\u601d\u8def\u4e5f\u4e0d\u96be\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9996\u5148\u5b9a\u4f4d\u5230\u5b58\u50a8\u76ee\u6807\u6570\u636e\u7684\u6570\u636e\u9875<\/li>\n\n\n\n<li>\u5728\u8be5\u9875\u4e2d\u8fdb\u884c\u4e8c\u5206\u67e5\u627e(\u8fd9\u4e5f\u610f\u5473\u7740\uff0c\u4e00\u9875\u4e2d\u7684\u591a\u884c\u6570\u636e\u662f<strong>\u6709\u5e8f\u7684<\/strong>)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\uff0c\u5feb\u901f\u67e5\u627e\u5230\u8868\u4e2d\u7684\u4e00\u6761\u8bb0\u5f55\u7684\u95ee\u9898\uff0c\u5c31\u6f14\u53d8\u6210\u4e86\u5982\u4f55\u5feb\u901f\u5b9a\u4f4d\u5230\u76ee\u6807\u6570\u636e\u9875\u7684\u95ee\u9898\u4e86\u3002\u90a3\u4e48\u5982\u4f55\u5feb\u901f\u5b9a\u4f4d\u5230\u76ee\u6807\u6570\u636e\u9875\u5462\uff1f\u8fd9\u5c31\u662f\u7d22\u5f15\u8981\u89e3\u51b3\u7684\u95ee\u9898\u4e86\uff01<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">MySQL\u7d22\u5f15(InnoDB)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c31\u91cd\u70b9\u7814\u7a76\u4e0bInnoDB\u4e2d\u7684\u7d22\u5f15\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7d22\u5f15\u6570\u636e\u7ed3\u6784(InnoDB)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u5982\u6709\u5982\u4e0b\u7684\u4e00\u5f20\u8868\uff0c\u6211\u4eec\u4ee5\u4e3b\u952e\u5217id\u4e3a\u6761\u4ef6\uff0c\u67e5\u8be2\u76ee\u6807\u884c\u6570\u636e\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE `index_demo` (\n  `id` int NOT NULL,\n  `age` int DEFAULT NULL,\n  `name` varchar(10) DEFAULT NULL,\n  PRIMARY KEY (`id`)\n);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8bbe\u8be5\u8868\u4e2d\u5f53\u524d\u5b58\u50a8\u4e86\u5f88\u591a\u6570\u636e\uff0c\u591a\u5230\u6570\u636e\u9700\u8981\u591a\u4e2a\u6570\u636e\u9875\u6765\u5b58\u50a8\uff0c\u5e76\u4e14\u5728\u6570\u636e\u9875\u4e2d\u7684\u8bb0\u5f55\u4ee5id\u4e3b\u952e\u503c\u7684\u5927\u5c0f\u6392\u5e8f\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u81ea\u5df1\u6765\u601d\u8003\u4ee5\u4e0b\u8fd9\u4e2a\u95ee\u9898\u3002\u5982\u679c\u6267\u884c\u5982\u4e0b\u67e5\u8be2\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select * from index_demo where id = 5;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5982\u4f55\u5feb\u901f\u67e5\u627e\u5230\u8fd9\u6761\u8bb0\u5f55\u5462\uff1f\u5f88\u9057\u61be\uff0c\u76ee\u524d\u6211\u4eec\u53ea\u80fd\u904d\u5386\u8868\u7684\u6bcf\u4e00\u4e2a\u9875\uff0c\u5728\u6bcf\u4e00\u9875\u4e2d\u6839\u636eid\u4e3b\u952e\u503c\u8fdb\u884c\u4e8c\u5206\u67e5\u627e\u3002\u4f46\u662f\u5f88\u663e\u7136\uff0c\u56e0\u4e3a\u8981\u904d\u5386\u6570\u636e\u9875\uff0c\u90a3\u4e48\u67e5\u627e\u6548\u7387\u4e0d\u662f\u5f88\u7406\u60f3\uff0c\u80fd\u5426\u5b9e\u73b0\u5bf9\u4e8e\u6570\u636e\u9875\u7684\u4e8c\u5206\u67e5\u627e\uff0c\u5373\u5229\u7528\u4e8c\u5206\u67e5\u627e\u7684\u65b9\u5f0f\uff0c\u5feb\u901f\u786e\u5b9a\u76ee\u6807id\u503c\u6240\u5728\u7684\u6570\u636e\u9875\u5462\uff1f\u53ef\u4ee5\uff0c\u4f46\u662f\u4f1a\u9047\u5230\u4e24\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e00\u4e2a\u95ee\u9898\u662f\uff0c\u867d\u7136\u6bcf\u4e00\u9875\u5185\u7684\u6570\u636e\u6309\u7167\u4e3b\u952eid\u503c\u6709\u5e8f\u7684\uff0c\u4f46\u662f\u4e0d\u540c\u9875\u4e4b\u95f4\u8bb0\u5f55\u7684id\u4e3b\u952e\u503c\u53ef\u80fd\u5e76\u6ca1\u6709\u56fa\u5b9a\u7684\u5927\u5c0f\u987a\u5e8f\u3002\u6240\u4ee5\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u6dfb\u52a0\u4e00\u4e2a\u7ea6\u675f\uff0c\u8ba9\u4e0b\u4e00\u9875\u7684\u8bb0\u5f55\u7684id\u503c\u90fd\u4e0d\u5c0f\u4e8e\u4e0a\u4e00\u9875\u7684\u8bb0\u5f55id\u503c\uff0c\u8fd9\u6837\u4e00\u6765\uff0c\u9875\u4e0e\u9875\u4e4b\u95f4\u4e5f\u53d8\u5f97\u6709\u5e8f\u4e86\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u7528\u7c7b\u4f3c\u7684\u601d\u8def\u5bf9\u9875\u8fdb\u884c\u4e8c\u5206\u67e5\u627e\uff0c\u5982\u4f55\u5bf9\u9875\u8fdb\u884c\u4e8c\u5206\u67e5\u627e\u5462\uff1f\u5982\u56fe\uff0c\u5982\u679c\u6211\u4eec\u8bb0\u5f55\u6bcf\u4e2a\u6570\u636e\u9875\u4e2d\uff0cid\u7684\u6700\u5c0f\u503c\uff0c\u90a3\u4e48\u5728\u8fdb\u884c\u4e8c\u5206\u67e5\u627e\u7684\u65f6\u5019\u6211\u4eec\u53ef\u4ee5\u8fd9\u6837\u5224\u65ad\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u5f85\u67e5\u627e\u7684id\u503c\u5927\u4e8e\u5f53\u524d\u9875A\u4e2d\u7684\u7684\u6700\u5c0fid\u503c<\/li>\n\n\n\n<li>\u540c\u65f6\uff0c\u5f85\u67e5\u627e\u7684id\u503c\u5c0f\u4e8e\u4e0b\u4e00\u9875B\u7684\u6700\u5c0fid\u503c<\/li>\n\n\n\n<li>\u8fd9\u65f6\u5c31\u53ef\u4ee5\u786e\u5b9a\u5f85\u67e5\u627e\u7684id\u503c\u5bf9\u5e94\u7684\u6570\u636e\u5728\u5f53\u524d\u9875A\u4e2d<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-52.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"968\" height=\"434\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-52.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-377\"  sizes=\"auto, (max-width: 968px) 100vw, 968px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b2c\u4e8c\u4e2a\u95ee\u9898\u662f\uff0c\u56e0\u4e3a\u5728MySQL\u4e2d\u5206\u914d\u7ed9\u4e00\u5f20\u8868\u7684\u591a\u4e2a\u9875\u53ef\u80fd\u7269\u7406\u4e0a\u5e76\u4e0d\u8fde\u7eed\uff0c\u5b83\u4eec\u4ee5\u53cc\u5411\u94fe\u8868\u7684\u5f62\u5f0f\u4e32\u8054\u8d77\u6765\uff0c\u5982\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-50.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"968\" height=\"563\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-50.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-375\"  sizes=\"auto, (max-width: 968px) 100vw, 968px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u663e\u7136\u6211\u4eec\u65e0\u6cd5\u76f4\u63a5\u5728\u4e00\u4e2a\u53cc\u5411\u94fe\u8868\u4e0a\u5b9e\u73b0\u4e8c\u5206\u67e5\u627e\uff0c\u4f46\u662f\u5982\u4f55\u5b9e\u73b0\u4e8c\u5206\u67e5\u627e\u7684\u6548\u679c\u5462\uff1f\u8fd9\u4e5f\u96be\u4e0d\u5012\u6211\u4eec\uff0c\u6211\u4eec\u53ea\u9700\u8981\u5c06\u6240\u6709\u7684\u6570\u636e\u9875\u7684\u6700\u5c0f\u503c\uff0c\u96c6\u4e2d\u5230\u4e00\u4e2a\u6570\u636e\u9875\u4e2d\u5373\u53ef\uff0c\u6240\u4ee5\u6211\u4eec\u9700\u8981\u5b8c\u6210\u5982\u4e0b\u6b65\u9aa4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e3a\u6bcf\u4e00\u9875\u521b\u5efa\u4e00\u6761\u76ee\u5f55\u9879\u8bb0\u5f55\uff0c\u76ee\u5f55\u9879\u8bb0\u5f55\u4e2d\u53ea\u9700\u8981\u8bb0\u5f55\u6bcf\u4e00\u9875\u7684\u6700\u5c0fid\u503c\uff0c\u4ee5\u53ca\u8be5\u9875\u7684\u9875\u53f7<\/li>\n\n\n\n<li>\u5c06\u6bcf\u4e00\u9875\u5bf9\u5e94\u7684\u76ee\u5f55\u9879\u90fd\u5b58\u50a8\u5728\u4e00\u4e2a\u6570\u636e\u9875\u4e2d<\/li>\n\n\n\n<li>\u4fdd\u8bc1\u5b58\u50a8\u5728\u6570\u636e\u9875\u4e2d\u7684\u76ee\u5f55\u9879\u4e5f\u6309\u7167id\u503c\u6392\u5e8f<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-59-1024x499.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"499\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-59-1024x499.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-384\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u4e00\u6765\u6211\u4eec\u5728\u67e5\u627e\u7684\u65f6\u5019<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9996\u5148\u8bbf\u95ee\u76ee\u5f55\u9875\u4e2d\u7684\u76ee\u5f55\u9879\uff0c\u505a\u4e8c\u5206\u67e5\u627e<\/li>\n\n\n\n<li>\u5224\u65ad\u5982\u679c\u67d0\u4e2a\u76ee\u5f55\u9879\u7684id\u503c\u5c0f\u4e8e\u5f85\u67e5\u627e\u7684id\u503c\uff0c\u4e14\u5f85\u67e5\u627e\u7684id\u503c\u5c0f\u4e8e\u540e\u4e00\u4e2a\u76ee\u5f55\u9879\u7684id\u503c\uff0c\u6bd4\u5982 1 &lt; 5 &lt; 51<\/li>\n\n\n\n<li>\u90a3\u4e48\u5f85\u67e5\u627e\u7684id\u503c\u5c31\u5728\u8be5\u76ee\u5f55\u9879\u6240\u5728\u7684\u9875\u4e2d\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u73b0\u5728\u6570\u636e\u9875\u4e2d\u4e5f\u4f1a\u5b58\u653e\u76ee\u5f55\u9879\u8bb0\u5f55\u4e86\uff0c\u6240\u4ee5\u4e3a\u4e86\u597d\u533a\u5206\uff0c\u6211\u4eec\u79f0\u5b58\u50a8\u76ee\u5f55\u9879\u7684\u9875\u4e3a\u76ee\u5f55\u9875\uff0c\u79f0\u5b58\u50a8\u884c\u6570\u636e\u7684\u9875\u4e3a\u666e\u901a\u6570\u636e\u9875\u3002(\u8fd9\u79cd\u8bf4\u6cd5\u5e76\u975e\u5b98\u65b9\u8bf4\u6cd5)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\u8fd9\u6837\u5c31\u53ef\u4ee5\u4e86\u5417? \u5f53\u7136\u8fd8\u662f\u4e0d\u884c\uff0c\u56e0\u4e3a\u4e00\u5f20\u8868\u5305\u542b\u7684\u666e\u901a\u6570\u636e\u9875\u6570\u91cf\u53ef\u80fd\u5f88\u591a\uff0c\u591a\u5230\u4ec0\u4e48\u7a0b\u5ea6\u5462\uff1f\u591a\u5230\u4e00\u4e2a\u76ee\u5f55\u9875\u90fd\u653e\u4e0d\u4e0b\u666e\u901a\u6570\u636e\u9875\u5bf9\u5e94\u7684\u76ee\u5f55\u9879\u4e86\uff0c\u6b64\u65f6\uff0c\u6211\u4eec\u7684\u76ee\u5f55\u9879\u5c31\u9700\u8981\u5b58\u50a8\u5728\u591a\u4e2a\u76ee\u5f55\u9875\u4e2d\uff0c\u5e76\u4e14\u8fd9\u4e9b\u76ee\u5f55\u9875\u4e4b\u95f4\u7ee7\u7eed\u7528\u53cc\u5411\u94fe\u8868\u4e32\u8054\u8d77\u6765\u3002\u8fd9\u6837\u4e00\u6765\u5b58\u50a8\u76ee\u5f55\u9879\u7684\u95ee\u9898\u89e3\u51b3\u4e86\uff0c\u4f46\u662f\u8fd8\u80fd\u5bf9\u76ee\u5f55\u9875\u4e2d\u7684\u76ee\u5f55\u9879\u8bb0\u5f55\u505a\u4e8c\u5206\u67e5\u627e\u5417\uff1f\u8fd8\u662f\u4e0d\u884c\uff0c\u539f\u56e0\u6709\u4e24\u4e2a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u76ee\u5f55\u9875\u5185\u7684\u76ee\u5f55\u9879\u8bb0\u5f55\u6839\u636eid\u6709\u5e8f\uff0c\u4f46\u662f\u76ee\u5f55\u9875\u4e4b\u95f4\u65e0\u5e8f<\/li>\n\n\n\n<li>\u65e0\u6cd5\u76f4\u63a5\u5bf9\u94fe\u8868\u505a\u4e8c\u5206\u67e5\u627e<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-58-1024x484.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"484\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-58-1024x484.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-383\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u4e3a\u4e86\u5b9e\u73b0\u5bf9<strong>\u76ee\u5f55\u9875\u4e2d\u7684\u76ee\u5f55\u9879<\/strong>\u7684\u4e8c\u5206\u67e5\u627e\uff0c\u5148\u6765\u89e3\u51b3\u7b2c\u4e00\u4e2a\u95ee\u9898\u4fdd\u8bc1\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9996\u5148\u5df2\u77e5\u76ee\u5f55\u9875\u4e2d\u7684\u76ee\u5f55\u9879\u662f\u6709\u5e8f\u7684(\u6839\u636eid\u503c\u6709\u5e8f)<\/li>\n\n\n\n<li>\u5728\u6b64\u57fa\u7840\u4e0a\u5728\u65bd\u52a0\u7ea6\u675f\uff0c\u5373\u4e0a\u4e00\u4e2a\u76ee\u5f55\u9875\u7684\u76ee\u5f55\u9879id\u503c\uff0c\u5c0f\u4e8e\u4e0b\u4e00\u76ee\u5f55\u9875\u7684\u6240\u6709\u76ee\u5f55\u9879id\u503c<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-60-1024x484.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"484\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-60-1024x484.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-385\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u6b21\uff0c\u518d\u6765\u89e3\u51b3\u7b2c\u4e8c\u4e2a\u95ee\u9898\uff0c\u4e3a\u6bcf\u4e00\u4e2a<strong>\u76ee\u5f55\u9875<\/strong>\u521b\u5efa\u5bf9\u5e94\u7684\u76ee\u5f55\u9879\u8bb0\u5f55\uff0c\u5e76\u4fdd\u5b58\u5728\u6570\u636e\u9875\u4e2d\u5373\u53ef(\u5373\u666e\u901a\u6570\u636e\u9875\u7684\u76ee\u5f55\u9875\u7684\u76ee\u5f55\u9875)\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6bcf\u4e00\u4e2a<strong>\u76ee\u5f55\u9875<\/strong>\u5bf9\u5e94\u7684\u76ee\u5f55\u9879\u8bb0\u5f55\u4e2d\u53ea\u9700\u8981\u5b58\u50a8\u6bcf\u4e00\u76ee\u5f55\u9875\u7684\u6700\u5c0fid\u503c\uff0c\u4ee5\u53ca\u8be5\u76ee\u5f55\u9875\u7684\u9875\u53f7<\/li>\n\n\n\n<li>\u6bcf\u4e00\u4e2a<strong>\u76ee\u5f55\u9875<\/strong>\u5bf9\u5e94\u7684\u76ee\u5f55\u9879\u90fd\u5b58\u50a8\u5728\u4e00\u4e2a\u6570\u636e\u9875\u4e2d<\/li>\n\n\n\n<li>\u4fdd\u8bc1\u9875\u4e2d\u7684\u76ee\u5f55\u9879\u6309\u7167id\u503c\u6392\u5e8f\uff0c\u5982\u56fe\u6240\u793a<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u8fd9\u4e2a\u65b0\u7684\u6570\u636e\u5b58\u50a8\u7684\u662f<strong>\u76ee\u5f55\u9875\u5bf9\u5e94\u7684\u76ee\u5f55\u9879<\/strong>\uff0c\u6240\u4ee5\u6211\u4eec\u79f0\u8fd9\u4e2a\u6570\u636e\u9875\u4e3a<strong>\u76ee\u5f55\u9875\u7684\u76ee\u5f55\u9875(\u975e\u5b98\u65b9\u8bf4\u6cd5)<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-63-1024x655.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"655\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-63-1024x655.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-388\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u4e00\u6765\uff0c\u6211\u4eec\u5728\u67e5\u8be2\u7684\u65f6\u5019\uff0c\u5c31\u53ef\u4ee5\u6309\u7167\u5982\u4e0b\u6d41\u7a0b\u6765\u5b8c\u6210\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728<strong>\u76ee\u5f55\u9875\u5bf9\u5e94\u7684\u76ee\u5f55\u9875<\/strong>\u4e2d\u5feb\u901f\u5b9a\u4f4d\u5230\u67d0\u4e2a<strong>\u76ee\u5f55\u9875\u7684\u76ee\u5f55\u9879<\/strong>\uff0c\u5e76\u627e\u5230\u8be5\u76ee\u5f55\u9879\u5bf9\u5e94\u7684\u76ee\u5f55\u9875<\/li>\n\n\n\n<li>\u7136\u540e\u5728<strong>\u76ee\u5f55\u9875<\/strong>\u4e2d\u7ee7\u7eed\u4e8c\u5206\u67e5\u627e\uff0c\u5c31\u53ef\u4ee5\u627e\u5230\u76ee\u6807\u6570\u636e\u5bf9\u5e94\u7684<strong>\u76ee\u5f55\u9879<\/strong>\uff0c\u5e76\u627e\u5230\u76ee\u5f55\u9879\u5bf9\u5e94\u7684\u666e\u901a\u6570\u636e\u9875<\/li>\n\n\n\n<li>\u518d\u5728<strong>\u666e\u901a\u6570\u636e\u9875<\/strong>\u4e2d\u505a\u4e8c\u5206\u67e5\u627e\uff0c\u5c31\u53ef\u4ee5\u627e\u5230\u5bf9\u5e94\u7684\u76ee\u6807\u884c\u6570\u636e\u4e86<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\uff0c\u6709\u540c\u5b66\u53ef\u80fd\u8fd8\u4f1a\u6709\u7591\u60d1\uff0c\u90a3\u76ee\u5f55\u9875\u7684\u76ee\u5f55\u9879\u4e5f\u5f88\u591a\uff0c\u591a\u5230\u4e00\u4e2a\u6570\u636e\u9875\u653e\u4e0d\u4e0b\u5462\uff1f\u5176\u5b9e\u548c\u4e4b\u524d\u4e00\u6a21\u4e00\u6837\u7684\u601d\u8def\uff0c\u4f9d\u6b21\u7c7b\u63a8\u5373\u53ef\uff0c\u4e8e\u662f\u5c31\u5f62\u6210\u4e86\u5982\u4e0b\u7684\u7ed3\u6784\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-56-1024x376.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"376\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-56-1024x376.