{"id":6317,"date":"2024-11-14T12:05:00","date_gmt":"2024-11-14T04:05:00","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6317\/"},"modified":"2024-11-14T12:05:00","modified_gmt":"2024-11-14T04:05:00","slug":"mysql%e7%b4%a2%e5%bc%95%e5%a6%82%e4%bd%95%e5%88%9b%e5%bb%ba","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6317\/","title":{"rendered":"mysql\u7d22\u5f15\u5982\u4f55\u521b\u5efa"},"content":{"rendered":"<blockquote><p>\n  mysql\u7d22\u5f15\u521b\u5efa\u6307\u5357\uff1a\u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217\uff1a\u5e38\u88ab\u641c\u7d22\u6216\u6392\u5e8f\u7684\u5217\u3002\u9009\u62e9\u7d22\u5f15\u7c7b\u578b\uff1ab-tree\u7d22\u5f15\uff08\u8303\u56f4\u67e5\u8be2\uff09\u3001\u54c8\u5e0c\u7d22\u5f15\uff08\u7b49\u503c\u67e5\u8be2\uff09\u3001\u5168\u6587\u7d22\u5f15\uff08\u6587\u672c\u641c\u7d22\uff09\u3001\u7a7a\u95f4\u7d22\u5f15\uff08\u5730\u7406\u7a7a\u95f4\u641c\u7d22\uff09\u3002\u547d\u540d\u7d22\u5f15\uff1a\u6307\u5b9a\u6709\u610f\u4e49\u7684\u540d\u79f0\u3002\u521b\u5efa\u7d22\u5f15\uff1a\u4f7f\u7528create index \u8bed\u6cd5\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202407\/31\/2024073122282572845.jpg\" class=\"aligncenter\" title=\"mysql\u7d22\u5f15\u5982\u4f55\u521b\u5efa\u63d2\u56fe\" alt=\"mysql\u7d22\u5f15\u5982\u4f55\u521b\u5efa\u63d2\u56fe\" \/><\/p>\n<p><strong>MySQL \u7d22\u5f15\u521b\u5efa\u6307\u5357<\/strong><\/p>\n<p><strong>\u5982\u4f55\u521b\u5efa MySQL \u7d22\u5f15\uff1f<\/strong><\/p>\n<p>\u521b\u5efa MySQL \u7d22\u5f15\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>CREATE INDEX [index_name] ON [table_name] ([column_name(s)])<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>\u521b\u5efa\u7d22\u5f15\u7684\u6b65\u9aa4\uff1a<\/strong><\/p>\n<ol>\n<li> <strong>\u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217\uff1a<\/strong>\u7d22\u5f15\u5e94\u8be5\u521b\u5efa\u5728\u7ecf\u5e38\u88ab\u641c\u7d22\u6216\u6392\u5e8f\u7684\u5217\u4e0a\u3002<\/li>\n<li> <strong>\u9009\u62e9\u7d22\u5f15\u7c7b\u578b\uff1a<\/strong>MySQL \u652f\u6301\u591a\u79cd\u7d22\u5f15\u7c7b\u578b\uff0c\u5982 B-Tree \u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u7b49\u3002\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7c7b\u578b\u53ef\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002<\/li>\n<li> <strong>\u547d\u540d\u7d22\u5f15\uff1a<\/strong>\u4e3a\u7d22\u5f15\u6307\u5b9a\u4e00\u4e2a\u6709\u610f\u4e49\u7684\u540d\u79f0\uff0c\u4ee5\u65b9\u4fbf\u8bc6\u522b\u548c\u7ba1\u7406\u3002<\/li>\n<li> <strong>\u521b\u5efa\u7d22\u5f15\uff1a<\/strong>\u4f7f\u7528\u4e0a\u8ff0\u8bed\u6cd5\u521b\u5efa\u7d22\u5f15\u3002<\/li>\n<\/ol>\n<p><strong>\u8be6\u7ec6\u8bf4\u660e\uff1a<\/strong><\/p>\n<p><strong>\u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217<\/strong><\/p>\n<p>\u9009\u62e9\u8981\u7d22\u5f15\u7684\u5217\u65f6\uff0