{"id":6350,"date":"2024-11-14T12:10:41","date_gmt":"2024-11-14T04:10:41","guid":{"rendered":"https:\/\/fwq.ai\/blog\/6350\/"},"modified":"2024-11-14T12:10:41","modified_gmt":"2024-11-14T04:10:41","slug":"mysql%e5%bb%ba%e7%ab%8b%e7%b4%a2%e5%bc%95%e8%bf%87%e7%a8%8b%e8%af%a6%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/6350\/","title":{"rendered":"mysql\u5efa\u7acb\u7d22\u5f15\u8fc7\u7a0b\u8be6\u89e3"},"content":{"rendered":"<blockquote><p>\n  mysql \u5efa\u7acb\u7d22\u5f15\u7684\u6d41\u7a0b\uff1a\u9009\u62e9\u8981\u7d22\u5f15\u7684\u5217\uff0c\u5305\u62ec\u7ecf\u5e38\u67e5\u8be2\u3001\u4e3b\u952e\u548c\u5916\u952e\u7684\u5217\u3002\u6839\u636e\u9700\u8981\u9009\u62e9 b-tree\u3001\u54c8\u5e0c\u6216\u5168\u6587\u7d22\u5f15\u7c7b\u578b\u3002\u4f7f\u7528 create index \u8bed\u53e5\u521b\u5efa\u7d22\u5f15\u3002mysql \u901a\u8fc7\u626b\u63cf\u8868\u3001\u521b\u5efa\u7d22\u5f15\u7ed3\u6784\u548c\u63d2\u5165\u503c\u6765\u6784\u5efa\u7d22\u5f15\u3002\u7d22\u5f15\u901a\u8fc7\u63d2\u5165\u3001\u66f4\u65b0\u548c\u5220\u9664\u64cd\u4f5c\u6765\u7ef4\u62a4\u3002\u4f18\u5316\u7d22\u5f15\u5305\u62ec\u788e\u7247\u6574\u7406\u3001\u5220\u9664\u672a\u4f7f\u7528\u7684\u7d22\u5f15\u548c\u76d1\u63a7\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\u3002\n<\/p><\/blockquote>\n<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/202408\/01\/2024080102434639698.jpg\" class=\"aligncenter\" title=\"mysql\u5efa\u7acb\u7d22\u5f15\u8fc7\u7a0b\u8be6\u89e3\u63d2\u56fe\" alt=\"mysql\u5efa\u7acb\u7d22\u5f15\u8fc7\u7a0b\u8be6\u89e3\u63d2\u56fe\" \/><\/p>\n<h2>MySQL \u5efa\u7acb\u7d22\u5f15\u8fc7\u7a0b\u8be6\u89e3<\/h2>\n<p><strong>\u5f15\u8a00\uff1a<\/strong><br \/>\u7d22\u5f15\u662f MySQL \u4e2d\u63d0\u5347\u6570\u636e\u67e5\u8be2\u6027\u80fd\u7684\u5173\u952e\u6280\u672f\u4e4b\u4e00\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd MySQL \u5efa\u7acb\u7d22\u5f15\u7684\u6574\u4e2a\u8fc7\u7a0b\u3002<\/p>\n<p><strong>1. \u9009\u62e9\u8981\u5efa\u7acb\u7d22\u5f15\u7684\u5217<\/strong><br \/>\u9996\u5148\uff0c\u9700\u8981\u786e\u5b9a\u54ea\u4e9b\u5217\u9700\u8981\u5efa\u7acb\u7d22\u5f15\u3002\u901a\u5e38\uff0c\u9891\u7e41\u67e5\u8be2\u7684\u5217\u3001\u4e3b\u952e\u5217\u548c\u5916\u952e\u5217\u90fd\u662f\u5efa\u7acb\u7d22\u5f15\u7684\u826f\u597d\u5019\u9009\u8005\u3002<\/p>\n<p><strong>2. \u9009\u62e9\u7d22\u5f15\u7c7b\u578b<\/strong><br \/>MySQL \u4e2d\u6709\u51e0\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5305\u62ec B-Tree \u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u548c\u5168\u6587\u7d22\u5f15\u3002\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7c7b\u578b\u5bf9\u4e8e\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p><strong>3. \u521b\u5efa\u7d22\u5f15<\/strong><br \/>\u4f7f\u7528 CREATE INDEX \u8bed\u53e5\u521b\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre>CREATE INDEX &lt;\u7d22\u5f15\u540d\u79f0&gt; ON &lt;\u8868\u540d&gt; (&lt;\u5217\u540d&gt;);<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p><strong>4. \u7d22\u5f15\u6784\u5efa<\/strong><br \/>\u5f53\u521b\u5efa\u7d22\u5f15\u65f6\uff0cMySQL \u5c06\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n<ul>\n<li>\u626b\u63cf\u8868\u5e76\u6536\u96c6\u7d22\u5f15\u5217\u7684\u503c\u3002<\/li>\n<li>\u521b\u5efa\u4e00\u4e2a\u7d22\u5f15\u7ed3\u6784\uff08\u4f8b\u5982 B-Tree\uff09\u3002<\/li>\n<li>\u5c06\u7d22\u5f15\u5217\u7684\u503c\u63d2\u5165\u5230\u7d22\u5f15\u7ed3\u6784\u4e2d\u3002<\/li>\n<\/ul>\n<p><strong>5. \u6570\u636e\u66f4\u65b0\u548c\u7d22\u5f15\u7ef4\u62a4<\/strong><br \/>\u5f53\u5bf9\u8868\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u66f4\u65b0\u65f6\uff0c\u7d22\u5f15\u4e5f\u9700\u8981\u8fdb\u884c\u66f4\u65b0\u3002MySQL \u4f7f\u7528\u4ee5\u4e0b\u6280\u672f\u7ef4\u62a4\u7d22\u5f15\uff1a<\/p>\n<ul>\n<li> <strong>\u63d2\u5165\uff1a<\/strong>\u63d2\u5165\u65b0\u884c\u7684\u7d22\u5f15\u503c\u65f6\uff0c\u5c06\u5176\u6dfb\u52a0\u5230\u7d22\u5f15\u7ed3\u6784\u4e2d\u3002<\/li>\n<li> <strong>\u66f4\u65b0\uff1a<\/strong>\u66f4\u65b0\u73b0\u6709\u884c\u65f6\uff0c\u4fee\u6539\u5176\u7d22\u5f15\u503c\u5e76\u66f4\u65b0\u7d22\u5f15\u7ed3\u6784\u4e2d\u7684\u4f4d\u7f6e\u3002<\/li>\n<li> <strong>\u5220\u9664\uff1a<\/strong>\u5220\u9664\u884c\u65f6\uff0c\u4ece\u7d22\u5f15\u7ed3\u6784\u4e2d\u5220\u9664\u5176\u7d22\u5f15\u503c\u3002<\/li>\n<\/ul>\n<p><strong>6. \u4f18\u5316\u7d22\u5f15<\/strong><br \/>\u7d22\u5f15\u7684\u6027\u80fd\u53ef\u80fd\u4f1a\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\u800c\u4e0b\u964d\uff0c\u56e0\u6b64\u4f18\u5316\u5b83\u4eec\u4ee5\u83b7\u5f97\u6700\u4f73\u6027\u80fd\u975e\u5e38\u91cd\u8981\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6280\u672f\uff1a<\/p>\n<ul>\n<li> <strong>\u7d22\u5f15\u788e\u7247\u6574\u7406\uff1a<\/strong>\u91cd\u65b0\u7ec4\u7ec7\u7d22\u5f15\u7ed3\u6784\u4ee5\u63d0\u9ad8\u8bbf\u95ee\u6548\u7387\u3002<\/li>\n<li> <strong>\u5220\u9664\u672a\u4f7f\u7528\u7684\u7d22\u5f15\uff1a<\/strong>\u5220\u9664\u4e0d\u518d\u9700\u8981\u7684\u7d22\u5f15\u4ee5\u91ca\u653e\u8d44\u6e90\u3002<\/li>\n<li> <strong>\u76d1\u63a7\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\uff1a<\/strong>\u4f7f\u7528 SHOW INDEX \u8bed\u53e5\u76d1\u63a7\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\u5e76\u6839\u636e\u9700\u8981\u8fdb\u884c\u8c03\u6574\u3002<\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba\uff1a<\/strong><br \/>\u5efa\u7acb\u7d22\u5f15\u662f\u4e00\u4e2a\u591a\u6b65\u9aa4\u7684\u8fc7\u7a0b\uff0c\u9700\u8981\u8003\u8651\u9009\u62e9\u8981\u7d22\u5f15\u7684\u5217\u3001\u7d22\u5f15\u7c7b\u578b\u548c\u7d22\u5f15\u7ef4\u62a4\u6210\u672c\u3002\u901a\u8fc7\u9075\u5faa\u6700\u4f73\u5b9e\u8df5\u5e76\u9002\u5f53\u4f18\u5316\u7d22\u5f15\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8 MySQL \u67e5\u8be2\u7684\u6027\u80fd\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5efa\u7acb\u7d22\u5f15\u8fc7\u7a0b\u8be6\u89e3\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 \u5efa\u7acb\u7d22\u5f15\u7684\u6d41\u7a0b\uff1a\u9009\u62e9\u8981\u7d22\u5f15\u7684\u5217\uff0c\u5305\u62ec\u7ecf\u5e38\u67e5\u8be2\u3001\u4e3b\u952e\u548c\u5916\u952e\u7684\u5217\u3002\u6839\u636e\u9700\u8981\u9009\u62e9 b-tree\u3001\u54c8\u5e0c\u6216\u5168\u6587\u7d22\u5f15\u7c7b\u578b\u3002\u4f7f\u7528 create index \u8bed\u53e5\u521b\u5efa\u7d22\u5f15\u3002mysql \u901a\u8fc7\u626b\u63cf\u8868\u3001\u521b\u5efa\u7d22\u5f15\u7ed3\u6784\u548c\u63d2\u5165\u503c\u6765\u6784\u5efa\u7d22\u5f15\u3002\u7d22\u5f15\u901a\u8fc7\u63d2\u5165\u3001\u66f4\u65b0\u548c\u5220\u9664\u64cd\u4f5c\u6765\u7ef4\u62a4\u3002\u4f18\u5316\u7d22\u5f15\u5305\u62ec\u788e\u7247\u6574\u7406\u3001\u5220\u9664\u672a\u4f7f\u7528\u7684\u7d22\u5f15\u548c\u76d1\u63a7\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\u3002 MySQL \u5efa\u7acb\u7d22\u5f15\u8fc7\u7a0b\u8be6\u89e3 \u5f15\u8a00\uff1a\u7d22\u5f15\u662f MySQL \u4e2d\u63d0\u5347\u6570\u636e\u67e5\u8be2\u6027\u80fd\u7684\u5173\u952e\u6280\u672f\u4e4b\u4e00\u3002\u672c\u6587\u5c06\u8be6\u7ec6\u4ecb\u7ecd MySQL \u5efa\u7acb\u7d22\u5f15\u7684\u6574\u4e2a\u8fc7\u7a0b\u3002 1. \u9009\u62e9\u8981\u5efa\u7acb\u7d22\u5f15\u7684\u5217\u9996\u5148\uff0c\u9700\u8981\u786e\u5b9a\u54ea\u4e9b\u5217\u9700\u8981\u5efa\u7acb\u7d22\u5f15\u3002\u901a\u5e38\uff0c\u9891\u7e41\u67e5\u8be2\u7684\u5217\u3001\u4e3b\u952e\u5217\u548c\u5916\u952e\u5217\u90fd\u662f\u5efa\u7acb\u7d22\u5f15\u7684\u826f\u597d\u5019\u9009\u8005\u3002 2. \u9009\u62e9\u7d22\u5f15\u7c7b\u578bMySQL \u4e2d\u6709\u51e0\u79cd\u4e0d\u540c\u7c7b\u578b\u7684\u7d22\u5f15\uff0c\u5305\u62ec B-Tree \u7d22\u5f15\u3001\u54c8\u5e0c\u7d22\u5f15\u548c\u5168\u6587\u7d22\u5f15\u3002\u9009\u62e9\u5408\u9002\u7684\u7d22\u5f15\u7c7b\u578b\u5bf9\u4e8e\u4f18\u5316\u67e5\u8be2\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002 3. \u521b\u5efa\u7d22\u5f15\u4f7f\u7528 CREATE INDEX \u8bed\u53e5\u521b\u5efa\u7d22\u5f15\uff1a CREATE INDEX &lt;\u7d22\u5f15\u540d\u79f0&gt; ON &lt;\u8868\u540d&gt; (&lt;\u5217\u540d&gt;); \u767b\u5f55\u540e\u590d\u5236 4. \u7d22\u5f15\u6784\u5efa\u5f53\u521b\u5efa\u7d22\u5f15\u65f6\uff0cMySQL \u5c06\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a \u626b\u63cf\u8868\u5e76\u6536\u96c6\u7d22\u5f15\u5217\u7684\u503c\u3002 \u521b\u5efa\u4e00\u4e2a\u7d22\u5f15\u7ed3\u6784\uff08\u4f8b\u5982 B-Tree\uff09\u3002 \u5c06\u7d22\u5f15\u5217\u7684\u503c\u63d2\u5165\u5230\u7d22\u5f15\u7ed3\u6784\u4e2d\u3002 5. \u6570\u636e\u66f4\u65b0\u548c\u7d22\u5f15\u7ef4\u62a4\u5f53\u5bf9\u8868\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u66f4\u65b0\u65f6\uff0c\u7d22\u5f15\u4e5f\u9700\u8981\u8fdb\u884c\u66f4\u65b0\u3002MySQL \u4f7f\u7528\u4ee5\u4e0b\u6280\u672f\u7ef4\u62a4\u7d22\u5f15\uff1a \u63d2\u5165\uff1a\u63d2\u5165\u65b0\u884c\u7684\u7d22\u5f15\u503c\u65f6\uff0c\u5c06\u5176\u6dfb\u52a0\u5230\u7d22\u5f15\u7ed3\u6784\u4e2d\u3002 \u66f4\u65b0\uff1a\u66f4\u65b0\u73b0\u6709\u884c\u65f6\uff0c\u4fee\u6539\u5176\u7d22\u5f15\u503c\u5e76\u66f4\u65b0\u7d22\u5f15\u7ed3\u6784\u4e2d\u7684\u4f4d\u7f6e\u3002 \u5220\u9664\uff1a\u5220\u9664\u884c\u65f6\uff0c\u4ece\u7d22\u5f15\u7ed3\u6784\u4e2d\u5220\u9664\u5176\u7d22\u5f15\u503c\u3002 6. \u4f18\u5316\u7d22\u5f15\u7d22\u5f15\u7684\u6027\u80fd\u53ef\u80fd\u4f1a\u968f\u7740\u65f6\u95f4\u7684\u63a8\u79fb\u800c\u4e0b\u964d\uff0c\u56e0\u6b64\u4f18\u5316\u5b83\u4eec\u4ee5\u83b7\u5f97\u6700\u4f73\u6027\u80fd\u975e\u5e38\u91cd\u8981\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u6280\u672f\uff1a \u7d22\u5f15\u788e\u7247\u6574\u7406\uff1a\u91cd\u65b0\u7ec4\u7ec7\u7d22\u5f15\u7ed3\u6784\u4ee5\u63d0\u9ad8\u8bbf\u95ee\u6548\u7387\u3002 \u5220\u9664\u672a\u4f7f\u7528\u7684\u7d22\u5f15\uff1a\u5220\u9664\u4e0d\u518d\u9700\u8981\u7684\u7d22\u5f15\u4ee5\u91ca\u653e\u8d44\u6e90\u3002 \u76d1\u63a7\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\uff1a\u4f7f\u7528 SHOW INDEX \u8bed\u53e5\u76d1\u63a7\u7d22\u5f15\u4f7f\u7528\u60c5\u51b5\u5e76\u6839\u636e\u9700\u8981\u8fdb\u884c\u8c03\u6574\u3002 \u7ed3\u8bba\uff1a\u5efa\u7acb\u7d22\u5f15\u662f\u4e00\u4e2a\u591a\u6b65\u9aa4\u7684\u8fc7\u7a0b\uff0c\u9700\u8981\u8003\u8651\u9009\u62e9\u8981\u7d22\u5f15\u7684\u5217\u3001\u7d22\u5f15\u7c7b\u578b\u548c\u7d22\u5f15\u7ef4\u62a4\u6210\u672c\u3002\u901a\u8fc7\u9075\u5faa\u6700\u4f73\u5b9e\u8df5\u5e76\u9002\u5f53\u4f18\u5316\u7d22\u5f15\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-6350","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6350","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=6350"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/6350\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=6350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=6350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=6350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}