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-381\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e0d\u5c31\u662f\u4e00\u9897\u6811\u7684\u5f62\u72b6\u561b\uff0c\u66f4\u51c6\u786e\u7684\u6765\u8bf4\uff0c\u5176\u5b9e\u5b83\u5c31\u662f\u4e00\u9897B+\u6811\uff01\u8fd9\u6837\u7684\u4e00\u9897B+\u6811\uff0c\u5c31\u5bf9\u5e94\u7684\u4e00\u4e2a<strong>\u7d22\u5f15<\/strong>\uff0c\u901a\u8fc7\u5b83\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u5230\u76ee\u6807\u6570\u636e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728\u8fd9\u9897B+\u6811\u7d22\u5f15\u4e2d\uff0c\u6811\u4e2d\u8282\u70b9\u90fd\u662f\u9875(16kb)<\/li>\n\n\n\n<li>\u7528\u6765\u5b58\u50a8\u771f\u6b63\u7684\u8868\u4e2d\u6570\u636e\u7684\u6570\u636e\u9875\u6211\u4eec\u79f0\u5b83\u4eec\u4e3aB+\u6811\u4e2d\u7684\u53f6\u5b50\u8282\u70b9<\/li>\n\n\n\n<li>\u7528\u6765\u5b58\u50a8\u76ee\u5f55\u9879\u8bb0\u5f55\u7684\u8282\u70b9\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u975e\u53f6\u5b50\u8282\u70b9\uff0c\u6216\u8005\u5185\u8282\u70b9<\/li>\n\n\n\n<li>\u6240\u6709\u7684\u53f6\u5b50\u8282\u70b9\u90fd\u5728\u540c\u4e00\u5c42\uff0c\u4e14\u7ec4\u6210\u4e86\u4e00\u4e2a\u53cc\u5411\u94fe\u8868\uff0c\u6211\u4eec\u79f0\u8be5\u5c42\u4f4d\u7b2c0\u5c42<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u603b\u7ed3\u4e00\u4e0b\uff0c\u5728\u6570\u636e\u5e93\u8868\u4e2d\u67e5\u627e\u4e00\u6761\u8bb0\u5f55\u7684\u8fc7\u7a0b\uff0c\u5982\u679c\u6709\u7d22\u5f15\u7684\u8bdd\uff0c\u5176\u5b9e\u5c31\u8f6c\u5316\u6210\u4e86\u5728B+\u6811\u4ece\u6839\u8282\u70b9\uff0c\u5230\u53f6\u5b50\u8282\u70b9\u7684\u4e00\u6b21\u8bbf\u95ee\u8fc7\u7a0b\u3002\u4f46\u662f\uff0c\u56e0\u4e3a\u6bcf\u8bbf\u95eeB+\u6811\u4e2d\u7684\u4e00\u4e2a\u8282\u70b9\u90fd\u9700\u8981\u8fdb\u884c\u4e00\u6b21\u78c1\u76d8IO\uff0c\u6240\u4ee5B+\u6811\u7684\u9ad8\u5ea6\u5c31\u51b3\u5b9a\u4e86\u4ece\u6839\u5230\u53f6\u7684\u4e00\u6b21\u8bbf\u95ee\u8fc7\u7a0b\u4e2d\u6240\u8fdb\u884c\u7684IO\u6b21\u6570\uff0c\u4ece\u8fd9\u4e00\u70b9\u4e0a\u6765\u8bf4\uff0c\u4f7f\u7528B+\u6811\u4f5c\u4e3a\u7d22\u5f15\u4e5f\u662f\u5f88\u5408\u9002\u7684\uff0c\u76f8\u6bd4\u4e8e\u6211\u4eec\u975e\u5e38\u719f\u6089\u7684\u5e73\u8861\u4e8c\u53c9\u6811\uff0cB+\u6811\u4f5c\u4e3a\u4e00\u9897\u5e73\u8861\u591a\u53c9\u6811\uff0c\u5927\u5927\u964d\u4f4e\u4e86\u6811\u7684\u9ad8\u5ea6\uff0c\u4ece\u800c\u51cf\u5c11IO\u6b21\u6570\uff0c\u6240\u4ee5\u4e00\u822c\u6765\u8bf4MySQL\u4e2dB+\u6811\u7d22\u5f15\u7684\u9ad8\u5ea6\u4e0d\u4f1a\u8d85\u8fc74\u5c42\uff01<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u805a\u7c07\u7d22\u5f15(InnoDB)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u4e0a\u9762<strong>\u6839\u636e\u4e3b\u952e\u5217\u7684\u503c\u6240\u521b\u5efa\u7684\u90a3\u9897B+\u6811\uff0c\u5373\u4e3b\u952e\u5217\u7d22\u5f15\u5c31\u662f\u805a\u7c07\u7d22\u5f15<\/strong>\u3002\u5bf9\u4e8e\u6570\u636e\u5e93\u4e2d\u6211\u4eec\u5b9a\u4e49\u7684\u6240\u6709\u8868\uff0cMySQL\u90fd\u4f1a\u81ea\u52a8\u6839\u636e\u4e3b\u952e\u5217\u521b\u5efa\u4e00\u9897\u7684B+\u6811\u7d22\u5f15\uff0c\u5373\u805a\u7c07\u7d22\u5f15\uff0c\u805a\u7c07\u7d22\u5f15\u5177\u6709\u4e24\u4e2a\u975e\u5e38\u91cd\u8981\u7684\u7279\u5f81\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\uff0c\u7d22\u5f15\u5373\u6570\u636e\u3002\u5373\u805a\u7c07\u7d22\u5f15\u8fd9\u9897B+\u6811\uff0c\u5373\u662f\u4e00\u4e2a\u7d22\u5f15\uff0c\u800c\u4e14\u8fd8\u5305\u542b\u4e86\u8868\u4e2d\u6bcf\u4e00\u884c\u7684\u5b8c\u6574\u7684\u6570\u636e\uff0c\u8fd9\u91cc\u53ef\u4ee5\u548c\u6211\u4eec\u524d\u9762\u8bb2\u7684\u4e66\u548c\u76ee\u5f55\u7684\u4f8b\u5b50\u505a\u4e00\u4e2a\u7c7b\u6bd4\uff0c\u4e00\u672c\u4e66\u7684\u76ee\u5f55\u5e76\u672a\u5305\u542b\u4e66\u4e2d\u4efb\u4f55\u4e00\u9875\u7684\u5b8c\u6574\u5185\u5bb9\uff0c\u5b83\u53ea\u662f\u5e2e\u6211\u4eec\u5feb\u901f\u5b9a\u4f4d\u5230\u67d0\u4e00\u9875\u7684\u771f\u6b63\u5185\u5bb9\u3002\u5982\u679c\u628a\u4e66\u7684\u76ee\u5f55\u5f53\u505a\u7d22\u5f15\uff0c\u90a3\u4e48\u5b83\u5c31\u548c\u6211\u4eec\u7684\u805a\u7c07\u7d22\u5f15\u4e0d\u540c\u4e86\uff0c\u56e0\u4e3a\u805a\u7c07\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u4e2d(\u666e\u901a\u6570\u636e\u9875)\uff0c\u5c31\u5b58\u50a8\u4e86\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u5b8c\u6574\u6570\u636e\uff01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u6b21\uff0c\u7d22\u5f15\u4e2d\u7684\u6570\u636e\u90fd\u4ee5\u4e3b\u952e\u503c\u6392\u5e8f\uff0c\u8868\u73b0\u5728\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u666e\u901a\u6570\u636e\u9875\u548c\u76ee\u5f55\u9875\u5185\u5b58\u50a8\u7684\u6570\u636e\uff0c\u6309\u7167\u4e3b\u952e\u503c\u6392\u5e8f<\/li>\n\n\n\n<li>\u5982\u679c\u5206\u5c42\u6765\u770b\uff0c\u90a3\u4e48\u6bcf\u4e00\u5c42\u7684\u6570\u636e\u9875\uff0c\u90fd\u6309\u7167id\u503c\u6709\u5e8f<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd8\u6709\u540c\u5b66\u53ef\u80fd\u4f1a\u6709\u7591\u60d1\uff0c\u5982\u679c\u5bf9\u4e8e\u4e00\u5f20\u8868\u800c\u8a00\uff0c\u6ca1\u6709\u5b9a\u4e49\u4e3b\u952e\u90a3\u8fd9\u5f20\u8868\u662f\u4e0d\u662f\u5c31\u6ca1\u6709\u805a\u7c07\u7d22\u5f15\u4e86\u5462\uff1f\u5e76\u4e0d\u662f\uff0c\u5982\u679c\u4e00\u5f20\u8868\u6ca1\u6709\u5b9a\u4e49\u4e3b\u952e\uff0c\u90a3\u4e48MySQL\u6216\u505a\u5982\u4e0b\u5de5\u4f5c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f1a\u4e3a\u5f53\u524d\u8868\u4e2d\u6dfb\u52a0\u4e86NOT NULL \u548cUNIQUE\u57df\u7ea6\u675f\u7684\u5217\u521b\u5efa\u805a\u7c07\u7d22\u5f15<\/li>\n\n\n\n<li>\u5982\u679c\u65e2\u6ca1\u6709\u5b9a\u4e49\u4e3b\u952e\uff0c\u4e5f\u6ca1\u6709\u5b9a\u4e49\u4e86NOT NULL\u548cUNIQUE\u7684\u5217\uff0c\u90a3\u4e48MySQL\u4f1a\u81ea\u52a8\u751f\u6210\u4e00\u4e2a\u540d\u4e3arow_id\u7684\u9690\u85cf\u5217\uff0cMySQL\u4fdd\u8bc1\u8be5\u5217\u7684\u503c\u5728\u4e00\u5f20\u8868\u4e2d\u4e0d\u4f1a\u91cd\u590d\u3002<\/li>\n\n\n\n<li>\u7136\u540e\u6839\u636erow_id\u8fd9\u4e00\u5217\u7684\u503c\u521b\u5efa\u805a\u7c07\u7d22\u5f15<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u805a\u7c07\u7d22\u5f15\u975e\u5e38\u91cd\u8981\uff0c\u6bcf\u5f20\u8868\u90fd\u5177\u6709\u805a\u7c07\u7d22\u5f15\uff0c\u4e14\u5176\u53f6\u5b50\u8282\u70b9\u4e2d\u5b58\u50a8\u7740\u8868\u4e2d\u6570\u636e\uff01<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-66-1024x657.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"657\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-66-1024x657.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-392\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e8c\u7ea7\u7d22\u5f15(InnoDB)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bb2\u5b8c\u4e86\u805a\u7c07\u7d22\u5f15\uff0c\u5f53\u6211\u4eec\u6839\u636eid\u503c\u8fdb\u884c\u67e5\u8be2\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u6839\u636e\u805a\u7c07\u7d22\u5f15\u5feb\u901f\u627e\u5230\u76ee\u6807\u884c\u3002\u4f46\u662f\uff0c\u5982\u679c\u6211\u4eec\u7684\u67e5\u8be2\u6761\u4ef6\u4e0d\u662f\u4e3b\u952e\u503c\uff0c\u800c\u662f\u5176\u4ed6\u5217\u7684\u503c\uff0c\u8fd8\u53ef\u4ee5\u7528\u5230\u805a\u7c07\u7d22\u5f15\u6765\u5b9e\u73b0<strong>\u5feb\u901f\u7684\u67e5\u8be2<\/strong>\u5417\uff1f\u7b54\u6848\u5f53\u7136\u662f\u5426\u5b9a\u7684\uff0c\u56e0\u4e3a\u805a\u7c07\u7d22\u5f15\u53ea\u6839\u636eid\u503c\u6709\u5e8f\uff0c\u4ece\u800c\u6784\u9020\u51fa\u4e86id\u503c\u6709\u5e8f\u7684B+\u6811\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u540c\u5b66\u53ef\u80fd\u9a6c\u4e0a\u5c31\u8981\u95ee\u4e86\uff0c\u53ea\u6709\u6839\u636e\u4e3b\u952e\u503c\u67e5\u8be2\u624d\u80fd\u7528\u5230\u7d22\u5f15\u5417\uff1f\u5f53\u7136\u4e0d\u662f\uff0c\u56e0\u4e3a\u4e00\u5f20\u8868\u53ef\u4ee5\u5177\u6709\u591a\u4e2a\u7d22\u5f15\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u9700\u8981\uff0c\u521b\u5efa\u9664\u4e3b\u952e\u5217\u4ee5\u5916\u7684\u5176\u4ed6\u5217\u7684B+\u6811\u7d22\u5f15\uff0c\u8fd9\u6837\u7684\u7d22\u5f15\u6211\u4eec\u79f0\u4e4b\u4e3a\u4e8c\u7ea7\u7d22\u5f15\u3002\u6bd4\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u5bf9age\u5217\u521b\u5efa\u7d22\u5f15\uff0c\u5982\u56fe\u6240\u793a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-62-1024x592.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"592\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-62-1024x592.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-387\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u9897\u6839\u636eage\u5217\u6240\u521b\u5efa\u7684B+\u6811\u7d22\u5f15(\u4e8c\u7ea7\u7d22\u5f15)\uff0c\u4e0e\u805a\u7c07\u7d22\u5f15\u76f8\u6bd4\uff0c\u6709\u5982\u4e0b\u533a\u522b:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\uff0c\u7d22\u5f15\u975e\u6570\u636e\u3002\u5728\u8fd9\u9897\u4e8c\u7ea7\u7d22\u5f15B+\u6811\u7684\u53f6\u5b50\u8282\u70b9(\u666e\u901a\u6570\u636e\u9875)\uff0c\u5e76\u6ca1\u6709\u5b58\u50a8\u5b8c\u6574\u7684\u8868\u4e2d\u884c\u6570\u636e\uff0c\u800c\u662f\u4ec5\u4ec5\u5b58\u50a8\u4e86\u8be5\u884c\u6570\u636e\u7684\u7d22\u5217\u7684\u503c(age\u503c) + \u8be5\u884c\u6570\u636e\u7684\u4e3b\u952e\u503c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u6b21\uff0c\u4e8c\u7ea7\u7d22\u5f15\u4e2d\u7684\u6570\u636e\u90fd\u662f\u6839\u636e\u7d22\u5f15\u5217age\u7684\u503c\u6765\u6392\u5e8f\uff0c\u5177\u4f53\u8868\u73b0\u5728:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53f6\u5b50\u7ed3\u70b9\uff0c\u5373\u666e\u901a\u6570\u636e\u9875\u548c\u76ee\u5f55\u9879\u6570\u636e\u9875\u5185\u7684\u6761\u6570\u636e\uff0c\u6309\u7167age\u5217\u7684\u503c\u6709\u5e8f<\/li>\n\n\n\n<li>\u5206\u5c42\u6765\u770b\uff0c\u6bcf\u5c42\u6570\u636e\u9875\u4e5f\u6309\u7167age\u5217\u6709\u5e8f<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u540e\uff0c\u5bf9\u4e8e\u6211\u4eec\u521b\u5efa\u7684\u4efb\u4f55\u4e00\u5f20\u8868\u800c\u8a00\uff0c\u805a\u7c07\u7d22\u5f15\u6c38\u8fdc\u53ea\u4f1a\u6709\u4e00\u4e2a\uff0c\u4f46\u662f\u4e8c\u7ea7\u7d22\u5f15\uff0c\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u9700\u8981\u521b\u5efa\u591a\u4e2a\uff01<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u770b\u770b\u5982\u4e0b\u7684SQL\uff0c\u6a21\u62df\u6839\u636eage\u5217\u521b\u5efa\u7684\u4e8c\u7ea7\u7d22\u5f15\uff0c\u6267\u884c\u67e5\u8be2\u7684\u8fc7\u7a0b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select * from index_demo where age = 14;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u67e5\u8be2\u8fc7\u7a0b\u5982\u4e0b:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u627e\u5230\u6839\u8282\u70b9\u6240\u5728\u7684\u9875\u9762\u5373\u987516\uff0c\u7ecf\u8fc7\u4e8c\u5206\u67e5\u627e\u786e\u5b9a\uff0cage\u503c\u4e3a14\u7684\u8bb0\u5f55\u5bf9\u5e94\u7684\u76ee\u5f55\u9879\u8bb0\u5f55\u6240\u5728\u7684\u9875\u4e3a72(12 &lt; 15 &lt; 80)<\/li>\n\n\n\n<li>\u7136\u540e\u518d\u5230\u987572\u4e2d\uff0c\u786e\u5b9aage\u4e3a14\u7684\u6570\u636e\u6240\u5728\u7684\u666e\u901a\u6570\u636e\u9875\u4e3a100(\u5bf9\u5e94\u7684\u76ee\u5f55\u9879\u6ca1\u753b\u51fa\u6765\uff0c\u4f46\u662f\u53ef\u4ee5\u63a8\u51fa\u6765)<\/li>\n\n\n\n<li>\u7136\u540e\u518d\u5230\u9875100\u4e2d\uff0c\u5728\u9875\u5185\u901a\u8fc7\u4e8c\u5206\u67e5\u627e\uff0c\u627e\u5230age\u503c\u4e3a14\u7684\u884c\u6570\u636e (age\u4e3a14\u7684\u884c\u6570\u636e\u53ef\u80fd\u6709\u591a\u6761)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\u5f88\u9057\u61be\uff0c\u5728\u4e8c\u7ea7\u7d22\u5f15\u4e2d\u5373\u4f7f\u6211\u4eec\u627e\u5230\u4e86age\u503c\u4e3a14\u67d0\u6761\u8bb0\u5f55\uff0c\u4f46\u91cc\u9762\u4ec5\u4ec5\u53ea\u5b58\u50a8\u4e86age\u4e3a14\u7684\u8fd9\u884c\u6240\u5bf9\u5e94\u7684\u4e3b\u952e\u503c\uff0c\u4f46\u662f\u6211\u4eec\u7528\u7684\u662fselect * \u7684\u65b9\u5f0f\u6765\u67e5\u8be2\u7684\uff0c\u600e\u4e48\u529e\u5462\uff1f\u5f88\u7b80\u5355\uff0c\u6211\u4eec\u53ea\u9700\u8981\u6839\u636e\u5df2\u77e5\u7684\u4e3b\u952e\u503c\uff0c\u5728\u53bb\u805a\u7c07\u7d22\u5f15\u4e2d\u67e5\u8be2\u4e00\u6b21\u5c31\u53ef\u4ee5\u5f97\u5230\u5b8c\u6574\u7684\u884c\u6570\u636e\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4e8c\u7ea7\u7d22\u5f15\u4e2d\u6839\u636e\u6761\u4ef6\u67e5\u8be2\u5230\u76ee\u6807\u884c\u6570\u636e\u7684\u4e3b\u952e\u503c\u4e4b\u540e\uff0c\u5982\u679c\u9700\u8981\u83b7\u53d6\u5b8c\u6574\u7684\u884c\u6570\u636e\uff0c\u5c31\u9700\u8981\u6839\u636e\u4ece\u4e8c\u7ea7\u7d22\u5f15\u4e2d\u5f97\u5230\u7684\u4e3b\u952e\u503c\u5728\u53bb\u67e5\u8be2\u4e00\u6b21\u805a\u7c07\u7d22\u5f15\uff0c\u8fd9\u4e00\u8fc7\u7a0b\u6211\u4eec\u79f0\u4e4b\u4e3a<strong>\u56de\u8868<\/strong>\u3002\u4e00\u822c\u6765\u8bf4\uff0c\u6839\u636e\u4e8c\u7ea7\u7d22\u5f15\u67e5\u8be2\uff0c\u4f46\u662f\u53c8\u9700\u8981\u67e5\u8be2\u51fa\u5b8c\u6574\u7684\u884c\u6570\u636e\uff0c\u90fd\u9700\u8981\u8fdb\u884c\u56de\u8868\u64cd\u4f5c\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8054\u5408\u7d22\u5f15<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u524d\u9762\u8bb2\u8fc7\u7684\u7d22\u5f15\uff0c\u90fd\u662f\u4ee5\u5355\u5217\u7684\u503c\u4f5c\u4e3a\u6392\u5e8f\u89c4\u5219\u521b\u5efa\u7684B+\u6811\u7d22\u5f15\uff0c\u6211\u4eec\u540c\u65f6\u4e5f\u53ef\u4ee5\u4ee5\u591a\u4e2a\u5217\u7684\u5927\u5c0f\u4f5c\u4e3a\u6392\u5e8f\u89c4\u5219\uff0c\u540c\u65f6\u4e3a\u591a\u4e2a\u5217\u5efa\u7acb\u7d22\u5f15\uff0c\u8fd9\u79cd\u7d22\u5f15\u6211\u4eec\u79f0\u4e4b\u4e3a\u8054\u5408\u7d22\u5f15\u3002\u6bd4\u5982\u6211\u4eec\u53ef\u4ee5\u540c\u65f6\u4e3aage\u5217\u548cname\u5217\u521b\u5efa\u7d22\u5f15\uff0c\u5176\u6bd4\u8f83\u89c4\u5219\u5982\u4e0b:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u6839\u636e\u7b2c\u4e00\u5217age\u7684\u503c\u6bd4\u8f83\u5927\u5c0f<\/li>\n\n\n\n<li>age\u5217\u503c\u76f8\u540c\uff0c\u518d\u6839\u636ename\u5217\u7684\u503c\u6bd4\u8f83\u5927\u5c0f<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6839\u636e\u4ee5\u4e0a\u7684\u6bd4\u8f83\u89c4\u5219\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u5982\u56fe\u6240\u793a\u7684\u8054\u5408\u7d22\u5f15\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-67-1024x628.