{"id":162959,"date":"2024-11-04T19:28:19","date_gmt":"2024-11-04T11:28:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/162959\/"},"modified":"2024-11-04T19:28:20","modified_gmt":"2024-11-04T11:28:20","slug":"%e6%95%99%e6%82%a8%e5%a6%82%e4%bd%95%e7%82%bamysql%e8%a1%a8%e8%81%af%e7%b5%90%e5%81%9a%e7%b4%a2%e5%bc%95%e8%ae%93%e8%a1%a8%e8%81%af%e7%b5%90%e6%9b%b4%e6%9c%89%e6%95%88%e7%8e%87%ef%bc%88%e8%ad%af","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/162959\/","title":{"rendered":"\u6559\u60a8\u5982\u4f55\u70baMYSQL\u8868\u806f\u7d50\u505a\u7d22\u5f15\u8b93\u8868\u806f\u7d50\u66f4\u6709\u6548\u7387\uff08\u8b6f\u6587\uff09"},"content":{"rendered":"<h1 id=\"%e6%95%99%e6%82%a8%e5%a6%82%e4%bd%95%e7%82%bamysql%e8%a1%a8%e8%81%af%e7%b5%90%e5%81%9a%e7%b4%a2%e5%bc%95%e8%ae%93%e8%a1%a8%e8%81%af%e7%b5%90%e6%9b%b4%e6%9c%89%e6%95%88%e7%8e%87-FrRwWPMImB\">\u6559\u60a8\u5982\u4f55\u70baMYSQL\u8868\u806f\u7d50\u505a\u7d22\u5f15\u8b93\u8868\u806f\u7d50\u66f4\u6709\u6548\u7387<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u7576\u6d89\u53ca\u5230\u591a\u500b\u8868\u4e4b\u9593\u7684\u806f\u7d50\u6642\uff0c\u6027\u80fd\u512a\u5316\u8b8a\u5f97\u81f3\u95dc\u91cd\u8981\u3002\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u7684\u95dc\u9375\u5de5\u5177\u4e4b\u4e00\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u70baMySQL\u8868\u806f\u7d50\u5275\u5efa\u7d22\u5f15\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u3002<\/p>\n<h2 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id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e7%82%ba%e8%81%af%e7%b5%90%e5%89%b5%e5%bb%ba%e7%b4%a2%e5%bc%95%ef%bc%9f-FrRwWPMImB\">\u70ba\u4ec0\u9ebc\u9700\u8981\u70ba\u806f\u7d50\u5275\u5efa\u7d22\u5f15\uff1f<\/h2>\n<p>\u5728\u9032\u884c\u8868\u806f\u7d50\u6642\uff0c\u6578\u64da\u5eab\u9700\u8981\u6bd4\u8f03\u591a\u500b\u8868\u4e2d\u7684\u6578\u64da\u3002\u5982\u679c\u6c92\u6709\u7d22\u5f15\uff0c\u6578\u64da\u5eab\u5c07\u9032\u884c\u5168\u8868\u6383\u63cf\uff0c\u9019\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002\u901a\u904e\u70ba\u806f\u7d50\u7684\u5217\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u6642\u9593\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e7%82%bamysql%e8%a1%a8%e8%81%af%e7%b5%90%e5%89%b5%e5%bb%ba%e7%b4%a2%e5%bc%95-FrRwWPMImB\">\u5982\u4f55\u70baMySQL\u8868\u806f\u7d50\u5275\u5efa\u7d22\u5f15<\/h2>\n<h3 id=\"1-%e7%a2%ba%e5%ae%9a%e9%9c%80%e8%a6%81%e7%b4%a2%e5%bc%95%e7%9a%84%e5%88%97-FrRwWPMImB\">1. \u78ba\u5b9a\u9700\u8981\u7d22\u5f15\u7684\u5217<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u78ba\u5b9a\u54ea\u4e9b\u5217\u5c07\u7528\u65bc\u806f\u7d50\u3002\u901a\u5e38\uff0c\u9019\u4e9b\u5217\u662f\u5916\u9375\u6216\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u5217\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u6709\u5169\u500b\u8868\uff1a<code>orders<\/code>\u548c<code>customers<\/code>\uff0c\u4e26\u4e14\u5b83\u5011\u901a\u904e<code>customer_id<\/code>\u5217\u806f\u7d50\uff0c\u90a3\u9ebc\u60a8\u61c9\u8a72\u8003\u616e\u70ba<code>customer_id<\/code>\u5217\u5275\u5efa\u7d22\u5f15\u3002<\/p>\n<h3 id=\"2-%e5%89%b5%e5%bb%ba%e7%b4%a2%e5%bc%95-FrRwWPMImB\">2. \u5275\u5efa\u7d22\u5f15<\/h3>\n<p>\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u70ba\u6307\u5b9a\u7684\u5217\u5275\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE INDEX idx_customer_id ON