c\u5e94\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li> <strong>\u67e5\u8be2\u9891\u7387\uff1a<\/strong>\u7ecf\u5e38\u641c\u7d22\u6216\u6392\u5e8f\u7684\u5217\u662f\u9700\u8981\u7d22\u5f15\u7684\u6700\u4f73\u5019\u9009\u3002<\/li>\n<li> <strong>\u6570\u636e\u5206\u5e03\uff1a<\/strong>\u6570\u636e\u5206\u5e03\u4e0d\u5747\u5300\u7684\u5217\uff08\u5982\u6027\u522b\uff09\u4e0d\u9002\u5408\u7d22\u5f15\u3002<\/li>\n<li> <strong>\u5217\u5927\u5c0f\uff1a<\/strong>\u8f83\u5c0f\u7684\u5217\u66f4\u9002\u5408\u7d22\u5f15\u3002<\/li>\n<\/ul>\n<p><strong>\u9009\u62e9\u7d22\u5f15\u7c7b\u578b<\/strong><\/p>\n<p>MySQL \u652f\u6301\u4ee5\u4e0b\u7d22\u5f15\u7c7b\u578b\uff1a<\/p>\n<ul>\n<li> <strong>B-Tree \u7d22\u5f15\uff1a<\/strong>\u6700\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u7528\u4e8e\u8303\u56f4\u67e5\u8be2\u3002<\/li>\n<li> <strong>\u54c8\u5e0c\u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u7b49\u503c\u67e5\u8be2\uff0c\u901f\u5ea6\u5feb\uff0c\u4f46\u7a7a\u95f4\u9700\u6c42\u8f83\u5927\u3002<\/li>\n<li> <strong>\u5168\u6587\u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u6587\u672c\u641c\u7d22\u3002<\/li>\n<li> <strong>\u7a7a\u95f4\u7d22\u5f15\uff1a<\/strong>\u7528\u4e8e\u5730\u7406\u7a7a\u95f4\u641c\u7d22\u3002<\/li>\n<\/ul>\n<p><strong>\u547d\u540d\u7d22\u5f15<\/strong><\/p>\n<p>\u7d22\u5f15\u7684\u540d\u79f0\u5e94\u8be5\u6709\u610f\u4e49\uff0c\u4ee5\u4fbf\u4e8e\u5728\u9700\u8981\u65f6\u8f7b\u677e\u8bc6\u522b\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c06\u7d22\u5f15\u547d\u540d\u4e3a idx_name_last\uff0c\u8868\u793a\u5bf9 name \u548c last \u5217\u521b\u5efa\u7684\u7d22\u5f15\u3002<\/p>\n<p><strong>\u521b\u5efa\u7d22\u5f15<\/strong><\/p>\n<p>\u521b\u5efa\u7d22\u5f15\u540e\uff0cMySQL \u4f1a\u81ea\u52a8\u7ef4\u62a4\u7d22\u5f15\u3002\u8fd9\u610f\u5473\u7740\u968f\u7740\u5bf9\u8868\u683c\u8fdb\u884c\u63d2\u5165\u3001\u66f4\u65b0\u548c\u5220\u9664\u64cd\u4f5c\uff0c\u7d22\u5f15\u4e5f\u4f1a\u76f8\u5e94\u66f4\u65b0\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u7d22\u5f15\u5982\u4f55\u521b\u5efa\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u7f51\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>mysql\u7d22\u5f15\u521b\u5efa\u6307\u5357\uff1a\u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217\uff1a\u5e38\u88ab\u641c\u7d22\u6216\u6392\u5e8f\u7684\u5217\u3002\u9009\u62e9\u7d22\u5f15\u7c7b\u578b\uff1ab-tree\u7d22\u5f15\uff08\u8303\u56f4\u67e5\u8be2\uff09\u3001\u54c8\u5e0c\u7d22\u5f15\uff08\u7b49\u503c\u67e5\u8be2\uff09\u3001\u5168\u6587\u7d22\u5f15\uff08\u6587\u672c\u641c\u7d22\uff09\u3001\u7a7a\u95f4\u7d22\u5f15\uff08\u5730\u7406\u7a7a\u95f4\u641c\u7d22\uff09\u3002\u547d\u540d\u7d22\u5f15\uff1a\u6307\u5b9a\u6709\u610f\u4e49\u7684\u540d\u79f0\u3002\u521b\u5efa\u7d22\u5f15\uff1a\u4f7f\u7528create index \u8bed\u6cd5\u3002 MySQL \u7d22\u5f15\u521b\u5efa\u6307\u5357 \u5982\u4f55\u521b\u5efa MySQL \u7d22\u5f15\uff1f \u521b\u5efa MySQL \u7d22\u5f15\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a CREATE INDEX [index_name] ON [table_name] ([column_name(s)]) \u767b\u5f55\u540e\u590d\u5236 \u521b\u5efa\u7d22\u5f15\u7684\u6b65\u9aa4\uff1a \u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217\uff1a\u7d22\u5f15\u5e94\u8be5\u521b\u5efa\u5728\u7ecf\u5e38\u88ab\u641c\u7d22\u6216\u6392\u5e8f\u7684\u5217\u4e0a\u3002 \u9009\u62e9\u7d22\u5f15\u7c7b\u578b\uff1aMySQL \u652f\u6301\u591a\u79cd\u7d22\u5f15\u7c7b\u578b\uff0c\u5982 B-Tree \u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u7b49\u3002\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7c7b\u578b\u53ef\u63d0\u9ad8\u67e5\u8be2\u6027\u80fd\u3002 \u547d\u540d\u7d22\u5f15\uff1a\u4e3a\u7d22\u5f15\u6307\u5b9a\u4e00\u4e2a\u6709\u610f\u4e49\u7684\u540d\u79f0\uff0c\u4ee5\u65b9\u4fbf\u8bc6\u522b\u548c\u7ba1\u7406\u3002 \u521b\u5efa\u7d22\u5f15\uff1a\u4f7f\u7528\u4e0a\u8ff0\u8bed\u6cd5\u521b\u5efa\u7d22\u5f15\u3002 \u8be6\u7ec6\u8bf4\u660e\uff1a \u786e\u5b9a\u8981\u7d22\u5f15\u7684\u5217 \u9009\u62e9\u8981\u7d22\u5f15\u7684\u5217\u65f6\uff0c\u5e94\u8003\u8651\u4ee5\u4e0b\u56e0\u7d20\uff1a \u67e5\u8be2\u9891\u7387\uff1a\u7ecf\u5e38\u641c\u7d22\u6216\u6392\u5e8f\u7684\u5217\u662f\u9700\u8981\u7d22\u5f15\u7684\u6700\u4f73\u5019\u9009\u3002 \u6570\u636e\u5206\u5e03\uff1a\u6570\u636e\u5206\u5e03\u4e0d\u5747\u5300\u7684\u5217\uff08\u5982\u6027\u522b\uff09\u4e0d\u9002\u5408\u7d22\u5f15\u3002 \u5217\u5927\u5c0f\uff1a\u8f83\u5c0f\u7684\u5217\u66f4\u9002\u5408\u7d22\u5f15\u3002 \u9009\u62e9\u7d22\u5f15\u7c7b\u578b MySQL \u652f\u6301\u4ee5\u4e0b\u7d22\u5f15\u7c7b\u578b\uff1a B-Tree \u7d22\u5f15\uff1a\u6700\u5e38\u7528\u7684\u7d22\u5f15\u7c7b\u578b\uff0c\u7528\u4e8e\u8303\u56f4\u67e5\u8be2\u3002 \u54c8\u5e0c\u7d22\u5f15\uff1a\u7528\u4e8e\u7b49\u503c\u67e5\u8be2\uff0c\u901f\u5ea6\u5feb\uff0c\u4f46\u7a7a\u95f4\u9700\u6c42\u8f83\u5927\u3002 \u5168\u6587\u7d22\u5f15\uff1a\u7528\u4e8e\u6587\u672c\u641c\u7d22\u3002 \u7a7a\u95f4\u7d22\u5f15\uff1a\u7528\u4e8e\u5730\u7406\u7a7a\u95f4\u641c\u7d22\u3002 \u547d\u540d\u7d22\u5f15 \u7d22\u5f15\u7684\u540d\u79f0\u5e94\u8be5\u6709\u610f\u4e49\uff0c\u4ee5\u4fbf\u4e8e\u5728\u9700\u8981\u65f6\u8f7b\u677e\u8bc6\u522b\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c06\u7d22\u5f15\u547d\u540d\u4e3a idx_name_last\uff0c\u8868\u793a\u5bf9 name \u548c last \u5217\u521b\u5efa\u7684\u7d22\u5f15\u3002 \u521b\u5efa\u7d22\u5f15 \u521b\u5efa\u7d22\u5f15\u540e\uff0cMySQL \u4f1a\u81ea\u52a8\u7ef4\u62a4\u7d22\u5f15\u3002\u8fd9\u610f\u5473\u7740\u968f\u7740\u5bf9\u8868\u683c\u8fdb\u884c\u63d2\u5165\u3001\u66f4\u65b0\u548c\u5220\u9664\u64cd\u4f5c\uff0c\u7d22\u5f15\u4e5f\u4f1a\u76f8\u5e94\u66f4\u65b0\u3002 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