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"628\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-67-1024x628.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-393\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e0a\u9762\u4ee5age\u548cname\u4e24\u5217\u6240\u521b\u5efa\u7684\u8054\u5408\u7d22\u5f15\uff0c\u56e0\u4e3a\u4e5f\u662f\u975e\u4e3b\u952e\u5217\u7d22\u5f15\uff0c\u6240\u4ee5\u4e5f\u5c5e\u4e8e\u4e8c\u7ea7\u7d22\u5f15<\/li>\n\n\n\n<li>\u5728\u8054\u5408\u7d22\u5f15B+\u6811\u7684\u53f6\u8282\u70b9\u4e2d\uff0c\u5b58\u50a8\u7684\u8868\u4e2d\u6bcf\u884c\u6570\u636e\u5bf9\u5e94\u6240\u6709\u7d22\u5f15\u5217\u503c(age, name)\u4ee5\u53ca\u5bf9\u5e94\u7684id\u4e3b\u952e\u5217\u7684\u503c<\/li>\n\n\n\n<li>\u5728\u6240\u6709\u7684\u76ee\u5f55\u9875\u4e2d\u7684\u76ee\u5f55\u9879\u4e3b\u8981\u5305\u542b \u6240\u6709\u7d22\u5f15\u5217(age,name)\u7684\u503c\u548c\u7684\u76ee\u5f55\u9879\u5bf9\u5e94\u7684\u9875\u53f7<\/li>\n\n\n\n<li>\u4ee5\u4e0a\u7684\u8054\u5408\u7d22\u5f15\u662f\u540c\u65f6\u6839\u636e<strong>age\u548cname\u4e24\u5217<\/strong>\u521b\u5efa\u7684<strong>\u4e00\u9897B+\u6811\u7d22\u5f15<\/strong>\uff0c\u4f46\u662f\u5982\u679c\u6211\u4eec\u8981\u5206\u522b\u6839\u636eage\u5217\u548cname\u5217\u521b\u5efaB+\u6811\u7d22\u5f15\uff0c\u90a3\u521b\u5efa\u51fa\u7684\u662f\u4e24\u4e2a\u4e0d\u540c\u7684B+\u6811\u7d22\u5f15<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4ee5\u4e0a\u8054\u5408\u7d22\u5f15\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u6a21\u62df\u4ee5\u4e0b\u67e5\u8be2\u8bed\u53e5\u7684\u67e5\u627e\u8fc7\u7a0b:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select * from index_demo where age=15 and name='bd'<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9996\u5148\u627e\u5230\u8054\u5408\u7d22\u5f15B+\u6811\u7684\u6839\u8282\u70b9\uff0c\u5148\u6bd4\u8f83age\u5217\u7684\u503c\uff0cage\u5217\u7684\u503c\u76f8\u540c\uff0c\u5728\u6bd4\u8f83name\u5217\u7684\u503c\uff0c\u786e\u5b9a\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\u6240\u5bf9\u5e94\u7684\u76ee\u5f55\u9879\u8bb0\u5f55\u6240\u5728\u7684\u9875\u53f7\u4e3a50 ( 12 &lt; 15 &lt; 80)<\/li>\n\n\n\n<li>\u627e\u5230\u76ee\u5f55\u9879\u6240\u5728\u7684\u76ee\u5f55\u9875\uff0c\u5728\u8fdb\u884c\u4e8c\u5206\u67e5\u627e\uff08 12 &lt; 15 &lt; 50\uff09,\u786e\u5b9a\u6570\u636e\u9875\u9875\u53f7\u4e3a45<\/li>\n\n\n\n<li>\u5728\u987545\u4e2d\uff0c\u5148\u6bd4\u8f83age\u7684\u503c\uff0c\u4ece\u800c\u627e\u5230\u6240\u6709\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\uff0c\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5728age\u503c\u76f8\u540c\u65f6\uff0c\u8bb0\u5f55\u4f1a\u6309\u7167name\u5217\u7684\u503c\u6392\u5e8f\uff0c\u56e0\u6b64name\u76f8\u540c\u7684\u8bb0\u5f55\u7d27\u90bb\u3002<\/li>\n\n\n\n<li>\u6240\u4ee5\u5728\u6ee1\u8db3age\u6761\u4ef6\u7684\u8bb0\u5f55\u96c6\u5408\u4e2d\uff0c\u5728\u6839\u636ename\u6761\u4ef6\u8fdb\u884c\u5224\u65ad\uff0c\u5feb\u901f\u6700\u7ec8\u627e\u5230\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\u96c6\u5408<\/li>\n\n\n\n<li>\u5de7\u5408\u7684\u662f\uff0c\u56e0\u4e3a\u6211\u4eec\u521b\u5efa\u7684\u8868\u5f88\u7b80\u5355\uff0c\u5728\u8fd9\u4e2a\u8054\u5408\u7d22\u5f15\u53f6\u8282\u70b9\u4e2d\u521a\u597d\u5305\u542b\u4e86\u5b8c\u6574\u7684\u884c\u6570\u636e\uff0c\u6240\u4ee5\u4e0d\u7528\u5728\u6267\u884c\u56de\u8868\u64cd\u4f5c<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">MyISAM\u5b58\u50a8\u5f15\u64ce<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u524d\u9762\u6211\u4eec\u4ecb\u7ecd\u7684\u90fd\u662fInnoDB\u5b58\u50a8\u5f15\u64ce\u4e2d\u7684\u7d22\u5f15\u65b9\u6848\uff0c\u8fd9\u4e5f\u662f\u6211\u4eec\u5b9e\u9645\u5f00\u53d1\u4e2d\u6700\u5e38\u7528\u7684\u3002\u4f46\u662f\u9274\u4e8e\u9762\u8bd5\u4e2d\u53ef\u80fd\u4f1a\u63d0\u53ca\uff0c\u6240\u4ee5\u6211\u4eec\u5728\u7ed9\u5927\u5bb6\u7b80\u5355\u4ecb\u7ecd\u4e0bMyISAM\u5b58\u50a8\u5f15\u64ce\u7684\u7d22\u5f15\u65b9\u6848\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u77e5\u9053\u5728InnoDB\u5b58\u50a8\u5f15\u64ce\u4e2d\u7684\u7d22\u5f15\u65b9\u6848\u6709\u4e00\u4e2a\u7279\u5f81\uff0c\u7d22\u5f15\u5373\u6570\u636e\uff0c\u56e0\u4e3a\u6bcf\u5f20\u8868\u90fd\u4f1a\u81ea\u52a8\u521b\u5efa\u805a\u7c07\u7d22\u5f15\u3002\u800cMyISAM\u5b58\u50a8\u5f15\u64ce\u7684\u7d22\u5f15\u65b9\u6848\u867d\u7136\u4e5f\u4f7f\u7528\u6811\u5f62\u7ed3\u6784\uff0c\u4f46\u662f\u5374\u662f\u5c06\u7d22\u5f15\u548c\u6570\u636e\u5206\u5f00\u5b58\u653e\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9996\u5148\u5bf9\u4e8e\u6bcf\u4e00\u5f20\u8868\u4e2d\u6240\u6709\u7684\u884c\u6570\u636e\uff0c\u90fd\u4f1a\u6309\u7167\u6570\u636e\u7684\u63d2\u5165\u987a\u5e8f\uff0c\u4e00\u884c\u4e00\u884c\u7684\u653e\u5165\u5230\u4e00\u4e2a\u6587\u4ef6\u4e2d\uff0c\u8fd9\u4e2a\u6587\u4ef6\u79f0\u4e4b\u4e3a<strong>\u6570\u636e\u6587\u4ef6<\/strong>\u3002\u5728\u8fd9\u4e2a\u6587\u4ef6\u4e2d\uff0c\u6bcf\u4e00\u884c\u6570\u636e\u90fd\u6709\u4e00\u4e2a\u552f\u4e00\u7684\u884c\u53f7\uff0c\u5982\u56fe\u6240\u793a\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-54-1024x507.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"507\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-54-1024x507.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-379\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">MyISAM\u4f1a\u5c06\u8868\u7684\u7d22\u5f15\u5b58\u50a8\u5230\u53e6\u5916\u4e00\u4e2a\u7d22\u5f15\u6587\u4ef6\u4e2d\uff0c\u548cInnoDB\u7c7b\u4f3cMyISAM\u4e5f\u4f1a\u4e3a\u81ea\u52a8\u6839\u636e\u6bcf\u5f20\u8868\u7684\u4e3b\u952e\uff0c\u81ea\u52a8\u521b\u5efa\u7d22\u5f15\uff0c\u53ea\u4e0d\u8fc7\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u4e2d\u5b58\u50a8\u7684\u4e0d\u662f\u5b8c\u6574\u7684\u7528\u6237\u8bb0\u5f55\uff0c\u800c\u662f\u8be5\u8bb0\u5f55\u5728\u6570\u636e\u6587\u4ef6\u4e2d\u6240\u5bf9\u5e94\u7684\u884c\u53f7 + \u4e3b\u952e\u503c\u3002\u6240\u4ee5\u5728\u8be5\u7d22\u5f15\u4e2d\u67e5\u8be2\u7684\u65f6\u5019\uff0c\u9700\u8981\u5148\u67e5\u8be2\u4e3b\u952e\u7d22\u5f15\uff0c\u7136\u540e\u505a\u4e00\u6b21\u7c7b\u4f3c\u4e8eInnoDB\u4e2d\u7684<strong>\u56de\u8868<\/strong>\u64cd\u4f5c\uff0c\u624d\u80fd\u67e5\u8be2\u5230\u5b8c\u6574\u7684\u884c\u6570\u636e\uff0c\u8fd9\u5c31\u610f\u5473\u7740\u5982\u679c\u505a\u4e00\u4e2a\u7c7b\u6bd4\u7684\u8bdd\uff0c\u5728MyISAM\u5b58\u50a8\u5f15\u64ce\u4e2d\u6240\u521b\u5efa\u7684\u6240\u6709\u7684\u7d22\u5f15\uff0c\u90fd<strong>\u76f8\u5f53\u4e8eInnoDB\u4e2d\u7684\u4e8c\u7ea7\u7d22\u5f15<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6709\u9700\u8981\u7684\u8bdd\uff0c\u6211\u4eec\u5b8c\u5168\u53ef\u4ee5\u5bf9\u5176\u4ed6\u5217\u5206\u522b\u5efa\u7acb\u7d22\u5f15\u6216\u8005\u8054\u5408\u7d22\u5f15\uff0c\u539f\u7406\u548cInnoDB\u4e2d\u7684B+\u6811\u7d22\u5f15\u5dee\u4e0d\u591a\uff0c\u552f\u4e00\u7684\u533a\u522b\u662f\u53f6\u5b50\u8282\u70b9\u5904\uff0c\u5b58\u50a8\u7684\u662f\u7d22\u5f15\u5217\u7684\u503c + \u6570\u636e\u6587\u4ef6\u884c\u53f7\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u7136\uff0c\u5728\u7406\u89e3\u4e86\u4ee5\u4e0aMyISAM\u5b58\u50a8\u5f15\u64ce\u7279\u5f81\u4e4b\u540e\uff0c\u6211\u4eec\u9700\u8981\u518d\u58f0\u660e\u4e00\u70b9\uff0c\u5728MyISAM\u5b58\u50a8\u5f15\u64ce\u4e2d\u521b\u5efa\u7684\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u4e2d\u5b58\u50a8\u7684\u5e76\u4e0d\u4e00\u5b9a\u662f\u5bf9\u5e94\u7684\u6570\u636e\u6587\u4ef6\u4e2d\u7684\u884c\u53f7\uff0c\u8fd9\u8fd8\u8981\u770b\u6570\u636e\u6587\u4ef6\u4e2d\u5b58\u50a8\u884c\u6570\u636e\u4f7f\u7528\u7684\u662f\u4ec0\u4e48\u683c\u5f0f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u662f\u5b9a\u957f\u683c\u5f0f\uff0c\u5373\u6bcf\u4e00\u884c\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u5927\u5c0f\u76f8\u540c\uff0c\u5219\u7d22\u5f15\u53f6\u8282\u70b9\u5b58\u50a8\u884c\u53f7<\/li>\n\n\n\n<li>\u5426\u5219\u5982\u679c\u4e0d\u662f\u5b9a\u957f\u683c\u5f0f\uff0c\u5373\u4e0d\u540c\u7684\u884c\u6570\u636e\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u5927\u5c0f\u4e0d\u540c\uff0c\u5219\u7d22\u5f15\u53f6\u5b50\u8282\u70b9\u5b58\u50a8\u6bcf\u884c\u6570\u636e\u5bf9\u5e94\u7684\u5730\u5740\u504f\u79fb\u91cf<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u9664\u4e86\u7d22\u5f15\u5b9e\u73b0\u7684\u533a\u522b\u4e4b\u5916\uff0c\u5b83\u4eec\u8fd8\u6709\u5982\u4e0b \u4e3b\u8981\u7684\u533a\u522b:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>InnoDB \u652f\u6301\u4e8b\u52a1\u5904\u7406\uff0c\u800cMyISAM\u4e0d\u652f\u6301\u4e8b\u52a1\uff0c\u56e0\u6b64MyISAM\u66f4\u9002\u5408\u4e8e\u53ea\u8bfb\u6570\u636e\u6216\u8005\u5728\u6570\u636e\u5b8c\u6574\u6027\u8981\u6c42\u4e0d\u9ad8\u7684\u573a\u5408\u4f7f\u7528\u3002<\/li>\n\n\n\n<li>InnoDB\u652f\u6301\u884c\u7ea7\u9501\uff0c\u4f46\u662fMyISAM\u53ea\u652f\u6301\u8868\u7ea7\u9501<\/li>\n\n\n\n<li>InnoDB\u63d0\u4f9b\u4e86\u5d29\u6e83\u6062\u590d\u673a\u5236\uff0c\u4f46\u662fMyISAM\u7f3a\u5c11\u5d29\u6e83\u6062\u590d\u673a\u5236<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u7d22\u5f15\u7684\u4f7f\u7528(InnoDB)<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u5b66\u4e60\u4e86InnoDB\u7684\u7d22\u5f15\u539f\u7406\u4e4b\u540e\uff0c\u53ef\u4ee5\u5f97\u5230\u4e00\u4e2a\u7ed3\u8bba\uff0c\u5982\u679c\u5728\u67e5\u8be2\u7684\u65f6\u5019\uff0c\u53ef\u4ee5\u7528\u5230\u7d22\u5f15\uff0c\u53ef\u80fd\u4f1a\u663e\u8457\u7684\u63d0\u9ad8\u67e5\u8be2\u6548\u7387\u3002\u63a5\u4e0b\u6765\uff0c\u5c31\u6709\u4e00\u4e2a\u95ee\u9898\u4e86\uff0c\u662f\u4e0d\u662f\u7d22\u5f15\u521b\u5efa\u7684\u8d8a\u591a\u8d8a\u597d\u5462\uff1f\u5f53\u7136\u4e0d\u662f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u7a7a\u95f4\u4e0a\u6765\u8bf4\uff0c\u6211\u4eec\u6bcf\u521b\u5efa\u4e00\u4e2a\u7d22\u5f15\uff0c\u5c31\u4f1a\u751f\u6210\u4e00\u9897\u65b0\u7684B+\u6811\uff0c\u4e00\u9897B+\u6811\u4e2d\u53ef\u80fd\u5305\u542b\u5f88\u591a\u8282\u70b9\uff0c\u800c\u6bcf\u4e00\u4e2a\u8282\u70b9\u90fd\u5bf9\u5e94\u4e00\u4e2a\u9ed8\u8ba416KB\u5927\u5c0f\u7684\u6570\u636e\u9875\uff0c\u6240\u4ee5\u4e00\u9897B+\u6811\u4f1a\u5360\u7528\u5927\u91cf\u7684\u5b58\u50a8\u7a7a\u95f4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u65f6\u95f4\u4e0a\u6765\u8bf4<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u8868\u4e2d\u7684\u6570\u636e\u505a\u4efb\u4f55\u589e\u5220\u6539\u7684\u64cd\u4f5c\uff0c\u90fd\u9700\u8981\u5728\u805a\u7c07\u7d22\u5f15\uff0c\u4ee5\u53ca\u5bf9\u5e94\u7684\u6240\u6709\u4e8c\u7ea7\u7d22\u5f15\u505a\u51fa\u76f8\u5e94\u7684\u4fee\u6539\uff0c\u4f1a\u4e00\u5b9a\u7a0b\u5ea6\u5f71\u54cd\u589e\u5220\u6539\u7684\u6548\u7387<\/li>\n\n\n\n<li>\u4e0d\u8bba\u662fB+\u6811\u4e2d\u7684\u53f6\u5b50\u8282\u70b9\uff0c\u8fd8\u662f\u975e\u53f6\u5b50\u8282\u70b9\u4e2d\u7684\u8bb0\u5f55\u90fd\u662f\u6309\u7167\u7d22\u5f15\u5217\u503c\u6765\u6392\u5e8f\u7684\uff0c\u800c\u589e\u5220\u6539\u64cd\u4f5c\u5f80\u5f80\u4f1a\u7834\u4f1a\u8fd9\u4e2a\u987a\u5e8f\uff0c\u6240\u4ee5\u5b58\u50a8\u5f15\u64ce\u4e3a\u4e86\u7ef4\u62a4\u8fd9\u4e2a\u987a\u5e8f\uff0c\u9700\u8981\u989d\u5916\u505a\u4e00\u4e9b\u8bb0\u5f55\u7684\u79fb\u4f4d\uff0c\u9875\u9762\u7684\u5206\u88c2\u7b49\u64cd\u4f5c\uff0c\u5373\u9700\u8981\u4ed8\u51fa\u4e00\u5b9a\u7684\u4ee3\u4ef7<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\uff0c\u6211\u4eec\u4e3a\u4e00\u5f20\u8868\u521b\u5efa\u7684\u7d22\u5f15\u8d8a\u591a\uff0c\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u5c31\u8d8a\u5927\uff0c\u589e\u5220\u6539\u7684\u6548\u7387\u5c31\u8d8a\u4f4e\u3002\u4e3a\u4e86\u80fd\u521b\u5efa\u53c8\u5c11\u53c8\u597d\u7528\u7684\u7d22\u5f15\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u9700\u8981\u7814\u7a76\u4e00\u4e0b\u7d22\u5f15\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u66f4\u597d\u4e3e\u4f8b\u8bf4\u660e\uff0c\u6211\u4eec\u521b\u5efa\u5982\u4e0b\u7684\u4e00\u5f20\u8868\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE `user` (\n  `id` int NOT NULL AUTO_INCREMENT,\n  `name` varchar(10) DEFAULT NULL,\n  `birthday` date DEFAULT NULL,\n  `point` bigint DEFAULT NULL,\n  `city` varchar(20) DEFAULT NULL,\n  PRIMARY KEY (`id`),\n  index `idx_name_birthday_city` (`name`,`birthday`,`city`) # \u7ed9name,birthday,city\u521b\u5efa\u8054\u5408\u7d22\u5f15\n);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fd9\u5f20user\u8868\u4e2d\u6709\u4e24\u4e2a\u7d22\u5f15\uff0c\u4e00\u4e2a\u805a\u7c07\u7d22\u5f15\u4e00\u4e2a\u8054\u5408\u7d22\u5f15\uff0c\u6240\u4ee5\u6211\u4eec\u4f1a\u6709\u4e24\u9897B+\u6811\uff0c\u5176\u4e2d\u8054\u5408\u7d22\u5f15\u7684\u5982\u56fe:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-65-1024x515.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"515\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-65-1024x515.