orders(customer_id);<\/code><\/pre>\n<p>\u9019\u689d\u8a9e\u53e5\u5c07\u5728<code>orders<\/code>\u8868\u7684<code>customer_id<\/code>\u5217\u4e0a\u5275\u5efa\u4e00\u500b\u540d\u70ba<code>idx_customer_id<\/code>\u7684\u7d22\u5f15\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e8%a4%87%e5%90%88%e7%b4%a2%e5%bc%95-FrRwWPMImB\">3. \u4f7f\u7528\u8907\u5408\u7d22\u5f15<\/h3>\n<p>\u5982\u679c\u60a8\u7684\u67e5\u8a62\u6d89\u53ca\u591a\u500b\u5217\uff0c\u5247\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u8907\u5408\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u7d93\u5e38\u6839\u64da<code>customer_id<\/code>\u548c<code>order_date<\/code>\u9032\u884c\u67e5\u8a62\uff0c\u5247\u53ef\u4ee5\u5275\u5efa\u4e00\u500b\u8907\u5408\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE INDEX idx_customer_order ON orders(customer_id, order_date);<\/code><\/pre>\n<h3 id=\"4-%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-FrRwWPMImB\">4. \u5206\u6790\u67e5\u8a62\u6027\u80fd<\/h3>\n<p>\u5275\u5efa\u7d22\u5f15\u5f8c\uff0c\u60a8\u61c9\u8a72\u4f7f\u7528<code>EXPLAIN<\/code>\u8a9e\u53e5\u4f86\u5206\u6790\u67e5\u8a62\u6027\u80fd\u3002\u9019\u5c07\u5e6b\u52a9\u60a8\u4e86\u89e3\u7d22\u5f15\u662f\u5426\u88ab\u6b63\u78ba\u4f7f\u7528\uff1a<\/p>\n<pre><code>EXPLAIN SELECT * FROM orders o JOIN customers c ON o.customer_id = c.id WHERE o.order_date &gt; '2023-01-01';<\/code><\/pre>\n<p>\u901a\u904e\u5206\u6790\u7d50\u679c\uff0c\u60a8\u53ef\u4ee5\u78ba\u5b9a\u7d22\u5f15\u662f\u5426\u63d0\u9ad8\u4e86\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-FrRwWPMImB\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u64cd\u4f5c\u7684\u6027\u80fd\uff0c\u56e0\u6b64\u61c9\u8b39\u614e\u9078\u64c7\u9700\u8981\u7d22\u5f15\u7684\u5217\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u7dad\u8b77\u7d22\u5f15\uff0c\u4ee5\u78ba\u4fdd\u5176\u6709\u6548\u6027\u548c\u6027\u80fd\u3002<\/li>\n<li>\u4f7f\u7528<code>ANALYZE TABLE<\/code>\u547d\u4ee4\u4f86\u66f4\u65b0\u7d22\u5f15\u7d71\u8a08\u4fe1\u606f\uff0c\u5e6b\u52a9\u512a\u5316\u67e5\u8a62\u8a08\u5283\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FrRwWPMImB\">\u7e3d\u7d50<\/h2>\n<p>\u70baMySQL\u8868\u806f\u7d50\u5275\u5efa\u7d22\u5f15\u662f\u4e00\u500b\u6709\u6548\u7684\u6027\u80fd\u512a\u5316\u7b56\u7565\u3002\u901a\u904e\u6b63\u78ba\u5730\u9078\u64c7\u7d22\u5f15\u5217\u548c\u4f7f\u7528\u8907\u5408\u7d22\u5f15\uff0c\u60a8\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u5b9a\u671f\u5206\u6790\u548c\u7dad\u8b77\u7d22\u5f15\u5c07\u6709\u52a9\u65bc\u4fdd\u6301\u6578\u64da\u5eab\u7684\u9ad8\u6548\u904b\u884c\u3002\u5982\u679c\u60a8\u9700\u8981\u66f4\u591a\u6709\u95dc<code>VPS<\/code>\u6216<code>\u9999\u6e2fVPS<\/code>\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u4e86\u89e3\u66f4\u591a\u95dc\u65bc<code>\u4e91\u670d\u52a1\u5668<\/code>\u548c<code>\u9999\u6e2f\u670d\u52a1\u5668<\/code>\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u70baMySQL\u8868\u806f\u7d50\u5275\u5efa\u7d22\u5f15\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u548c\u6027\u80fd\uff0c\u512a\u5316\u6578\u64da\u5eab\u64cd\u4f5c\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-162959","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162959","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=162959"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162959\/revisions"}],"predecessor-version":[{"id":162960,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/162959\/revisions\/162960"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=162959"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=162959"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=162959"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}