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-391\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u518d\u6b21\u5f3a\u8c03\uff0c\u5927\u5bb6\u4e00\u5b9a\u8981\u6ce8\u610f\uff0c\u5728\u6b64\u8054\u5408\u7d22\u5f15\u7684B+\u6811\u4e2d\uff0c\u4e0d\u7ba1\u662f\u76ee\u5f55\u9875\u8fd8\u662f\u666e\u901a\u6570\u636e\u9875\u4e2d\uff0c\u8bb0\u5f55\u7684\u6392\u5e8f\u89c4\u5219\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u6309\u7167\u59d3\u540d\u6392\u5e8f(\u5b57\u7b26\u4e32\u5b57\u5178\u5e8f)<\/li>\n\n\n\n<li><strong>\u59d3\u540d\u76f8\u540c<\/strong>\u5728\u6839\u636e\u751f\u65e5\u65e5\u671f\u5927\u5c0f\u6392\u5e8f<\/li>\n\n\n\n<li><strong>\u59d3\u540d\u548c\u51fa\u751f\u65e5\u671f\u90fd\u76f8\u540c<\/strong>\uff0c\u518d\u6839\u636e\u57ce\u5e02\u6392\u5e8f(\u5b57\u7b26\u4e32\u5b57\u5178\u5e8f)<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u67e5\u8be2\u4e2d\u7684\u4f7f\u7528<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u7ed9\u5927\u5bb6\u5206\u6790\u4e00\u4e0b\u7d22\u5f15\u901a\u5e38\u5728\u67e5\u8be2\u4e2d\u4f7f\u7528\u7684\u4e00\u4e9b\u5178\u578b\u573a\u666f\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5168\u503c\u5339\u914d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6211\u4eec\u7684\u641c\u7d22\u6761\u4ef6\u4e2d\u7684\u5217\u548c\u7d22\u5f15\u5217\u4e00\u81f4\uff0c\u4e14\u6307\u5b9a\u6bcf\u4e00\u5217\u7684\u7cbe\u786e\u503c\uff0c\u8fd9\u79cd\u67e5\u8be2\u5c31\u79f0\u4e3a\u5168\u503c\u5339\u914d\uff0c\u6bd4\u5982\u4e0b\u9762\u7684\u67e5\u8be2\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>select * from user where name='aq' and birthday='2002-10-10' and city='\u5317\u4eac'\n\nselect * from user where name='aq' and city='\u5317\u4eac'and birthday='2002-10-10'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5SQL\u8bed\u53e5\u7684\u67e5\u8be2\u6761\u4ef6\u4e2d\u5305\u542b\u4e86idx_name_birthday_city\u7d22\u5f15\u4e2d\u7684\u6240\u6709\u7d22\u5f15\u5217\uff0c\u6211\u4eec\u53ef\u4ee5\u6a21\u62df\u4ee5\u4e0a\u67e5\u8be2\u8fc7\u7a0b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728\u8054\u5408\u7d22\u5f15\u7684B+\u6811\u4e0a\uff0c\u4ece\u6839\u8282\u70b9\u51fa\u53d1\u5148\u6839\u636ename\u6761\u4ef6\u5b9a\u4f4d\u5230\u7b2c\u4e00\u4e2a\u6ee1\u8db3name=&#8217;aq&#8217;\u6761\u4ef6\u7684\u7b2c\u4e00\u6761\u8bb0\u5f55<\/li>\n\n\n\n<li>\u56e0\u4e3aidx_name_birthday_city\u9996\u5148\u6839\u636ename\u5217\u7684\u503c\u6392\u5e8f\uff0c\u6240\u4ee5name\u503c\u76f8\u540c\u7684\u8bb0\u5f55\u7d27\u90bb\uff0c\u6240\u4ee5\u4ece\u6ee1\u8db3name=\u2018aq\u2019\u7684\u7b2c\u4e00\u6761\u8bb0\u5f55\u5f00\u59cb\uff0c\u4f9d\u6b21\u5411\u540e\u904d\u5386\uff0c\u76f4\u5230\u627e\u5230\u6240\u6709name=\u2018aq\u2019\u7684\u8bb0\u5f55<\/li>\n\n\n\n<li>\u7136\u540e\uff0c\u56e0\u4e3a\u5bf9\u4e8ename=\u2018aq\u2019\u7684\u6240\u6709\u8bb0\u5f55\uff0c\u5728\u8054\u5408\u7d22\u5f15\u4e2d\u4f1a\u6839\u636ebirthday\u6392\u5e8f\uff0cbirthday\u503c\u76f8\u540c\u7684\u8bb0\u5f55\u540c\u6837\u4f1a\u7d27\u90bb\uff0c\u6240\u4ee5\u63a5\u4e0b\u6765\u53ef\u4ee5\u5feb\u901f\u5728\u6ee1\u8db3name=\u2018aq\u2019\u7684\u96c6\u5408\u4e2d\uff0c\u5f97\u5230\u6ee1\u8db3\u540c\u65f6\u6ee1\u8db3birthday=&#8217;2002-10-10&#8217;\u7684\u8bb0\u5f55<\/li>\n\n\n\n<li>\u6ee1\u8db3name=\u2018aq\u2019\u4e14birthday=&#8217;2002-10-10\u6761\u4ef6\u7684\u8bb0\u5f55\uff0c\u5728\u8054\u5408\u7d22\u5f15\u4e2d\u4f1a\u6839\u636ecity\u5217\u7684\u503c\u6392\u5e8f\uff0c\u6240\u4ee5city\u503c\u76f8\u540c\u7684\u8bb0\u5f55\u4e5f\u4f1a\u7d27\u90bb\uff0c\u6240\u4ee5\u5728\u5176\u4e2d\uff0c\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u5230\u6240\u6709city=&#8217;\u5317\u4eac&#8217;\u7684\u8bb0\u5f55<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u540c\u5b66\u53ef\u80fd\u4f1a\u6709\u7591\u95ee\uff0c\u5bf9\u4e8e\u5168\u503c\u5339\u914d\u800c\u8a00\uff0c\u6761\u4ef6\u7684\u4e66\u5199\u987a\u5e8f\uff0c\u5fc5\u987b\u548c\u7d22\u5f15\u5217\u4e2d\u5b9a\u4e49\u7684\u987a\u5e8f\u76f8\u540c\u5417\uff1f\u5176\u5b9e\u4e0d\u7528\uff0c\u56e0\u4e3aMySQL\u4f18\u5316\u5668\u4f1a\u5206\u6790\u8fd9\u4e9b\u641c\u7d22\u6761\u4ef6\uff0c\u5e76\u4e14\u6309\u7167\u53ef\u4ee5\u4f7f\u7528\u7684\u7d22\u5f15\u4e2d\u5217\u7684\u987a\u5e8f\u6765\u51b3\u5b9a\u5148\u4f7f\u7528\u54ea\u4e2a\u641c\u7d22\u6761\u4ef6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ec6\u5fc3\u7684\u540c\u5b66\u4e00\u5b9a\u53d1\u73b0\u4e86\uff0c\u5176\u5b9e\u5230\u8fd9\u91cc\u6211\u4eec\u7684\u67e5\u8be2\u8fd8\u6ca1\u6709\u7ed3\u675f\uff0c\u56e0\u4e3a\u6211\u4eec\u53ea\u662f\u5728idx_name_birthday_city\u4e2d\u67e5\u8be2\u5230\u4e86\u6ee1\u8db3\u6761\u4ef6\u7684\u8bb0\u5f55\uff0c\u4f46\u662f\u8fd9\u4e9b\u8bb0\u5f55\u4e2d\u5e76\u672a\u5305\u542bpoint\u5217\u7684\u503c\uff0c\u800c\u6211\u4eec\u4f7f\u7528\u7684\u67e5\u8be2\u8bed\u6cd5\u4e3aselect *\uff0c\u6240\u4ee5\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u8fd8\u9700\u8981\u56de\u8868\uff0c\u6839\u636eidx_name_birthday_city\u4e2d\u67e5\u8be2\u5230\u7684\u4e3b\u952eid\u503c\uff0c\u53bb\u805a\u7c07\u7d22\u5f15\u4e2d\u67e5\u8be2\u51fa\u6240\u6709\u6ee1\u8db3\u6761\u4ef6\u7684\u5b8c\u6574\u884c\u6570\u636e\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5339\u914d\u5de6\u8fb9\u7684\u5217(\u6700\u5de6\u524d\u7f00)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u5b9e\u5728\u6211\u4eec\u7684\u641c\u7d22\u8bed\u53e5\u4e2d\u4e5f\u53ef\u4ee5\u4e0d\u7528\u5305\u542b\u5168\u90e8\u8054\u5408\u7d22\u5f15\u4e2d\u7684\u5217\uff0c\u53ea\u5305\u542b\u8054\u5408\u7d22\u5f15\u4e2d\u5de6\u8fb9\u8fde\u7eed\u5217\u5c31\u884c\uff0c\u6bd4\u65b9\u8bf4\u4e0b\u8fb9\u7684\u67e5\u8be2\u8bed\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name = 'aq';<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6216\u8005\u5305\u542b\u591a\u4e2a\u5de6\u8fb9\u7684\u5217\u4e5f\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name = 'aq' AND birthday = '2002-10-10';\n\nSELECT * FROM user WHERE name = 'aq' AND birthday = '2002-10-10' and city='\u5317\u4eac';<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u540c\u5b66\u53ef\u80fd\u9a6c\u4e0a\u5c31\u8981\u95ee\u4e86\uff0c\u90a3\u4e3a\u4ec0\u4e48\u641c\u7d22\u6761\u4ef6\u4e2d\u5fc5\u987b\u51fa\u73b0\u5de6\u8fb9\u7684\u5217\u624d\u53ef\u4ee5\u4f7f\u7528\u5230\u8fd9\u4e2a B+ \u6811\u7d22\u5f15\u5462\uff1f\u6bd4\u5982\u4e0b\u8fb9\u7684\u8bed\u53e5\u5c31\u7528\u4e0d\u5230\u8fd9\u4e2aB+\u6811\u7d22\u5f15\u4e48\uff1f<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE birthday = '2002-10-10';\nSELECT * FROM user WHERE birthday = '2002-10-10' and city = \u5317\u4eac;\nSELECT * FROM user WHERE  city = \u5317\u4eac;\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u662f\u7684\uff0c\u7684\u786e\u7528\u4e0d\u5230\u3002\u56e0\u4e3aB+\u6811\u7684\u6570\u636e\u9875\u548c\u76ee\u5f55\u9875\u4e2d\u7684\u8bb0\u5f55\u662f\u5148\u6309\u7167 name \u5217\u7684\u503c\u6392\u5e8f\u7684\uff0c\u5728name \u5217\u7684\u503c\u76f8\u540c\u7684\u60c5\u51b5\u4e0b\u624d\u4f7f\u7528 birthday\u5217\u8fdb\u884c\u6392\u5e8f\uff0c\u4e5f\u5c31\u662f\u8bf4 name \u5217\u7684\u503c\u4e0d\u540c\u7684\u8bb0\u5f55\u4e2d birthday \u7684\u503c\u53ef\u80fd\u662f\u65e0\u5e8f\u7684\uff0c\u8fd9\u5c31\u610f\u5473\u7740birthday\u5217\u503c\u76f8\u540c\u7684\u8bb0\u5f55\u5e76\u4e0d\u4f1a\u7d27\u90bb\uff0c\u4e14\u65e0\u6cd5\u4f7f\u7528\u4e8c\u5206\u67e5\u627e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u9700\u8981\u7279\u522b\u6ce8\u610f\u7684\uff1a<strong>\u5982\u679c\u6211\u4eec\u60f3\u4f7f\u7528\u8054\u5408\u7d22\u5f15\u4e2d\u5c3d\u53ef\u80fd\u591a\u7684\u5217\uff0c\u641c\u7d22\u6761\u4ef6\u4e2d\u7684\u5404\u4e2a\u5217\u5fc5\u987b\u662f\u8054\u5408\u7d22\u5f15\u4e2d\u4ece\u6700\u5de6\u8fb9\u8fde\u7eed\u7684\u5217<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\u4ee5\u4e0b\u67e5\u8be2\u6761\u4ef6\uff0c\u5c31\u80fd\u7528\u5230name\u5217\u7684\u7d22\u5f15<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name = 'zs' AND city = '\u6b66\u6c49'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5173\u4e8e\u8fd9\u4e2a\u4f8b\u5b50\u6211\u4eec\u9700\u8981\u6ce8\u610f\u7684\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6839\u636ename\u5217\u7684\u67e5\u8be2\u6761\u4ef6\uff0c\u662f\u53ef\u4ee5\u7528\u5230idx_name_birthday_city\u7d22\u5f15\u7684\uff0c\u56e0\u4e3a\u65e0\u8bba\u6570\u636e\u9875\u8fd8\u662f\u76ee\u5f55\u9875\u4e2d\u7684\u8bb0\u5f55\u90fd\u6839\u636ename\u5217\u6709\u5e8f<\/li>\n\n\n\n<li>\u4f46\u662f\uff0ccity\u5217\u7684\u67e5\u8be2\u6761\u4ef6\u65e0\u6cd5\u4f7f\u7528\u8054\u5408\u7d22\u5f15\u4e2d\u7684city\u7d22\u5f15\u5217\uff0c\u56e0\u4e3a\u5728\u53ea\u6709\u5728birthday\u76f8\u540c\u7684\u60c5\u51b5\u4e0b\uff0cidx_name_birthday_city\u7d22\u5f15\u7684city\u5217\u624d\u662f\u6709\u5e8f\u7684<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u5339\u914d\u5217\u524d\u7f00(\u9488\u5bf9\u5b57\u7b26\u4e32)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u5b9e\uff0c\u4e3a\u67d0\u4e2a\u5217\u5efa\u7acb\u7d22\u5f15\u7684\u610f\u601d\u5c31\u662f\u5728\u5bf9\u5e94\u7684B+ \u6811\u7684\u8bb0\u5f55\u4e2d\u4f7f\u7528\u8be5\u5217\u7684\u503c\u8fdb\u884c\u6392\u5e8f\u3002\u6bd4\u5982\u8bf4\u8054\u5408\u7d22\u5f15idx_name_birthday_city\u4f1a\u5148\u7528name\u5217\u7684\u503c\u6392\u5e8f\uff0c\u6240\u4ee5\u8fd9\u4e2a\u8054\u5408\u7d22\u5f15\u5bf9\u5e94\u7684B+\u6811\u8bb0\u5f55\u4e2d\u7684 name \u5217\u6392\u5217\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>aq\naq\naqg\naxl\nbbb\nccc\nzzz\n...<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">name\u7684\u503c\u662f\u5b57\u7b26\u4e32\u7c7b\u578b\uff0c\u6240\u4ee5\u5176\u5b9ename\u5217\u662f\u6839\u636e\u5b57\u7b26\u4e32\u6bd4\u8f83\u89c4\u5219\u6392\u5e8f\uff0c\u4e00\u822c\u6765\u8bf4\uff0c\u6211\u4eec\u8ba4\u4e3a\u5b57\u7b26\u4e32\u6839\u636e\u5b57\u5178\u5e8f\u6392\u5e8f\uff0c\u5176\u6392\u5e8f\u7279\u5f81\u4e3a\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u6309\u7167\u5b57\u7b26\u4e32\u7684\u7b2c\u4e00\u4e2a\u5b57\u7b26\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u7b2c\u4e00\u4e2a\u5b57\u7b26\u76f8\u540c\u518d\u6309\u7167\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u8fdb\u884c\u6392\u5e8f\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u7b2c\u4e8c\u4e2a\u5b57\u7b26\u76f8\u540c\u518d\u6309\u7167\u7b2c\u4e09\u4e2a\u5b57\u7b26\u8fdb\u884c\u6392\u5e8f\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e5f\u5c31\u662f\u8bf4\u8fd9\u4e9b\u5b57\u7b26\u4e32\u7684\u524dn\u4e2a\u5b57\u7b26\uff0c\u4e5f\u5c31\u662f\u524d\u7f00\u90fd\u662f\u6392\u597d\u5e8f\u7684\uff0c\u6240\u4ee5\u5bf9\u4e8e\u5b57\u7b26\u4e32\u7c7b\u578b\u7684\u7d22\u5f15\u5217\u6765\u8bf4\uff0c\u6211\u4eec\u53ea\u5339\u914d \u5b83\u7684\u524d\u7f00\u4e5f\u662f\u53ef\u4ee5\u5feb\u901f\u5b9a\u4f4d\u8bb0\u5f55\u7684\u3002\u6bd4\u5982\u8bf4\u6211\u4eec\u60f3\u67e5\u8be2\u540d\u5b57\u4ee5 &#8216;a&#8217; \u5f00\u5934\u7684\u540d\u5b57\uff0c\u90a3\u5c31\u53ef\u4ee5\u8fd9\u4e48\u5199\u67e5\u8be2\u8bed\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code> SELECT * FROM user WHERE name LIKE 'a%'; <\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u53ea\u7ed9\u51fa\u540e\u7f00\u6216\u8005\u4e2d\u95f4\u7684\u67d0\u4e2a\u5b57\u7b26\u4e32\uff0c\u6bd4\u5982\u8fd9\u6837\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name LIKE '%a%';\n\nSELECT * FROM user WHERE name LIKE '%a';<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">MySQL \u5c31\u65e0\u6cd5\u5feb\u901f\u5b9a\u4f4d\u8bb0\u5f55\u4f4d\u7f6e\u4e86\uff0c\u56e0\u4e3a\u5b57\u7b26\u4e32\u4e2d\u95f4\u6216\u540e\u7f00\u6709 &#8216;a&#8217; \u7684\u5b57\u7b26\u4e32\u5e76\u6ca1\u6709\u6392\u597d\u5e8f\uff0c\u6240\u4ee5\u53ea\u80fd\u5168\u8868\u626b\u63cf\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\u6709\u65f6\u5019\u6211\u4eec\u6709\u4e00\u4e9b\u5339\u914d\u67d0\u4e9b\u5b57\u7b26\u4e32\u540e\u7f00\u7684\u9700\u6c42\uff0c\u6bd4\u65b9\u8bf4\u67d0\u4e2a\u8868\u6709\u4e00\u4e2a url \u5217\uff0c\u8be5\u5217\u4e2d\u5b58\u50a8\u4e86\u8bb8\u591aurl\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code> www.baidu.com \n www.google.com\n www.github.com\n ...\n www.stackoverflow.com\n www.redis.cn\n www.redis.io<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8bbe\u5df2\u7ecf\u5bf9\u8be5 url \u5217\u521b\u5efa\u4e86\u7d22\u5f15\uff0c\u5982\u679c\u6211\u4eec\u60f3\u67e5\u8be2\u4ee5 com \u4e3a\u540e\u7f00\u7684\u7f51\u5740\u7684\u8bdd\u53ef\u4ee5\u8fd9\u6837\u5199\u67e5\u8be2\u6761\u4ef6\uff0c<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>WHERE url LIKE '%com'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\u8fd9\u6837\u7684\u8bdd\u65e0\u6cd5\u4f7f\u7528\u8be5 url \u5217\u7684\u7d22\u5f15\u3002\u600e\u4e48\u529e\u5462\uff1f\u5176\u5b9e\u6211\u4eec\u53ef\u4ee5\u628a\u8868\u4e2d\u7684\u6570\u636e\u5168\u90e8\u9006\u5e8f\u5b58\u50a8\u4e00\u4e0b<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>com.baidu.www \ncom.google.www\ncom.github.www\n ...\ncom.stackoverflow.www\ncn.redis.www\nio.redis.www<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>WHERE url LIKE 'com%'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u4e00\u6765\uff0c\u5c31\u53ef\u4ee5\u628a\u540e\u7f00\u67e5\u8be2\u6539\u5199\u6210\u524d\u7f00\u67e5\u8be2\uff0c\u4f7f\u7528\u5230\u7d22\u5f15\u4e86\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8303\u56f4\u5339\u914d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ee7\u7eed\u770bidx_name_birthday_city\u7d22\u5f15\uff0c\u5982\u679c\u53ea\u770bname\u4e00\u5217\u7684\u8bdd\uff0c\u6240\u6709\u8bb0\u5f55\u90fd\u662f\u6309\u7167name\u7d22\u5f15\u5217\u7684\u503c\u4ece\u5c0f\u5230\u5927\u7684\u987a\u5e8f\u6392\u597d\u5e8f\u7684\uff0c\u8fd9\u5c31\u6781\u5927\u7684\u65b9\u4fbf\u4e86\u6211\u4eec\uff0c\u5728name\u503c\u7684\u67d0\u4e2a\u8303\u56f4\u5185\u67e5\u627e\u76ee\u6807\u8bb0\u5f55\uff0c\u6bd4\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name &gt; 'aq' AND name &lt; 'ww';<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728idx_name_birthday_city B+\u6811\u7d22\u5f15\u4e2d\uff0c\u5176\u67e5\u627e\u8fc7\u7a0b\u5927\u81f4\u5982\u4e0b:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u627e\u5230 name \u503c\u4e3a aq \u7684\u6700\u540e\u4e00\u6761\u8bb0\u5f55A\u3002<\/li>\n\n\n\n<li>\u627e\u5230 name \u503c\u4e3a ww \u7684\u7b2c\u4e00\u6761\u8bb0\u5f55B\u3002<\/li>\n\n\n\n<li>\u53d6\u51fa\uff08A, B\uff09\u8303\u56f4\u7684\u6240\u6709\u8bb0\u5f55\uff0c\u5e76\u6839\u636e\u8bb0\u5f55\u4e2d\u7684\u4e3b\u952e\u503c\u56de\u8868<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u7531\u4e8e\u6240\u6709\u8bb0\u5f55\u90fd\u662f\u7531\u94fe\u8868\u8fde\u8d77\u6765\u7684\uff08\u9875\u5185\u7684\u8bb0\u5f55\u6709\u5e8f\uff0c\u6570\u636e\u9875\u4e4b\u95f4\u7528\u53cc\u94fe\u8868\u8fde\u63a5\u4e14\u6709\u5e8f\uff09\uff0c\u6240\u4ee5\u4ed6\u4eec\u4e4b\u95f4\u7684\u8bb0\u5f55\u90fd\u53ef\u4ee5\u83b7\u53d6\u5230<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\uff0c\u5982\u679c\u5bf9\u591a\u4e2a\u5217\u540c\u65f6\u8fdb\u884c\u8303\u56f4\u67e5\u627e\u7684\u8bdd\uff0c\u53ea\u6709\u5bf9\u7d22\u5f15\u6700\u5de6\u8fb9\u7684\u90a3\u4e2a\u5217\u8fdb\u884c\u8303\u56f4\u67e5\u627e\u7684\u65f6\u5019\u624d\u80fd\u7528\u5230 B+ \u6811\u7d22\u5f15\u4e2d\u5bf9\u5e94\u7684\u7d22\u5f15\u5217\uff0c\u6bd4\u5982\u4e0b\u9762\u7684SQL\u8bed\u53e5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name &gt; 'a' AND name &lt; 'ww' AND birthday &gt; '2000-01-01';<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u4e0a\u7684\u67e5\u8be2\u53ef\u4ee5\u5206\u6210\u4e24\u4e2a\u90e8\u5206\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u901a\u8fc7\u6761\u4ef6 name > &#8216;a&#8217; AND name &lt; &#8216;ww&#8217; \u6765\u5bf9 name \u8fdb\u884c\u8303\u56f4\uff0c\u67e5\u627e\u7684\u7ed3\u679c\u53ef\u80fd\u6709\u591a\u6761 name\u503c\u4e0d\u540c\u7684\u8bb0\u5f55<\/li>\n\n\n\n<li>\u5bf9\u8fd9\u4e9b name \u503c\u4e0d\u540c\u7684\u8bb0\u5f55\u7ee7\u7eed\u901a\u8fc7 birthday > &#8216;1980-01-01&#8217; \u6761\u4ef6\u7ee7\u7eed\u8fc7\u6ee4<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u4e00\u6765\uff0c\u5bf9\u4e8e\u8054\u5408\u7d22\u5f15 idx_name_birthday_city\u6765\u8bf4\uff0c\u53ea\u80fd\u7528\u5230 name \u5217\u7684\u7d22\u5f15\u90e8\u5206\uff0c\u800c\u7528\u4e0d\u5230 birthday \u7d22\u5f15\u5217\u7684\u90e8\u5206\uff0c\u539f\u56e0\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u53ea\u6709 name \u503c\u76f8\u540c\u7684\u60c5\u51b5\u4e0b\u624d\u80fd\u7528 birthday \u5217\u7684\u503c\u8fdb\u884c\u6392\u5e8f\uff0c<\/li>\n\n\n\n<li>\u800c\u8fd9\u4e2a\u67e5\u8be2\u4e2d\u901a\u8fc7 name \u8fdb\u884c\u8303\u56f4\u67e5 \u627e\u7684\u8bb0\u5f55\u4e2d\u53ef\u80fd\u5e76\u4e0d\u662f\u6309\u7167 birthday \u5217\u8fdb\u884c\u6392\u5e8f\u7684<\/li>\n\n\n\n<li>\u6240\u4ee5\u5728\u641c\u7d22\u6761\u4ef6\u4e2d\u7ee7\u7eed\u4ee5 birthday \u5217\u8fdb\u884c\u67e5\u627e\u65f6\u662f\u7528\u4e0d\u5230 \u8fd9\u4e2aB+\u6811birthday\u7d22\u5f15\u5217\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u7cbe\u786e\u5339\u914d + \u8303\u56f4\u5339\u914d<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u540c\u4e00\u4e2a\u8054\u5408\u7d22\u5f15\u6765\u8bf4\uff0c\u867d\u7136\u6211\u4eec\u4e0a\u9762\u8bf4\uff0c\u5bf9\u591a\u4e2a\u5217\u90fd\u8fdb\u884c\u8303\u56f4\u67e5\u627e\u65f6\u53ea\u80fd\u7528\u5230\u6700\u5de6\u8fb9\u90a3\u4e2a\u7d22\u5f15\u5217\uff0c\u4f46\u662f\u5982\u679c\u5de6\u8fb9\u7684\u5217\u662f\u7cbe \u786e\u67e5\u627e\uff0c\u5219\u53f3\u8fb9\u7684\u5217\u53ef\u4ee5\u8fdb\u884c\u8303\u56f4\u67e5\u627e\uff0c\u6bd4\u5982\u5982\u4e0b\u7684SQL\u8bed\u53e5<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name = 'aq' AND birthday &gt; '2000-01-01' AND birthday\n&lt; '2000-12-31' AND city = '\u5317\u4eac';<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u67e5\u8be2\u53ef\u4ee5\u5206\u6210\u4e09\u4e2a\u90e8\u5206\u6765\u770b\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>name = &#8216;aq&#8217; \uff0c\u5bf9 name \u5217\u8fdb\u884c\u7cbe\u786e\u67e5\u627e\uff0c\u5f53\u7136\u53ef\u4ee5\u4f7f\u7528\u8054\u5408\u7d22\u5f15\u4e86<\/li>\n\n\n\n<li>birthday > &#8216;2000-01-01&#8217; AND birthday&lt; &#8216;2000-12-31&#8217; \u7531\u4e8e name \u5217\u662f\u7cbe\u786e\u67e5\u627e\uff0c\u6240\u4ee5\u6ee1\u8db3 name = &#8216;aq&#8217; \u6761\u4ef6\u7684\u8bb0\u5f55\u4f1a\u518d\u6309\u7167 birthday \u7684\u503c\u8fdb\u884c\u6392\u5e8f\u3002\u6240\u4ee5\u6b64\u65f6 \u5bf9 birthday \u5217\u8fdb\u884c\u8303\u56f4\u67e5\u627e\u662f\u53ef\u4ee5\u7528\u5230\u8054\u5408\u7d22\u5f15birthday\u7d22\u5f15\u5217\u3002<\/li>\n\n\n\n<li>city = &#8216;\u5317\u4eac&#8217;\uff0c\u901a\u8fc7 birthday \u7684\u8303\u56f4\u67e5\u627e\u7684\u8bb0\u5f55\u7684 birthday \u7684\u503c\u53ef\u80fd\u4e0d\u540c\uff0c\u6240\u4ee5\u8fd9\u4e2a\u6761\u4ef6\u65e0\u6cd5\u518d\u5229\u7528 B+ \u6811\u7d22\u5f15\u4e86\uff0c\u53ea\u80fd\u904d\u5386\u4e0a\u4e00\u6b65\u67e5\u8be2\u5f97\u5230\u7684\u8bb0\u5f55\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u7406\uff0c\u4e0b\u8fb9\u7684\u67e5\u8be2\u4e5f\u662f\u53ef\u80fd\u7528\u5230 idx_name_birthday_city\u8054\u5408\u7d22\u5f15\u7684\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name = 'aq' AND birthday = '2002-10-10' AND city like '\u5317%';<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">\u56de\u8868\u7684\u4ee3\u4ef7<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0b\u9762\u6211\u4eec\u4ee5idx_name_birthday_city \u8fd9\u9897B+\u6811\u7d22\u5f15\u4e3a\u4f8b\uff0c\u7814\u7a76\u56de\u8868\u7684\u4ee3\u4ef7\uff0c\u5047\u8bbe\u6709\u5982\u4e0bSQL\u8bed\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name &gt; 'a' AND name &lt; 'ww' <\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8be5\u67e5\u8be2\u7684\u6267\u884c\u5927\u81f4\u53ef\u4ee5\u5206\u4e3a\u4e24\u6b65\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4ece\u7d22\u5f15 idx_name_birthday_city \u5bf9\u5e94\u7684 B+ \u6811\u4e2d\u53d6\u51fa name \u503c\u5728 a\uff5e ww\u4e4b\u95f4\u7684\u8bb0\u5f55<\/li>\n\n\n\n<li>\u56e0\u4e3a\u4f7f\u7528select * \u6240\u4ee5\u8fd8\u9700\u8981\u6839\u636e\u4e0a\u4e00\u6b65\u83b7\u5f97\u7684\u6bcf\u4e00\u6761\u8bb0\u5f55\u7684\u4e3b\u952e\u503c\u56de\u8868\uff0c\u67e5\u8be2\u51fa\u5b8c\u6574\u7684\u884c\u6570\u636e<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8eInnoDB\u5b58\u50a8\u5f15\u64ce\u6765\u8bf4\uff0c\u7d22\u5f15\u4e2d\u7684\u9875\u6570\u636e\u90fd\u5b58\u653e\u5728\u78c1\u76d8\u7684\u6587\u4ef6\u4e2d\uff0c\u540c\u65f6\uff0cB+\u6811\u7684\u9875\u8282\u70b9\u4f1a\u4f7f\u7528\u53cc\u5411\u94fe\u8868\u8fde\u63a5\u8d77\u6765\uff0c\u9875\u4e0e\u9875\u4e4b\u95f4\u53ef\u4ee5\u4e0d\u5fc5\u7d27\u90bb\u3002\u4f46\u662f\u5728\u5b9e\u9645\u5b9e\u73b0\u4e2d\uff0cInnoDB\u8fd8\u662f\u4f1a\u5c3d\u53ef\u80fd\u7684\u8ba9\u4e00\u9897B+\u6811\u7684\u53f6\u5b50\u8282\u70b9\u7269\u7406\u7d27\u90bb\u3002\u800c\u53f6\u5b50\u8282\u70b9\u672c\u8eab\u6309\u7167name\u5217\u6392\u5e8f\uff0c\u8fd9\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u8bfb\u53d6name\u503c\u5728(&#8216;a&#8217;, &#8216;ww&#8217;)\u8303\u56f4\u5185\u7684\u8bb0\u5f55\u65f6\uff0c\u6211\u4eec\u6240\u8bfb\u53d6\u7684\u9875\u9762\u5728\u78c1\u76d8\u4e0a\u4e5f\u662f\u5c3d\u53ef\u80fd\u7d27\u90bb\u7684\uff0c\u8fd9\u610f\u5473\u7740\u5728\u626b\u63cf\u4e8c\u7ea7\u7d22\u5f15idx_name_birthday_city (&#8216;a&#8217;, &#8216;ww&#8217;)\u65f6\uff0c\u6267\u884c\u7684IO\u5927\u90e8\u5206\u90fd\u662f\u987a\u5e8fIO\uff0c\u76f8\u5bf9\u6765\u8bf4IO\u4ee3\u4ef7\u4f1a\u5c0f\u4e00\u4e9b\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\uff0c\u5728(&#8216;a&#8217;, &#8216;ww&#8217;)\u5185\u7684\u4e3b\u952e\u503c\uff0c\u5374\u662f\u6beb\u65e0\u89c4\u5f8b\u53ef\u8a00\u7684\uff0c\u56e0\u6b64\u6267\u884c\u56de\u8868\u64cd\u4f5c\u65f6\uff0c\u4f46\u662f\u7531\u4e8e\u4e3b\u952e\u503c\u4e0d\u8fde\u7eed\uff0c\u56e0\u6b64\u5176\u9875\u9762\u6240\u5728\u7684\u4f4d\u7f6e\u53ef\u80fd\u9875\u6beb\u65e0\u89c4\u5f8b\uff0c\u56e0\u6b64\u4f1a\u9020\u6210\u5927\u91cf\u7684\u968f\u673aIO\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-68-1024x1012.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1012\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-68-1024x1012.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-394\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-1024x692.jpeg'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"692\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-1024x692.jpeg\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-390\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u987a\u5e8fI\/O\u6bd4\u968f\u673aI\/O\u7684\u6027\u80fd\u9ad8\u5f88\u591a\uff0c\u6240\u4ee5\u6b65\u9aa41\u7684\u76f8\u5bf9\u8f83\u5feb\uff0c\u800c\u6b65\u9aa42\u76f8\u5bf9\u8f83\u6162\uff0c\u6240\u4ee5\u8fd9\u4e2a\u4f7f\u7528\u7d22\u5f15 idx_name_birthday_city\u7684\u67e5\u8be2\u6709\u8fd9\u4e48\u4e24\u4e2a\u7279\u70b9\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4f1a\u4f7f\u7528\u5230\u4e24\u4e2aB+ \u6811\u7d22\u5f15\uff0c\u4e00\u4e2a\u4e8c\u7ea7\u7d22\u5f15\uff0c\u4e00\u4e2a\u805a\u7c07\u7d22\u5f15\u3002<\/li>\n\n\n\n<li>\u8bbf\u95ee\u4e8c\u7ea7\u7d22\u5f15\u4f7f\u7528 \u987a\u5e8fI\/O \uff0c\u8bbf\u95ee\u805a\u7c07\u7d22\u5f15\u4f7f\u7528 \u968f\u673aI\/O<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u9700\u8981\u56de\u8868\u7684\u8bb0\u5f55\u8d8a\u591a\uff0c\u4f7f\u7528\u4e8c\u7ea7\u7d22\u5f15\u7684\u6027\u80fd\u5c31\u8d8a\u4f4e<\/strong>\uff0c\u751a\u81f3\u5f53\u56de\u8868\u64cd\u4f5c\u5f88\u591a\u7684\u65f6\u5019\uff0c\u67e5\u8be2\u4f18\u5316\u5668\u5b81\u613f\u8ba9\u67d0\u4e9b\u67e5\u8be2\u4f7f\u7528\u5168\u8868\u626b\u63cf\u4e5f\u4e0d\u4f7f\u7528 \u4e8c\u7ea7\u7d22\u5f15 \u3002\u6bd4 \u65b9\u8bf4 name \u503c\u5728 \uff08a\uff5e ww\uff09\u4e4b\u95f4\u7684\u7528\u6237\u8bb0\u5f55\u6570\u91cf\u5360\u5168\u90e8\u8bb0\u5f55\u6570\u91cf90%\u4ee5\u4e0a\uff0c\u90a3\u4e48\u5982\u679c\u4f7f\u7528 idx_name_birthday_city \u7d22\u5f15\u7684\u8bdd\uff0c\u670990%\u591a\u7684 id \u503c\u9700\u8981\u56de\u8868\uff0c\u8fd8\u4e0d\u5982\u76f4\u63a5\u53bb \u626b\u63cf\u805a\u7c07\u7d22\u5f15\uff08\u4e5f\u5c31\u662f\u5168\u8868\u626b\u63cf)\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u90a3\u4ec0\u4e48\u65f6\u5019\u91c7\u7528\u5168\u8868\u626b\u63cf\u7684\u65b9\u5f0f\uff0c\u4ec0\u4e48\u65f6\u5019\u4f7f\u7528\u91c7\u7528 \u4e8c\u7ea7\u7d22\u5f15 + \u56de\u8868 \u7684\u65b9\u5f0f\u53bb\u6267\u884c\u67e5\u8be2\u5462\uff1f\u8fd9\u662f\u7531\u67e5\u8be2\u4f18\u5316\u5668\u51b3\u5b9a\u7684\uff0c\u67e5\u8be2\u4f18\u5316\u5668\u4f1a\u4e8b\u5148\u5bf9\u8868\u4e2d\u7684\u8bb0\u5f55\u8ba1\u7b97\u4e00\u4e9b\u7edf\u8ba1\u6570\u636e\uff0c\u7136\u540e\u518d\u5229\u7528\u8fd9\u4e9b\u7edf\u8ba1\u6570\u636e\u6839\u636e\u67e5\u8be2\u7684\u6761\u4ef6\u6765\u8ba1\u7b97\u4e00\u4e0b\u9700\u8981\u56de\u8868\u7684\u8bb0\u5f55\u6570\uff0c\u9700\u8981\u56de\u8868\u7684\u8bb0\u5f55\u6570\u8d8a\u591a\uff0c\u5c31\u8d8a\u503e\u5411\u4e8e\u4f7f\u7528\u5168\u8868\u626b\u63cf\uff0c\u53cd\u4e4b\u503e\u5411\u4e8e\u4f7f\u7528 \u4e8c\u7ea7\u7d22 \u5f15 + \u56de\u8868 \u7684\u65b9\u5f0f\u3002\u5f53\u7136\u4f18\u5316\u5668\u505a\u7684\u5206\u6790\u5de5\u4f5c\u4e0d\u4ec5\u4ec5\u662f\u8fd9\u4e48\u7b80\u5355\uff0c\u4f46\u662f\u5927\u81f4\u5982\u6b64\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c\u9650\u5236\u67e5\u8be2\u83b7\u53d6\u8f83\u5c11\u7684\u8bb0\u5f55\uff0c\u4f1a\u8ba9\u4f18\u5316\u5668\u66f4\u503e\u5411\u4e8e\u9009\u62e9\u4f7f\u7528 \u4e8c\u7ea7\u7d22\u5f15 + \u56de\u8868 \u7684\u65b9\u5f0f\u8fdb\u884c\u67e5\u8be2\uff0c\u56e0\u4e3a\u56de\u8868\u7684\u8bb0\u5f55\u8d8a\u5c11\uff0c \u6027\u80fd\u63d0\u5347\u5c31\u8d8a\u9ad8\uff0c\u6bd4\u5982\u8bf4\u4e0a\u8fb9\u7684\u67e5\u8be2\u53ef\u4ee5\u6539\u5199\u6210\u8fd9\u6837\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name &gt; 'a' AND name &lt; 'ww'  LIMIT 10;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6dfb\u52a0\u4e86 LIMIT 10 \u7684\u67e5\u8be2\u66f4\u5bb9\u6613\u8ba9\u4f18\u5316\u5668\u91c7\u7528 \u4e8c\u7ea7\u7d22\u5f15 + \u56de\u8868 \u7684\u65b9\u5f0f\u8fdb\u884c\u67e5\u8be2\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8986\u76d6\u7d22\u5f15<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4e86\u5f7b\u5e95\u544a\u522b \u56de\u8868 \u64cd\u4f5c\u5e26\u6765\u7684\u6027\u80fd\u635f\u8017\uff0c\u6211\u4eec\u5efa\u8bae\uff1a\u6700\u597d\u5728\u67e5\u8be2\u5217\u8868\u91cc\u53ea\u5305\u542b\u7d22\u5f15\u5217\uff0c\u6bd4\u5982\u5982\u4e0bSQL\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT name, birthday, city FROM user WHERE name &gt; 'a' AND name &lt; 'ww'<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u6211\u4eec\u53ea\u67e5\u8be2 name , birthday , city\u8fd9\u4e09\u4e2a\u7d22\u5f15\u5217\u7684\u503c\uff0c\u800c\u5b83\u4eec\u5df2\u7ecf\u88ab\u5305\u542b\u5728idx_name_birthday_city\u7d22\u5f15\u4e2d\uff0c\u6240\u4ee5\u5c31\u4e0d\u5fc5\u5230\u805a\u7c07\u7d22\u5f15\u56de\u8868\uff0c\u5c31\u51cf\u5c11\u4e86\u56de\u8868\u64cd\u4f5c\u5e26\u6765\u7684\u6027\u80fd\u635f\u8017\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u628a\u8fd9\u79cd\u53ea\u9700\u8981\u7528\u5230\u4e8c\u7ea7\u7d22\u5f15\u7684\u67e5\u8be2\u65b9\u5f0f\u79f0\u4e3a \u7d22\u5f15\u8986\u76d6\u3002\u5f53\u7136\uff0c\u5982\u679c\u4e1a\u52a1\u9700\u8981\u67e5\u8be2\u51fa\u7d22\u5f15\u4ee5\u5916\u7684\u5217\uff0c\u90a3\u8fd8\u662f\u4ee5\u4fdd\u8bc1\u4e1a\u52a1\u9700\u6c42\u4e3a\u91cd\u3002\u4f46\u662f\u6211\u4eec\u5f88<strong>\u4e0d\u9f13\u52b1\u7528 * \u53f7\u4f5c\u4e3a\u67e5\u8be2\u5217\u8868<\/strong>\uff0c\u6700\u597d\u628a\u6211\u4eec\u9700\u8981\u67e5\u8be2\u7684\u5217\u4f9d\u6b21\u6807\u660e\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5728\u6392\u5e8f\u4e2d\u7684\u4f7f\u7528<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5728\u5199\u67e5\u8be2\u8bed\u53e5\u7684\u65f6\u5019\u7ecf\u5e38\u9700\u8981\u5bf9\u67e5\u8be2\u51fa\u6765\u7684\u8bb0\u5f55\u901a\u8fc7 ORDER BY \u5b50\u53e5\u6309\u7167\u67d0\u79cd\u89c4\u5219\u8fdb\u884c\u6392\u5e8f\u3002\u4e00\u822c\u60c5\u51b5\u4e0b\uff0c \u6211\u4eec\u53ea\u80fd\u628a\u8bb0\u5f55\u90fd\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\uff0c\u518d\u7528\u4e00\u4e9b\u6392\u5e8f\u7b97\u6cd5\uff0c\u6bd4\u5982\u5feb\u901f\u6392\u5e8f\u3001\u5f52\u5e76\u6392\u5e8f\u7b49\u7b49\u6392\u5e8f\u7b97\u6cd5\u5728\u5185\u5b58\u4e2d\u5bf9\u8fd9\u4e9b\u8bb0\u5f55\u8fdb\u884c\u6392\u5e8f\uff0c\u6709\u7684\u65f6\u5019\u53ef\u80fd\u67e5\u8be2\u7684\u7ed3\u679c\u96c6\u592a\u5927\u4ee5\u81f3\u4e8e\u4e0d\u80fd\u5728\u5185\u5b58\u4e2d\u8fdb\u884c\u6392\u5e8f\u7684\u8bdd\uff0c\u8fd8\u53ef\u80fd\u6682\u65f6\u501f\u52a9\u78c1\u76d8\u7684\u7a7a\u95f4\u6765\u5b58\u653e\u4e2d\u95f4\u7ed3\u679c\uff0c\u6392\u5e8f\u64cd\u4f5c\u5b8c\u6210\u540e\u518d\u628a\u6392\u597d\u5e8f\u7684\u7ed3\u679c\u96c6\u8fd4\u56de\u5230\u5ba2\u6237\u7aef\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728 MySQL\u4e2d\uff0c\u628a\u8fd9\u79cd\u5728\u5185\u5b58\u4e2d\u6216\u8005\u78c1\u76d8\u4e0a\u8fdb\u884c\u6392\u5e8f\u7684\u65b9\u5f0f\u7edf\u79f0\u4e3a\u6587\u4ef6\u6392\u5e8f\uff08\u82f1\u6587\u540d\uff1a filesort \uff09\uff0c\u8ddf\u6587\u4ef6\u8fd9\u4e2a\u8bcd\u513f\u4e00\u6cbe\u8fb9\u513f\uff0c\u5c31\u4f1a\u4f7f\u5f97\u8fd9\u4e9b\u6392\u5e8f\u64cd\u4f5c\u975e\u5e38\u6162\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\u5982\u679cORDER BY\u5b50\u53e5\u91cc\u4f7f\u7528\u5230\u4e86\u6211\u4eec\u7684\u7d22\u5f15\u5217\uff0c\u5c31\u6709\u53ef\u80fd\u7701\u53bb\u5728\u5185\u5b58\u6216\u6587\u4ef6\u4e2d\u6392\u5e8f\u7684\u6b65\u9aa4\uff0c\u6bd4\u5982\u4e0b\u8fb9\u8fd9\u4e2a\u7b80\u5355\u7684\u67e5\u8be2\u8bed\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user ORDER BY name, birthday, city LIMIT 10;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u67e5\u8be2\u7684\u7ed3\u679c\u96c6\u9700\u8981\u5148\u6309\u7167 name \u503c\u6392\u5e8f\uff0c\u5982\u679c\u8bb0\u5f55\u7684 name \u503c\u76f8\u540c\uff0c\u5219\u9700\u8981\u6309\u7167 birthday \u6765\u6392\u5e8f\uff0c\u5982\u679c birthday \u7684\u503c\u76f8\u540c\uff0c\u5219\u9700\u8981\u6309\u7167 city\u6392\u5e8f\u3002\u8fd9\u4e0d\u662f\u548c\u6211\u4eec\u7684 idx_name_birthday_city\u7d22\u5f15\u7684\u7684\u6392\u5e8f\u89c4\u5219\u76f8\u540c\u5417\uff0c\u6240\u4ee5\u76f4\u63a5\u4ece\u7d22\u5f15\u4e2d\u63d0\u53d6\u6570\u636e\uff0c\u7136\u540e\u8fdb\u884c\u56de\u8868\u64cd\u4f5c\u53d6\u51fa\u8be5\u7d22\u5f15\u4e2d\u4e0d\u5305\u542b\u7684\u5217\u5c31\u597d\u4e86\uff0c\u6240\u4ee5\u5927\u5927\u63d0\u5347\u4e86\u6392\u5e8f\u6548\u7387<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9700\u8981\u8bf4\u660e\u7684\u662f\uff0c\u5bf9\u4e8e\u6392\u5e8f\u800c\u8a00\uff0c\u4e4b\u524d\u8ba8\u8bba\u5bf9\u4e8e\u91c7\u7528\u5168\u8868\u626b\u63cf \u8fd8\u662f\u4e8c\u7ea7\u7d22\u5f15 + \u56de\u8868\u7684\u65b9\u5f0f\u8fdb\u884c\u67e5\u8be2\u7684\u8ba8\u8bba\u5728\u6392\u5e8f\u4e2d\u4ecd\u7136\u9002\u7528\u3002\u7531\u4e8e\u4e0a\u9762\u7684\u67e5\u8be2\u5217\u8868\u662f * \uff0c\u6240\u4ee5\u5982\u679c\u4f7f\u7528\u4e8c\u7ea7\u7d22\u5f15\u8fdb\u884c\u6392\u5e8f\u7684\u8bdd\uff0c\u9700\u8981\u628a\u6392\u5e8f\u5b8c\u7684\u4e8c\u7ea7\u7d22\u5f15\u8bb0\u5f55\u5168\u90e8\u8fdb\u884c\u56de\u8868\u64cd\u4f5c\uff0c\u8fd9\u6837\u64cd\u4f5c\u7684\u6210\u672c\u8fd8\u4e0d\u5982\u76f4\u63a5\u904d\u5386\u805a\u7c07\u7d22\u5f15\u7136\u540e\u518d\u8fdb\u884c\u6587\u4ef6\u6392\u5e8f\uff08 filesort \uff09\u4f4e\uff0c\u6240\u4ee5\u4f18\u5316\u5668\u53ef\u80fd\u4f1a\u503e\u5411\u4e8e\u4f7f\u7528\u5168\u8868\u626b\u63cf\u7684\u65b9\u5f0f\u6267\u884c\u67e5\u8be2\u3002\u5982\u679c\u6211\u4eec\u52a0\u4e86 LIMIT \u5b50\u53e5<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8054\u5408\u7d22\u5f15\u6ce8\u610f\u4e8b\u9879<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6211\u4eec\u60f3\u5728\u6392\u5e8f\u7684\u65f6\u5019\u4f7f\u7528\u5230\u8054\u5408\u7d22\u5f15\uff0c\u6211\u4eec\u5c31\u4e00\u5b9a\u8981\u6ce8\u610fORDER BY \u7684\u5b50\u53e5\u540e\u8fb9\u7684\u5217\u7684\u987a\u5e8f\u4e5f\u5fc5\u987b\u6309\u7167\u7d22\u5f15\u5217\u7684\u987a\u5e8f\u7ed9\u51fa\uff0c\u5982\u679c\u7ed9\u51fa ORDER BY city, birthday, name \u7684\u987a\u5e8f\uff0c\u90a3\u4e5f\u662f\u7528\u4e0d\u4e86\u8054\u5408\u7d22\u5f15\uff0c\u8fd9\u79cd\u98a0\u5012\u987a\u5e8f\u5c31\u4e0d\u80fd\u4f7f\u7528\u7d22\u5f15\u7684 \u539f\u56e0\u4e0eB+\u6811\u7684\u6392\u5e8f\u987a\u5e8f\u6709\u5173\u7cfb\uff0c\u8fd9\u5c31\u4e0d\u8d58\u8ff0\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u7406\uff0c ORDER BY name \u3001 ORDER BY name, birthday \u8fd9\u79cd\u5339\u914d\u7d22\u5f15\u5de6\u8fb9\u7684\u5217\u7684\u5f62\u5f0f\u53ef\u4ee5\u4f7f\u7528\u90e8\u5206\u7684 B+ \u6811\u7d22\u5f15\u3002 \u5f53\u67e5\u8be2\u6761\u4ef6\u4e2d\u4f7f\u7528\u4e86\u5bf9\u8054\u5408\u7d22\u5f15\u5de6\u8fb9\u5217\u7684\u7cbe\u786e\u503c\u5339\u914d\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u540e\u8fb9\u7684\u5217\u8fdb\u884c\u6392\u5e8f\uff0c\u6bd4\u5982\u8fd9\u6837\uff1aname, birthday, city<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user WHERE name = 'aq' ORDER BY birthday, city LIMIT 10;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u67e5\u8be2\u80fd\u4f7f\u7528\u8054\u5408\u7d22\u5f15\u8fdb\u884c\u6392\u5e8f\u662f\u56e0\u4e3aname \u5217\u7684\u503c\u76f8\u540c\u7684\u8bb0\u5f55\u662f\u6309\u7167 birthday , city\u6392\u5e8f\u7684\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15\u7684\u60c5\u51b5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u4ee5\u4e0b\u7684\u51e0\u79cd\u60c5\u51b5\u4e0b\uff0c\u5728\u6392\u5e8f\u65f6\u662f\u65e0\u6cd5\u4f7f\u7528\u5230\u7d22\u5f15\u7684<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">ASC DESC\u6df7\u7528<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u4f7f\u7528\u8054\u5408\u7d22\u5f15\u8fdb\u884c\u6392\u5e8f\u7684\u573a\u666f\uff0c\u6211\u4eec\u8981\u6c42\u5404\u4e2a\u6392\u5e8f\u5217\u7684\u6392\u5e8f\u987a\u5e8f\u662f\u4e00\u81f4\u7684\uff0c\u4e5f\u5c31\u662f\u8981\u4e48\u5404\u4e2a\u5217\u90fd\u662f ASC \u89c4\u5219 \u6392\u5e8f\uff0c\u8981\u4e48\u90fd\u662f DESC \u89c4\u5219\u6392\u5e8f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e3a\u4ec0\u4e48\u4f1a\u6709\u8fd9\u6837\u7684\u89c4\u5b9a\u5462\uff1f\u8fd9\u4e2a\u8fd8\u5f97\u56de\u5934\u60f3\u60f3\u8fd9\u4e2a idx_name_birthday_city \u8054\u5408\u7d22\u5f15\u4e2d\u8bb0\u5f55\u7684\u6392\u5e8f\u89c4\u5219\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u6309\u7167\u8bb0\u5f55\u7684 name \u5217\u7684\u503c\u8fdb\u884c\u5347\u5e8f\u6392\u5217\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u8bb0\u5f55\u7684 name \u5217\u7684\u503c\u76f8\u540c\uff0c\u518d\u6309\u7167 birthday \u5217\u7684\u503c\u8fdb\u884c\u5347\u5e8f\u6392\u5217\u3002<\/li>\n\n\n\n<li>\u5982\u679c\u8bb0\u5f55\u7684name\u548cbirthday \u5217\u7684\u503c\u76f8\u540c\uff0c\u518d\u6309\u7167 city\u5217\u7684\u503c\u8fdb\u884c\u5347\u5e8f\u6392\u5217\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u67e5\u8be2\u4e2d\u7684\u5404\u4e2a\u6392\u5e8f\u5217\u7684\u6392\u5e8f\u987a\u5e8f\u662f\u4e00\u81f4\u7684\uff0c\u6bd4\u65b9\u8bf4\u4e0b\u8fb9\u4e24\u8fd9\u79cd\u60c5\u51b5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/ \u60c5\u51b51\nSELECT * FROM user ORDER BY name, birthday LIMIT 10\n\/\/ \u60c5\u51b52\nSELECT * FROM user ORDER BY name DESC, birthday DESC LIMIT 10<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u60c5\u51b51\u76f4\u63a5\u4ece\u7d22\u5f15\u7684\u6700\u5de6\u8fb9\u5f00\u59cb\u5f80\u53f3\u8bfb10\u884c\u8bb0\u5f55\u5c31\u53ef\u4ee5\u4e86\uff0c\u60c5\u51b52\u76f4\u63a5\u4ece\u7d22\u5f15\u7684\u6700\u53f3\u8fb9\u5f00\u59cb\u5f80\u5de6\u8bfb10\u884c\u8bb0\u5f55\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\u5982\u679c\u6211\u4eec\u67e5\u8be2\u7684\u9700\u6c42\u662f\u5148\u6309\u7167 name \u5217\u8fdb\u884c\u5347\u5e8f\u6392\u5217\uff0c\u518d\u6309\u7167 birthday \u5217\u8fdb\u884c\u964d\u5e8f\u6392\u5217\u7684\u8bdd\uff0c\u6bd4\u5982\u5982\u4e0b\u67e5\u8be2\u8bed\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user ORDER BY name, birthday DESC LIMIT 10<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u5982\u679c\u4f7f\u7528\u7d22\u5f15\u6392\u5e8f\u7684\u8bdd\u8fc7\u7a0b\u5c31\u662f\u8fd9\u6837\u7684\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5148\u4ece\u7d22\u5f15\u7684\u6700\u5de6\u8fb9\u786e\u5b9a name \u5217\u6700\u5c0f\u7684\u503c\uff0c\u7136\u540e\u627e\u5230 name \u5217\u7b49\u4e8e\u8be5\u503c\u7684\u6240\u6709\u8bb0\u5f55\uff0c\u7136\u540e\u4ece name \u5217\u7b49\u4e8e\u8be5\u503c \u7684\u6700\u53f3\u8fb9\u7684\u90a3\u6761\u8bb0\u5f55\u5f00\u59cb\u5f80\u5de6\u627e10\u6761\u8bb0\u5f55\u3002<\/li>\n\n\n\n<li>\u5982\u679c name \u5217\u7b49\u4e8e\u6700\u5c0f\u7684\u503c\u7684\u8bb0\u5f55\u4e0d\u8db310\u6761\uff0c\u518d\u4ece\u5de6\u7ee7\u7eed\u5f80\u53f3\u627e name \u503c\u7b2c\u4e8c\u5c0f\u7684\u8bb0\u5f55\uff0c\u91cd\u590d\u4e0a\u8fb9\u90a3\u4e2a\u8fc7\u7a0b\uff0c\u76f4 \u5230\u627e\u523010\u6761\u8bb0\u5f55\u4e3a\u6b62\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u4e0d\u80fd\u9ad8\u6548\u4f7f\u7528\u7d22\u5f15\uff0c\u800c\u8981\u91c7\u53d6\u66f4\u590d\u6742\u7684\u7b97\u6cd5\u53bb\u4ece\u7d22\u5f15\u4e2d\u53d6\u6570\u636e\uff0c\u8fd8\u4e0d\u5982\u76f4\u63a5\u6587\u4ef6\u6392\u5e8f\u6765\u7684\u5feb\uff01<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6392\u5e8f\u5217\u5305\u542b\u975e\u540c\u4e00\u4e2a\u7d22\u5f15\u7684\u5217<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u65f6\u5019\u7528\u6765\u6392\u5e8f\u7684\u591a\u4e2a\u5217\u4e0d\u662f\u4e00\u4e2a\u7d22\u5f15\u91cc\u7684\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e5f\u4e0d\u80fd\u4f7f\u7528\u7d22\u5f15\u8fdb\u884c\u6392\u5e8f\uff0c\u6bd4\u5982\u5982\u4e0bSQL\u8bed\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user ORDER BY name, point LIMIT 10<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">name \u548c point \u5e76\u4e0d\u5c5e\u4e8e\u4e00\u4e2a\u8054\u5408\u7d22\u5f15\u4e2d\u7684\u5217\uff0c\u6240\u4ee5\u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15\u8fdb\u884c\u6392\u5e8f\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u6392\u5e8f\u5217\u4f7f\u7528\u4e86\u590d\u6742\u7684\u8868\u8fbe\u5f0f<\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u60f3\u4f7f\u7528\u7d22\u5f15\u8fdb\u884c\u6392\u5e8f\u64cd\u4f5c\uff0c\u5fc5\u987b\u4fdd\u8bc1\u7d22\u5f15\u5217\u662f\u4ee5\u5355\u72ec\u5217\u7684\u5f62\u5f0f\u51fa\u73b0\uff0c\u800c\u4e0d\u662f\u4fee\u9970\u8fc7\u7684\u5f62\u5f0f\uff0c\u6bd4\u5982\u5982\u4e0bSQL\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user ORDER BY UPPER(name) LIMIT 10;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u7684UPPER\u662fMySQL\u4e2d\u7684\u51fd\u6570\uff0c\u4f7f\u7528\u4e86 UPPER \u51fd\u6570\u4fee\u9970\u8fc7\u7684\u5217\u5c31\u4e0d\u662f\u5355\u72ec\u7684\u5217\u5566\uff0c\u8fd9\u6837\u5c31\u65e0\u6cd5\u4f7f\u7528\u7d22\u5f15\u8fdb\u884c\u6392\u5e8f\u5566\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5728\u5206\u7ec4\u4e2d\u7684\u4f7f\u7528<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6709\u65f6\u5019\u6211\u4eec\u4e3a\u4e86\u65b9\u4fbf\u7edf\u8ba1\u8868\u4e2d\u7684\u4e00\u4e9b\u4fe1\u606f\uff0c\u4f1a\u628a\u8868\u4e2d\u7684\u8bb0\u5f55\u6309\u7167\u67d0\u4e9b\u5217\u8fdb\u884c\u5206\u7ec4\u3002\u6bd4\u5982\u4e0b\u8fb9\u8fd9\u4e2a\u5206\u7ec4\u67e5\u8be2\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code> SELECT name, birthday, city, COUNT(*) FROM user GROUP BY name, birthday, city<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a\u67e5\u8be2\u8bed\u53e5\u76f8\u5f53\u4e8e\u505a\u4e863\u6b21\u5206\u7ec4\u64cd\u4f5c\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5148\u628a\u8bb0\u5f55\u6309\u7167 name \u503c\u8fdb\u884c\u5206\u7ec4\uff0c\u6240\u6709 name \u503c\u76f8\u540c\u7684\u8bb0\u5f55\u5212\u5206\u4e3a\u4e00\u7ec4\u3002<\/li>\n\n\n\n<li>\u5c06\u6bcf\u4e2a name \u503c\u76f8\u540c\u7684\u5206\u7ec4\u91cc\u7684\u8bb0\u5f55\u518d\u6309\u7167 birthday \u7684\u503c\u8fdb\u884c\u5206\u7ec4\uff0c\u5c06 birthday \u503c\u76f8\u540c\u7684\u8bb0\u5f55\u653e\u5230\u4e00\u4e2a\u5c0f \u5206\u7ec4\u91cc\uff0c\u6240\u4ee5\u770b\u8d77\u6765\u5c31\u50cf\u5728\u4e00\u4e2a\u5927\u5206\u7ec4\u91cc\u53c8\u5316\u5206\u4e86\u597d\u591a\u5c0f\u5206\u7ec4\u3002<\/li>\n\n\n\n<li>\u518d\u5c06\u4e0a\u4e00\u6b65\u4e2d\u4ea7\u751f\u7684\u5c0f\u5206\u7ec4\u6309\u7167 city\u7684\u503c\u5206\u6210\u66f4\u5c0f\u7684\u5206\u7ec4\uff0c\u6240\u4ee5\u6574\u4f53\u4e0a\u770b\u8d77\u6765\u5c31\u50cf\u662f\u5148\u628a\u8bb0\u5f55\u5206 \u6210\u4e00\u4e2a\u5927\u5206\u7ec4\uff0c\u7136\u540e\u628a \u5927\u5206\u7ec4 \u5206\u6210\u82e5\u5e72\u4e2a \u5c0f\u5206\u7ec4 \uff0c\u7136\u540e\u628a\u82e5\u5e72\u4e2a \u5c0f\u5206\u7ec4 \u518d\u7ec6\u5206\u6210\u66f4\u591a\u7684 \u5c0f\u5c0f\u5206\u7ec4 \u3002<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\u9488\u5bf9\u90a3\u4e9b \u5c0f\u5c0f\u5206\u7ec4 \u8fdb\u884c\u7edf\u8ba1\uff0c\u6bd4\u5982\u5728\u6211\u4eec\u8fd9\u4e2a\u67e5\u8be2\u8bed\u53e5\u4e2d\u5c31\u662f\u7edf\u8ba1\u6bcf\u4e2a\u5c0f\u5c0f\u5206\u7ec4 \u5305\u542b\u7684\u8bb0\u5f55\u6761\u6570\u3002\u5982\u679c\u6ca1 \u6709\u7d22\u5f15\u7684\u8bdd\uff0c\u8fd9\u4e2a\u5206\u7ec4\u8fc7\u7a0b\u5168\u90e8\u9700\u8981\u5728\u5185\u5b58\u91cc\u5b9e\u73b0\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u6709\u4e86\u7d22\u5f15\u7684\u8bdd\uff0c\u5982\u679c\u6070\u5de7\u8fd9\u4e2a\u5206\u7ec4\u987a\u5e8f\u53c8\u548c\u6211\u4eec\u7684 B+\u6811\u4e2d\u7684\u7d22\u5f15\u5217\u7684\u987a\u5e8f\u662f\u4e00\u81f4\u7684\uff0c\u800c\u6211\u4eec\u7684 B+ \u6811\u7d22\u5f15\u53c8\u662f\u6309\u7167\u7d22\u5f15\u5217\u6392\u597d\u5e8f\u7684\uff0c\u6240\u4ee5\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528 B+ \u6811\u7d22\u5f15\u8fdb\u884c\u5206\u7ec4\u3002 \u548c\u4f7f\u7528 B+ \u6811\u7d22\u5f15\u8fdb\u884c\u6392\u5e8f\u5176\u5b9e\u662f\u4e00\u4e2a\u9053\u7406\uff0c\u5206\u7ec4\u5217\u7684\u987a\u5e8f\u4e5f\u9700\u8981\u548c\u7d22\u5f15\u5217\u7684\u987a\u5e8f\u4e00\u81f4\uff0c\u4e5f\u53ef\u4ee5\u53ea\u4f7f\u7528\u7d22\u5f15\u5217\u4e2d\u5de6\u8fb9 \u7684\u5217\u8fdb\u884c\u5206\u7ec4\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7d22\u5f15\u7684\u8bed\u6cd5<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728MySQL\u4e2d\u6211\u4eec\u53ef\u4ee5\u5b9a\u4e49\u5355\u5217\u7d22\u5f15\uff0c\u4e5f\u53ef\u4ee5\u5b9a\u4e49\u5305\u542b\u591a\u5217\u7684\u7d22\u5f15(\u5373\u8054\u5408\u7d22\u5f15)\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5728\u521b\u5efa\u8868\u7684\u65f6\u5019\u5b9a\u4e49\u7d22\u5f15\uff0c\u53ef\u4ee5\u57fa\u4e8e\u5982\u4e0b\u8bed\u6cd5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE \u8868\u540d (\n    ...\n\t&#91;UNIQUE] INDEX \u7d22\u5f15\u540d\u79f0 (column1, column2, ...)\n    ...\n)\n# \u7d22\u5f15\u540d\u79f0\u6211\u4eec\u4e60\u60ef\u4e0a\u901a\u5e38\u5b9a\u4f4didx_\u7d22\u5f15\u5217\u540d1_\u7d22\u5f15\u5217\u540d2...\n# \u62ec\u53f7\u4e2d\u7684\u7d22\u5f15\u5217\u53ef\u4ee5\u662f\u4e00\u5217\u4e5f\u53ef\u4ee5\u662f\u591a\u5217\uff0c\u5982\u679c\u662f\u591a\u5217\uff0c\u5217\u540d\u4e4b\u95f4\u4ee5,\u5206\u9694<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5728\u5b9a\u4e49\u7d22\u5f15\u65f6\u6dfb\u52a0\u4e86UNIQUE\u5173\u952e\u5b57\uff0c\u5219\u8be5\u7d22\u5f15\u5c31\u53d8\u6210\u4e86\u552f\u4e00\u7d22\u5f15\uff0c\u6709\u5982\u4e0b\u6548\u679c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u7d22\u5f15\u5217\u662f\u5355\u5217\u7684\u8bdd\uff0c\u90a3\u4e48\u8be5\u5355\u5217\u7684\u503c\u5728\u7d22\u5f15\u4e2d\u4e0d\u80fd\u91cd\u590d\uff08\u5176\u5b9e\u4e5f\u5c31\u9650\u5b9a\u4e86\u5728\u8868\u4e2d\u4e0d\u80fd\u91cd\u590d\uff09<\/li>\n\n\n\n<li>\u5982\u679c\u7d22\u5f15\u5217\u662f\u591a\u5217\uff0c\u5373\u8054\u5408\u7d22\u5f15\uff0c\u90a3\u4e48\u5404\u7d22\u5f15\u5217\u7684\u53d6\u503c\u7ec4\u5408\u4e0d\u80fd\u91cd\u590d\uff08\u5176\u5b9e\u4e5f\u5c31\u9650\u5b9a\u4e86\u5728\u8868\u4e2d\u8fd9\u4e9b\u5217\u7684\u53d6\u503c\u7ec4\u5408\u4e0d\u80fd\u91cd\u590d\uff09<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u4e5f\u53ef\u4ee5\u5728\u521b\u5efa\u8868\u4e4b\u540e\uff0c\u901a\u8fc7\u4fee\u6539\u8868\u7ed3\u6784\uff0c\u7ed9\u8868\u6dfb\u52a0\u7d22\u5f15<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code># \u6dfb\u52a0\u7d22\u5f15\nALTER TABLE \u8868\u540d ADD INDEX \u7d22\u5f15\u540d(\u5217\u540d1,\u5217\u540d2, ...);\n# \u6dfb\u52a0\u552f\u4e00\u7d22\u5f15\nALTER TABLE \u8868\u540d ADD UNIQUE \u7d22\u5f15\u540d(\u5217\u540d1,\u5217\u540d2, ...);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u4e5f\u53ef\u4ee5\u5728\u521b\u5efa\u7d22\u5f15\u540e\u5220\u9664\u7d22\u5f15:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ALTER TABLE \u8868\u540d DROP INDEX \u7d22\u5f15\u540d;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u5982\u4f55\u6311\u9009\u7d22\u5f15<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u5355\u5217\u7d22\u5f15\u7684\u67e5\u8be2\u548c\u4f7f\u7528\u90fd\u6bd4\u8f83\u7b80\u5355\uff0c\u5927\u5bb6\u53ea\u8981\u7406\u89e3\u4e86B+\u6811\u7d22\u5f15\u5373\u53ef\u638c\u63e1\uff0c\u6240\u4ee5\u6211\u4eec\u4e3b\u8981\u662f\u9488\u5bf9\u8054\u5408\u7d22\u5f15\u7684\u5728MySQL\u4f7f\u7528\u8fdb\u884c\u4e86\u4ecb\u7ecd\uff0c\u63a5\u4e0b\u6765\u6211\u4eec\u91cd\u70b9\u7814\u7a76\uff0c\u5728\u5b9e\u9645\u5f00\u53d1\u65f6\u7d22\u5f15\u7684\u4f7f\u7528\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u53ea\u4e3a\u7279\u6b8a\u76ee\u7684\u521b\u5efa\u7d22\u5f15<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ea\u4e3a\u7528\u4e8e\u641c\u7d22\u3001\u6392\u5e8f\u6216\u5206\u7ec4\u7684\u5217\u521b\u5efa\u7d22\u5f15\uff0c\u4e5f\u5c31\u662f\u8bf4\u53ea\u4e3a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51fa\u73b0\u5728 WHERE \u5b50\u53e5\u4e2d\u7684\u5217<\/li>\n\n\n\n<li>\u8fde\u63a5\u5b50\u53e5\u4e2d\u7684\u8fde\u63a5\u5217 (\u8fde\u63a5\u7684\u65f6\u5019\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5230\u7d22\u5f15) join on<\/li>\n\n\n\n<li>\u6216\u8005\u51fa\u73b0\u5728 ORDER BY \u6216 GROUP BY \u5b50\u53e5\u4e2d\u7684 \u5217\u521b\u5efa\u7d22\u5f15\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u51fa\u73b0\u5728\u67e5\u8be2\u5217\u8868\u4e2d\u7684\u5217\u5c31\u6ca1\u5fc5\u8981\u5efa\u7acb\u7d22\u5f15\u4e86\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT birthday, city FROM user WHERE name = 'aq';<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u50cf\u67e5\u8be2\u5217\u8868\u4e2d\u7684 birthday \u3001 city\u8fd9\u4e24\u4e2a\u5217\u5c31\u4e0d\u9700\u8981\u5efa\u7acb\u7d22\u5f15\uff0c\u6211\u4eec\u53ea\u9700\u8981\u4e3a\u51fa\u73b0\u5728 WHERE \u5b50\u53e5\u4e2d\u7684 name \u5217\u521b\u5efa\u7d22\u5f15\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u8003\u8651\u5217\u7684\u57fa\u6570<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5217\u7684\u57fa\u6570\u6307\u7684\u662f\u67d0\u4e00\u5217\u4e2d\u4e0d\u91cd\u590d\u6570\u636e\u7684\u4e2a\u6570\uff0c\u6bd4\u65b9\u8bf4\u67d0\u4e2a\u5217\u5305\u542b\u503c 2, 5, 8, 2, 5, 8, 2, 5, 8 \uff0c\u867d\u7136\u6709 9 \u6761 \u8bb0\u5f55\uff0c\u4f46\u8be5\u5217\u7684\u57fa\u6570\u5374\u662f 3 \u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5728\u8bb0\u5f55\u884c\u6570\u4e00\u5b9a\u7684\u60c5\u51b5\u4e0b\uff0c\u5217\u7684\u57fa\u6570\u8d8a\u5927\uff0c\u8be5\u5217\u4e2d\u7684\u503c\u8d8a\u5206\u6563\uff0c\u5217\u7684\u57fa\u6570\u8d8a\u5c0f\uff0c\u8be5\u5217\u4e2d\u7684\u503c\u8d8a\u96c6\u4e2d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u4e2a \u5217\u7684\u57fa\u6570 \u6307\u6807\u975e\u5e38\u91cd\u8981\uff0c\u76f4\u63a5\u5f71\u54cd\u6211\u4eec\u662f\u5426\u80fd\u6709\u6548\u7684\u5229\u7528\u7d22\u5f15\u3002\u5047\u8bbe\u67d0\u4e2a\u5217\u7684\u57fa\u6570\u4e3a 1 \uff0c\u4e5f\u5c31\u662f\u6240\u6709\u8bb0\u5f55\u5728\u8be5\u5217\u4e2d\u7684\u503c\u90fd\u4e00\u6837\uff0c\u90a3\u4e3a\u8be5\u5217\u5efa\u7acb\u7d22\u5f15\u662f\u6ca1\u6709\u7528\u7684\uff0c\u56e0\u4e3a\u6240\u6709\u503c\u90fd\u4e00\u6837\u5c31\u65e0\u6cd5\u6392\u5e8f\uff0c\u65e0\u6cd5\u8fdb\u884c\u5feb\u901f\u67e5\u627e\u4e86. \u800c\u4e14\u5982\u679c\u67d0\u4e2a\u5efa\u7acb\u4e86\u4e8c\u7ea7\u7d22\u5f15\u7684\u5217\u7684\u91cd\u590d\u503c\u7279\u522b\u591a\uff0c\u90a3\u4e48\u4f7f\u7528\u8fd9\u4e2a\u4e8c\u7ea7\u7d22\u5f15\u67e5\u51fa\u7684\u8bb0 \u5f55\u8fd8\u53ef\u80fd\u8981\u505a\u56de\u8868\u64cd\u4f5c\uff0c\u8fd9\u6837\u6027\u80fd\u635f\u8017\u5c31\u66f4\u5927\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u7ed3\u8bba\u5c31\u662f\uff1a\u6700\u597d\u4e3a\u90a3\u4e9b\u5217\u7684\u57fa\u6570\u5927\u7684\u5217\u5efa\u7acb\u7d22\u5f15\uff0c\u4e3a\u57fa\u6570\u592a\u5c0f\u5217\u7684\u5efa\u7acb\u7d22\u5f15\u6548\u679c\u53ef\u80fd\u4e0d\u597d\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7d22\u5f15\u5217\u7684\u7c7b\u578b\u5c3d\u91cf\u5c0f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u5728\u5b9a\u4e49\u8868\u7ed3\u6784\u7684\u65f6\u5019\u8981\u663e\u5f0f\u7684\u6307\u5b9a\u5217\u7684\u7c7b\u578b\uff0c\u4ee5\u6574\u6570\u7c7b\u578b\u4e3a\u4f8b\uff0c\u6709 TINYINT \u3001 MEDIUMINT \u3001 INT \u3001 BIGINT \u8fd9\u4e48\u51e0\u79cd\uff0c\u5b83\u4eec\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u4f9d\u6b21\u9012\u589e\uff0c\u5f53\u7136\uff0c\u8fd9\u51e0\u79cd\u6570\u636e\u7c7b\u578b\u80fd\u8868\u793a\u7684\u6574\u6570\u8303\u56f4\u5f53\u7136\u4e5f\u662f\u4f9d\u6b21\u9012\u589e<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u6211\u4eec\u60f3\u8981\u5bf9\u67d0\u4e2a\u6574\u6570\u5217\u5efa\u7acb\u7d22\u5f15\u7684\u8bdd\uff0c\u5728\u8868\u793a\u7684\u6574\u6570\u8303\u56f4\u5141\u8bb8\u7684\u60c5\u51b5 \u4e0b\uff0c\u5c3d\u91cf\u8ba9\u7d22\u5f15\u5217\u4f7f\u7528\u8f83\u5c0f\u7684\u7c7b\u578b\uff0c\u6bd4\u5982\u6211\u4eec\u80fd\u4f7f\u7528 INT \u5c31\u4e0d\u8981\u4f7f\u7528 BIGINT \uff0c\u80fd\u4f7f\u7528 MEDIUMINT \u5c31\u4e0d\u8981\u4f7f\u7528 INT\u3002 \u8fd9\u662f\u56e0\u4e3a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u6570\u636e\u7c7b\u578b\u8d8a\u5c0f\uff0c\u5728\u67e5\u8be2\u65f6\u8fdb\u884c\u7684\u6bd4\u8f83\u64cd\u4f5c\u8d8a\u5feb\uff08CPU\u5c42\u6b21\uff09<\/li>\n\n\n\n<li>\u6570\u636e\u7c7b\u578b\u8d8a\u5c0f\uff0c\u7d22\u5f15\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u5c31\u8d8a\u5c11\uff0c\u5728\u4e00\u4e2a\u6570\u636e\u9875\u5185\u5c31\u53ef\u4ee5\u653e\u4e0b\u66f4\u591a\u7684\u8bb0\u5f55\uff0c\u4ece\u800c\u51cf\u5c11\u78c1\u76d8 I\/O \u5e26 \u6765\u7684\u6027\u80fd\u635f\u8017\uff0c\u4e5f\u5c31\u610f\u5473\u7740\u53ef\u4ee5\u628a\u66f4\u591a\u7684\u6570\u636e\u9875\u7f13\u5b58\u5728\u5185\u5b58\u4e2d\uff0c\u4ece\u800c\u52a0\u5feb\u8bfb\u5199\u6548\u7387\u3002<\/li>\n\n\n\n<li>\u8fd9\u4e2a\u5efa\u8bae\u5bf9\u4e8e\u8868\u7684\u4e3b\u952e\u6765\u8bf4\u66f4\u52a0\u9002\u7528\uff0c\u56e0\u4e3a\u4e0d\u4ec5\u662f\u805a\u7c07\u7d22\u5f15\u4e2d\u4f1a\u5b58\u50a8\u4e3b\u952e\u503c\uff0c\u5176\u4ed6\u6240\u6709\u7684\u4e8c\u7ea7\u7d22\u5f15\u7684\u8282\u70b9\u5904\u90fd\u4f1a\u5b58\u50a8\u4e00\u4efd\u8bb0\u5f55\u7684\u4e3b\u952e\u503c\uff0c\u5982\u679c\u4e3b\u952e\u9002\u7528\u66f4\u5c0f\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u5c31\u610f\u5473\u7740\u8282\u7701\u66f4\u591a\u7684\u5b58\u50a8\u7a7a\u95f4\u548c\u66f4\u9ad8\u6548\u7684 I\/O \u3002<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u7d22\u5f15\u5217\u524d\u7f00\uff08\u9488\u5bf9\u5b57\u7b26\u4e32\uff09<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u77e5\u9053\u4e00\u4e2a\u5b57\u7b26\u4e32\u5176\u5b9e\u662f\u7531\u82e5\u5e72\u4e2a\u5b57\u7b26\u7ec4\u6210\uff0c\u5982\u679c\u6211\u4eec\u5728 MySQL \u4e2d\u4f7f\u7528 utf8 \u5b57\u7b26\u96c6\u53bb\u5b58\u50a8\u5b57\u7b26\u4e32\u7684\u8bdd\uff0c\u7f16\u7801 \u4e00\u4e2a\u5b57\u7b26\u9700\u8981\u5360\u7528 1~3 \u4e2a\u5b57\u8282\u3002\u5047\u8bbe\u6211\u4eec\u7684\u5b57\u7b26\u4e32\u5f88\u957f\uff0c\u90a3\u5b58\u50a8\u4e00\u4e2a\u5b57\u7b26\u4e32\u5c31\u9700\u8981\u5360\u7528\u5f88\u5927\u7684\u5b58\u50a8\u7a7a\u95f4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u6211\u4eec \u9700\u8981\u4e3a\u8fd9\u4e2a\u5b57\u7b26\u4e32\u5217\u5efa\u7acb\u7d22\u5f15\u65f6\uff0c\u90a3\u5c31\u610f\u5473\u7740\u5728\u5bf9\u5e94\u7684 B+ \u6811\u4e2d\u6709\u8fd9\u4e48\u4e24\u4e2a\u95ee\u9898\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>B+ \u6811\u7d22\u5f15\u4e2d\u7684\u8bb0\u5f55\u9700\u8981\u628a\u8be5\u5217\u7684\u5b8c\u6574\u5b57\u7b26\u4e32\u5b58\u50a8\u8d77\u6765\uff0c\u800c\u4e14\u5b57\u7b26\u4e32\u8d8a\u957f\uff0c\u5728\u7d22\u5f15\u4e2d\u5360\u7528\u7684\u5b58\u50a8\u7a7a\u95f4\u8d8a\u5927\u3002<\/li>\n\n\n\n<li>\u5982\u679c B+ \u6811\u7d22\u5f15\u4e2d\u7d22\u5f15\u5217\u5b58\u50a8\u7684\u5b57\u7b26\u4e32\u5f88\u957f\uff0c\u90a3\u5728\u505a\u5b57\u7b26\u4e32\u6bd4\u8f83\u65f6\u4f1a\u5360\u7528\u66f4\u591a\u7684\u65f6\u95f4\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u524d\u8fb9\u8bf4\u8fc7\u7d22\u5f15\u5217\u7684\u5b57\u7b26\u4e32\u524d\u7f00\u5176\u5b9e\u4e5f\u662f\u6392\u597d\u5e8f\u7684\uff0c\u6240\u4ee5\u7d22\u5f15\u7684\u8bbe\u8ba1\u8005\u63d0\u51fa\u4e86\u4e00\u4e2a\u65b9\u6848\uff0c<strong>\u53ea\u5bf9\u5b57\u7b26\u4e32\u7684\u524d\u51e0\u4e2a\u5b57\u7b26\u8fdb\u884c\u7d22\u5f15<\/strong>\u4e5f\u5c31\u662f\u8bf4\u5728\u4e8c\u7ea7\u7d22\u5f15\u7684\u8bb0\u5f55\u4e2d\u53ea\u4fdd\u7559\u5b57\u7b26\u4e32\u524d\u51e0\u4e2a\u5b57\u7b26\u3002\u8fd9\u6837\u5728\u67e5\u627e\u8bb0\u5f55\u65f6\u867d\u7136\u4e0d\u80fd\u7cbe\u786e\u7684\u5b9a\u4f4d\u5230\u8bb0\u5f55\u7684\u4f4d\u7f6e\uff0c\u4f46\u662f\u80fd\u5b9a\u4f4d\u5230\u76f8\u5e94\u524d\u7f00\u6240\u5728\u7684\u4f4d\u7f6e\uff0c\u7136\u540e\u6839\u636e\u524d\u7f00\u76f8\u540c\u7684\u8bb0\u5f55\u7684\u4e3b\u952e\u503c\u56de\u8868\u67e5\u8be2\u5b8c\u6574\u7684\u5b57\u7b26\u4e32\u503c\uff0c\u518d\u5bf9\u6bd4\u5c31\u597d\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\uff0c\u53ea\u5728 B+ \u6811\u4e2d\u5b58\u50a8\u5b57\u7b26\u4e32\u7684\u524d\u51e0\u4e2a\u5b57\u7b26\u7684\u7f16\u7801\uff0c\u65e2\u8282\u7ea6\u7a7a\u95f4\uff0c\u53c8\u51cf\u5c11\u4e86\u5b57\u7b26\u4e32\u7684\u6bd4\u8f83\u65f6\u95f4\uff0c\u8fd8\u5927\u6982\u80fd\u89e3\u51b3\u6392\u5e8f\u7684\u95ee\u9898\uff0c\u4f55\u4e50\u800c\u4e0d\u4e3a\uff0c\u6bd4\u65b9\u8bf4\u6211\u4eec\u5728\u5efa\u8868\u8bed\u53e5\u4e2d\u53ea\u5bf9 name \u5217\u7684\u524d5\u4e2a\u5b57\u7b26\u8fdb\u884c\u7d22\u5f15\u53ef\u4ee5 \u8fd9\u4e48\u5199\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE `user` (\n  `id` int NOT NULL AUTO_INCREMENT,\n  `name` varchar(10) DEFAULT NULL,\n  `birthday` date DEFAULT NULL,\n  `point` bigint DEFAULT NULL,\n  `city` varchar(20) DEFAULT NULL,\n  PRIMARY KEY (`id`),\n  KEY `idx_name_birthday_city` (`name`(5),`birthday`,`city`)\n);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">name(5) \u5c31\u8868\u793a\u5728\u5efa\u7acb\u7684 B+ \u6811\u7d22\u5f15\u4e2d\u53ea\u4fdd\u7559\u8bb0\u5f55\u7684\u524d5\u4e2a\u5b57\u7b26\u7684\u7f16\u7801\uff0c\u8fd9\u79cd<strong>\u53ea\u7d22\u5f15\u5b57\u7b26\u4e32\u503c\u7684\u524d\u7f00\u7684\u7b56\u7565\u662f\u6211\u4eec\u975e\u5e38\u9f13\u52b1\u7684<\/strong>\uff0c\u5c24\u5176\u662f\u5728\u5b57\u7b26\u4e32\u7c7b\u578b\u80fd\u5b58\u50a8\u7684\u5b57\u7b26\u6bd4\u8f83\u591a\u7684\u65f6\u5019<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u662f\uff0c\u9700\u8981\u6ce8\u610f\u7684\u662f\u5982\u679c\u4f7f\u7528\u4e86\u7d22\u5f15\u5217\u524d\u7f00\uff0c\u6bd4\u65b9\u8bf4\u524d\u8fb9\u53ea\u628a name \u5217\u7684\u524d5\u4e2a\u5b57\u7b26\u653e\u5230\u4e86\u4e8c\u7ea7\u7d22\u5f15\u4e2d\uff0c\u4e0b\u8fb9\u8fd9\u4e2a\u6392\u5e8f\u53ef\u80fd\u5c31\u6709\u70b9\u513f\u95ee\u9898\u4e86\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT * FROM user ORDER BY name LIMIT 10;<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u4e8c\u7ea7\u7d22\u5f15\u4e2d\u4e0d\u5305\u542b\u5b8c\u6574\u7684 name \u5217\u4fe1\u606f\uff0c\u6240\u4ee5\u65e0\u6cd5\u5bf9\u524d5\u4e2a\u5b57\u7b26\u76f8\u540c\uff0c\u540e\u8fb9\u7684\u5b57\u7b26\u4e0d\u540c\u7684\u8bb0\u5f55\u8fdb\u884c\u6392\u5e8f\uff0c\u4e5f \u5c31\u662f\u4f7f\u7528\u7d22\u5f15\u5217\u524d\u7f00\u7684\u65b9\u5f0f\u65e0\u6cd5\u652f\u6301\u4f7f\u7528\u7d22\u5f15\u6392\u5e8f\uff0c\u53ea\u80fd\u4f7f\u7528filesort\u6587\u4ef6\u6392\u5e8f\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u7d22\u5f15\u5217\u5728\u8868\u8fbe\u5f0f\u4e2d\u5355\u72ec\u51fa\u73b0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8bbe\u8868\u4e2d\u6709\u4e00\u4e2a\u6574\u6570\u5217 int_column\uff0c\u6211\u4eec\u4e3a\u8fd9\u4e2a\u5217\u5efa\u7acb\u4e86\u7d22\u5f15\u3002\u4e0b\u8fb9\u7684\u4e24\u4e2a WHERE \u5b50\u53e5\u867d\u7136\u8bed\u4e49\u662f\u4e00\u81f4\u7684\uff0c\u4f46\u662f\u5728 \u6548\u7387\u4e0a\u5374\u6709\u5dee\u522b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code> 1. WHERE int_column * 3 &lt; 60\n 2. WHERE int_column &lt; 60 \/ 3<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7b2c1\u4e2a WHERE \u5b50\u53e5\u4e2d int_column\u5217\u5e76\u4e0d\u662f\u4ee5\u5355\u72ec\u5217\u7684\u5f62\u5f0f\u51fa\u73b0\u7684\uff0c\u800c\u662f\u4ee5 int_column* 3 \u8fd9\u6837\u7684\u8868\u8fbe\u5f0f\u7684\u5f62\u5f0f\u51fa\u73b0\u7684\uff0c \u5b58\u50a8\u5f15\u64ce\u4f1a\u4f9d\u6b21\u904d\u5386\u6240\u6709\u7684\u8bb0\u5f55\uff0c\u8ba1\u7b97\u8fd9\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u662f\u4e0d\u662f\u5c0f\u4e8e 60 \uff0c\u6240\u4ee5\u8fd9\u79cd\u60c5\u51b5\u4e0b\u662f\u4f7f\u7528\u4e0d\u5230\u4e3a int_column\u5217 \u5efa\u7acb\u7684 B+ \u6811\u7d22\u5f15\u7684\u3002<\/li>\n\n\n\n<li>\u800c\u7b2c2\u4e2a WHERE \u5b50\u53e5\u4e2d int_column\u5217\u5e76\u662f\u4ee5\u5355\u72ec\u5217\u7684\u5f62\u5f0f\u51fa\u73b0\u7684\uff0c\u8fd9\u6837\u7684\u60c5\u51b5\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528 B+ \u6811\u7d22\u5f15\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u7ed3\u8bba\u5c31\u662f\uff1a\u5982\u679c\u7d22\u5f15\u5217\u5728\u6bd4\u8f83\u8868\u8fbe\u5f0f\u4e2d\u4e0d\u662f\u4ee5\u5355\u72ec\u5217\u7684\u5f62\u5f0f\u51fa\u73b0\uff0c\u800c\u662f\u4ee5\u67d0\u4e2a\u8868\u8fbe\u5f0f\uff0c\u6216\u8005\u51fd\u6570\u8c03\u7528\u5f62\u5f0f\u51fa \u73b0\u7684\u8bdd\uff0c\u662f\u7528\u4e0d\u5230\u7d22\u5f15\u7684\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e3b\u952e\u63d2\u5165\u987a\u5e8f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u77e5\u9053\uff0c\u5bf9\u4e8e\u4e00\u4e2a\u4f7f\u7528 InnoDB \u5b58\u50a8\u5f15\u64ce\u7684\u8868\u6765\u8bf4\uff0c\u5728\u6211\u4eec\u6ca1\u6709\u663e\u5f0f\u7684\u521b\u5efa\u7d22\u5f15\u65f6\uff0c\u8868\u4e2d\u7684\u6570\u636e\u5b9e\u9645\u4e0a\u90fd\u662f\u5b58 \u50a8\u5728\u805a\u7c07\u7d22\u5f15\u7684\u53f6\u5b50\u8282\u70b9\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u8bb0\u5f55\u53c8\u662f\u5b58\u50a8\u5728\u666e\u901a\u6570\u636e\u9875\u4e2d\u7684\uff0c\u666e\u901a\u6570\u636e\u9875\u4e2d\u7684\u8bb0\u5f55\u53c8\u662f\u6309\u7167\u8bb0\u5f55\u4e3b\u952e\u503c\u4ece\u5c0f\u5230\u5927\u7684\u987a\u5e8f\u8fdb\u884c\u6392\u5e8f\uff0c\u6240\u4ee5<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5982\u679c\u6211\u4eec\u63d2\u5165\u7684\u8bb0\u5f55\u7684\u4e3b\u952e\u503c\u662f\u4f9d\u6b21\u589e\u5927\u7684\u8bdd\uff0c\u90a3\u6211\u4eec\u6bcf\u63d2\u6ee1\u4e00\u4e2a\u6570\u636e\u9875\u5c31\u6362\u5230\u4e0b\u4e00\u4e2a\u6570\u636e\u9875\u7ee7\u7eed\u63d2\uff0c<\/li>\n\n\n\n<li>\u800c\u5982\u679c\u6211\u4eec\u63d2\u5165\u7684\u4e3b\u952e\u503c\u5ffd\u5927\u5ffd\u5c0f\u7684\u8bdd\uff0c\u8fd9\u5c31\u6bd4\u8f83\u9ebb\u70e6\u4e86\uff0c\u5047\u8bbe\u67d0\u4e2a\u6570\u636e\u9875\u5b58\u50a8\u7684\u8bb0\u5f55\u5df2\u7ecf\u6ee1\u4e86\uff0c\u5b83\u5b58\u50a8\u7684\u4e3b\u952e\u503c\u5728 1~100 \u4e4b\u95f4\uff1a<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-55-1024x263.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"263\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-55-1024x263.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-380\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u5047\u8bbe\u6b64\u65f6\u6211\u4eec\u9700\u8981\u5411\u6570\u636e\u9875\u4e2d\u63d2\u5165\u4e3b\u952e\u503c\u4e3a7\u7684\u4e00\u884c\u6570\u636e\uff0c\u5982\u56fe\u6240\u793a:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-61-1024x504.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"504\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-61-1024x504.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-386\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u8fd9\u4e2a\u6570\u636e\u9875\u5df2\u7ecf\u6ee1\u4e86\u554a\uff0c\u518d\u63d2\u8fdb\u6765\u548b\u529e\u5462\uff1fInnoDB\u9700\u8981\u628a\u5f53\u524d\u9875\u9762\u5206\u88c2\u6210\u4e24\u4e2a\u9875\u9762\uff0c\u628a\u672c\u9875\u4e2d\u7684\u4e00\u4e9b\u8bb0\u5f55\u79fb\u52a8\u5230\u65b0\u521b\u5efa\u7684\u8fd9\u4e2a\u9875\u4e2d\u3002\u9875\u9762\u5206\u88c2\u548c\u8bb0\u5f55\u79fb\u4f4d\u610f\u5473\u7740\u4ec0\u4e48\uff1f\u610f\u5473\u7740\uff1a\u6027\u80fd\u635f\u8017\uff01\u6240\u4ee5\u5982\u679c\u6211\u4eec\u60f3\u5c3d\u91cf\u907f\u514d\u8fd9\u6837\u65e0\u8c13\u7684 \u6027\u80fd\u635f\u8017\uff0c\u6700\u597d\u8ba9\u63d2\u5165\u7684\u8bb0\u5f55\u7684\u4e3b\u952e\u503c\u4f9d\u6b21\u9012\u589e\uff0c\u8fd9\u6837\u5c31\u4e0d\u4f1a\u53d1\u751f\u8fd9\u6837\u7684\u6027\u80fd\u635f\u8017\u4e86\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u6211\u4eec\u5efa\u8bae\uff1a\u4e3a\u4e86\u8ba9\u4e3b\u952e\u4f9d\u6b21\u9012\u589e\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 AUTO_INCREMENT\uff0c\u6216\u8005\u4f7f\u7528\u5176\u4ed6\u65b9\u5f0f(\u96ea\u82b1\u7b97\u6cd5)\u751f\u6210\u4f9d\u6b21\u9012\u589e\u7684\u4e3b\u952e\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u6d88\u9664\u5197\u4f59\u548c\u91cd\u590d\u7d22\u5f15<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f88\u591a\u65f6\u5019\uff0c\u6211\u4eec\u4f1a\u6709\u610f\u6216\u8005\u65e0\u610f\u5730\u521b\u5efa\u540c\u4e00\u4e2a\u5217\u7684\u591a\u4e2a\u4e0d\u540c\u7d22\u5f15\uff0c\u6bd4\u5982\u5982\u4e0b\u7684\u5efa\u8868\u8bed\u53e5:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE `user` (\n  `id` int NOT NULL AUTO_INCREMENT,\n  `name` varchar(10) DEFAULT NULL,\n  `birthday` date DEFAULT NULL,\n  `point` bigint DEFAULT NULL,\n  `city` varchar(20) DEFAULT NULL,\n  PRIMARY KEY (`id`),\n  KEY `idx_name_birthday_city` (`name`(5),`birthday`,`city`),\n  KEY 'idx_name'(`name`(5))\n);<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u77e5\u9053\uff0c\u901a\u8fc7 idx_name_birthday_city \u7d22\u5f15\u5c31\u53ef\u4ee5\u5bf9 name \u5217\u8fdb\u884c\u5feb\u901f\u641c\u7d22\uff0c\u518d\u521b\u5efa\u4e00\u4e2a\u4e13\u95e8\u9488\u5bf9 name \u5217\u7684\u7d22\u5f15\u5c31\u7b97\u662f\u4e00\u4e2a \u5197\u4f59\u7d22\u5f15\uff0c\u7ef4\u62a4\u8fd9\u4e2a\u7d22\u5f15\u53ea\u4f1a\u589e\u52a0\u7ef4\u62a4\u7684\u6210\u672c\uff0c\u5e76\u4e0d\u4f1a\u5bf9\u641c\u7d22\u6709\u4ec0\u4e48\u597d\u5904\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e6\u4e00\u79cd\u60c5\u51b5\uff0c\u6211\u4eec\u53ef\u80fd\u4f1a\u5bf9\u67d0\u4e2a\u5217\u91cd\u590d\u5efa\u7acb\u7d22\u5f15\uff0c\u6bd4\u5982\u5982\u4e0b\u5efa\u8868\u8bed\u53e5\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CREATE TABLE repeat_demo (\n id INT PRIMARY KEY,\n age INT,\n UNIQUE uidx_id (id),\n INDEX idx_id (id)\n); \n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u770b\u5230\uff0c id \u65e2\u662f\u4e3b\u952e\u3001\u53c8\u7ed9\u5b83\u5b9a\u4e49\u4e3a\u4e00\u4e2a\u552f\u4e00\u7d22\u5f15\uff0c\u8fd8\u7ed9\u5b83\u5b9a\u4e49\u4e86\u4e00\u4e2a\u666e\u901a\u7d22\u5f15\uff0c\u53ef\u662f\u4e3b\u952e\u672c\u8eab\u5c31\u4f1a\u751f\u6210\u805a\u7c07\u7d22\u5f15\uff0c\u6240\u4ee5\u5b9a\u4e49\u7684\u552f\u4e00\u7d22\u5f15\u548c\u666e\u901a\u7d22\u5f15\u662f\u91cd\u590d\u7684\uff0c\u8fd9\u79cd\u60c5\u51b5\u8981\u907f\u514d\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u603b\u7ed3<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u91cc\u6211\u4eec\u6700\u4e3b\u8981\u7684\u662f\u7ed9\u5927\u5bb6\u4ecb\u7ecd\u4e86InnoDB\u7684B+\u6811\u7d22\u5f15(\u805a\u7c07\u7d22\u5f15\uff0c\u4e8c\u7ea7\u7d22\u5f15\uff0c\u8054\u5408\u7d22\u5f15)\uff0c\u5728\u5145\u5206\u7406\u89e3\u4e86B+\u6811\u7d22\u5f15\u7684\u57fa\u7840\u4e0a\uff0c\u6211\u4eec\u6709\u7ed9\u5927\u5bb6\u8bb2\u89e3\u4e86\u7d22\u5f15\u5728InnoDB\u67e5\u8be2\uff0c\u6392\u5e8f\uff0c\u5206\u7ec4\u4e2d\u7684\u4f7f\u7528\uff0c\u6700\u540e\u8bb2\u89e3\u4e86\u6211\u4eec\u5e94\u8be5\u5982\u4f55\u9009\u62e9\u4f7f\u7528\u7d22\u5f15\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u8fc7\u4ee5\u4e0a\u7684\u8bb2\u89e3\uff0c\u5927\u5bb6\u5e94\u8be5\u80fd\u66f4\u52a0\u6df1\u523b\u7684\u7406\u89e3\uff0c\u7d22\u5f15\u5c24\u5176\u5728\u52a0\u901f\u67e5\u8be2\u8fc7\u7a0b\u4e2d\u7684\u4f5c\u7528\u3002\u6b63\u56e0\u4e3a\u5982\u6b64\uff0c\u57fa\u4e8e\u6211\u4eec\u4ee5\u4e0a\u6240\u8bb2\u7684\u7d22\u5f15\u539f\u7406\uff0c\u4e00\u4e9b\u5e38\u89c1\u7684SQL\u4f18\u5316\u89c4\u5219\u6211\u4eec\u5c31\u53ef\u4ee5\u7406\u89e3\u4e86\uff0c\u6bd4\u5982:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e0d\u5efa\u8bae\u67e5\u8be2\u65f6\u4f7f\u7528select *<\/li>\n\n\n\n<li>\u6240\u8c13\u7684\u6700\u5de6\u524d\u7f00\u5339\u914d\u539f\u5219<\/li>\n\n\n\n<li>\u67e5\u8be2\u6761\u4ef6\u4e2d\uff0c\u5efa\u8bae\u7d22\u5f15\u5217\u5355\u72ec\u51fa\u73b0(\u4e0d\u51fa\u73b0\u5728\u65b9\u6cd5\u8c03\u7528\uff0c\u4ee5\u53ca\u8fd0\u7b97\u8868\u8fbe\u5f0f\u4e2d)<\/li>\n\n\n\n<li>\u6392\u5e8f\u4e2d\u7684\u591a\u5217\u987a\u5e8f\u4e0e\u8054\u5408\u7d22\u5f15\u5217\u4e00\u81f4(\u5982\u679c\u6709\u7684\u8bdd)<\/li>\n\n\n\n<li>\u6392\u5e8f\u4e0d\u5efa\u8baeASC\uff0cDESC\u6df7\u7528<\/li>\n\n\n\n<li>\u5efa\u8bae\u4fdd\u6301\u4e3b\u952e\u5217\u9012\u589e<\/li>\n\n\n\n<li>\u5728\u6ee1\u8db3\u4e1a\u52a1\u9700\u8981\u7684\u524d\u63d0\u4e0b\uff0c\u5c3d\u91cf\u521b\u5efa\u8054\u5408\u7d22\u5f15<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">&#8230;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u9664\u6b64\u4e4b\u5916\uff0c\u6211\u4eec\u8fd8\u5e94\u8be5\u77e5\u9053\uff0c\u5982\u679c\u5df2\u7ecf\u53d1\u73b0\u4e00\u4e2aSQL\u8bed\u53e5\u6267\u884c\u8f83\u6162\uff0c\u5982\u4f55\u5728SQL\u8bed\u53e5\u5c42\u9762\u4f18\u5316\uff1f<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u9996\u5148\uff0c\u52a0\u5feb\u67e5\u8be2\u6211\u4eec\u5e94\u8be5\u9a6c\u4e0a\u60f3\u5230\u7d22\u5f15\uff0c\u5148\u770b\u770b\u8be5SQL\u8bed\u53e5\u7684\u67e5\u8be2\u6761\u4ef6\u6240\u6d89\u53ca\u7684\u5217\u662f\u5426\u521b\u5efa\u7d22\u5f15\uff0c\u82e5\u6ca1\u6709\u5219\u53ef\u4ee5\u6dfb\u52a0\u7d22\u5f15<\/li>\n\n\n\n<li>\u4f46\u662f\uff0c\u5982\u679c\u53d1\u73b0\u67e5\u8be2\u6761\u4ef6\u6d89\u53ca\u5230\u7684\u5217\u5df2\u7ecf\u6dfb\u52a0\u4e86\u7d22\u5f15\uff0c\u6b64\u65f6\u6211\u4eec\u5c31\u9700\u8981\u5224\u65ad\uff0c\u672c\u6b21\u67e5\u8be2\u662f\u5426\u8d70\u4e86\u7d22\u5f15(\u8fd9\u79cd\u60c5\u51b5\u5927\u90e8\u5206\u662f\u6ca1\u6709\u8d70\u7d22\u5f15\u7684)\u7136\u540e\u505a\u76f8\u5e94\u8c03\u6574\uff0c\u90a3\u4e48\u95ee\u9898\u6765\u4e86\uff0c\u6211\u4eec\u600e\u4e48\u77e5\u9053\u67e5\u8be2\u6709\u6ca1\u6709\u8d70\u7d22\u5f15\u5462\uff1f\u53ef\u4ee5\u901a\u8fc7MySQL\u63d0\u4f9b\u7684explain\u5de5\u5177\uff0c\u5176\u8bed\u6cd5\u5982\u4e0b:<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>explain \u67e5\u8be2\u8bed\u53e5<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u200b MySQL\u4e2d\u7684\u67e5\u8be2\uff0c\u90fd\u662f\u7ecf\u8fc7\u67e5\u8be2\u4f18\u5316\u5668\u6700\u7ec8\u51b3\u5b9a\u7684\u67e5\u8be2\u8ba1\u5212\u6267\u884c\u7684\uff0c\u800cexplain\u53ef\u4ee5\u8f93\u67e5\u8be2\u8bed\u53e5\u6267\u884c\u65f6\u7684\u6267\u884c\u8ba1\u5212\uff0c\u901a\u8fc7\u67e5\u770b\u6267\u884c\u8ba1\u5212\uff0c\u5c31\u53ef\u4ee5\u5224\u65ad\u67e5\u8be2\u7684\u6267\u884c\u8fc7\u7a0b\uff0c\u4e5f\u53ef\u4ee5\u770b\u5230\u67e5\u8be2\u8fc7\u7a0b\u4e2d\u7684\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\uff0c\u5982\u56fe:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-53.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1022\" height=\"70\" data-original=\"https:\/\/larkdrop.cafe\/wp-content\/uploads\/2026\/06\/image-53.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-378\"  sizes=\"auto, (max-width: 1022px) 100vw, 1022px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u6bd4\u5982\uff0c\u9488\u5bf9\u67d0\u4e2a\u67e5\u8be2\uff0c\u901a\u8fc7\u5176possible_keys\u5217\u7684\u503c\uff0c\u53ef\u4ee5\u770b\u5230\u8be5\u67e5\u8be2\u53ef\u80fd\u4f7f\u7528\u5230\u7684\u7d22\u5f15\uff0ckey\u5217\u7684\u503c\u8868\u793a\u8be5\u67e5\u8be2\u5b9e\u9645\u4f7f\u7528\u7684\u7d22\u5f15\u7b49\u7b49\uff0c\u8fd9\u4e9b\u4fe1\u606f\uff0c\u6211\u4eec\u90fd\u53ef\u4ee5\u4eceexplain\u7684\u6267\u884c\u8ba1\u5212\u8f93\u51fa\u4e2d\u770b\u5230\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7d22\u5f15\u7684\u5f15\u5165 \u7d22\u5f15\uff08Index\uff09\u662f\u6570\u636e\u5e93\u4e2d\u4e00\u79cd\u7279\u6b8a\u7684\u6570\u636e\u7ed3\u6784\uff0c\u5b83\u7528\u4e8e\u63d0\u9ad8\u6570\u636e\u5e93\u67e5\u8be2\u7684\u6548\u7387\u548c\u901f\u5ea6\u3002\u5728\u6570\u636e\u5e93\u4e2d\uff0c\u7d22\u5f15 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[14],"class_list":["post-374","post","type-post","status-publish","format-standard","hentry","category-learn","tag-14"],"_links":{"self":[{"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts\/374","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/comments?post=374"}],"version-history":[{"count":1,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts\/374\/revisions"}],"predecessor-version":[{"id":396,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/posts\/374\/revisions\/396"}],"wp:attachment":[{"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/media?parent=374"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/categories?post=374"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/larkdrop.cafe\/index.php\/wp-json\/wp\/v2\/tags?post=374"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}