{"id":74715,"date":"2024-10-15T22:47:16","date_gmt":"2024-10-15T14:47:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/74715\/"},"modified":"2024-10-15T22:47:16","modified_gmt":"2024-10-15T14:47:16","slug":"mysql-query%e6%99%82%e9%96%93%e9%83%bd%e5%8e%bb%e5%93%aa%e5%85%92%e4%ba%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/74715\/","title":{"rendered":"MySQL Query\u6642\u9593\u90fd\u53bb\u54ea\u5152\u4e86"},"content":{"rendered":"<h1 id=\"mysql-query%e6%99%82%e9%96%93%e9%83%bd%e5%8e%bb%e5%93%aa%e5%85%92%e4%ba%86-MqwuMqLLkt\">MySQL Query\u6642\u9593\u90fd\u53bb\u54ea\u5152\u4e86<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0cMySQL\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u7136\u800c\uff0c\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\u548c\u67e5\u8a62\u7684\u8907\u96dc\u6027\u589e\u52a0\uff0c\u8a31\u591a\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u5e38\u5e38\u6703\u9762\u81e8\u4e00\u500b\u554f\u984c\uff1aMySQL\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u70ba\u4f55\u5982\u6b64\u6f2b\u9577\uff1f\u672c\u6587\u5c07\u63a2\u8a0e\u5f71\u97ffMySQL\u67e5\u8a62\u6027\u80fd\u7684\u56e0\u7d20\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u512a\u5316\u5efa\u8b70\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd%e7%9a%84%e5%bd%b1%e9%9f%bf%e5%9b%a0%e7%b4%a0-MqwuMqLLkt\">\u67e5\u8a62\u6027\u80fd\u7684\u5f71\u97ff\u56e0\u7d20<\/h2>\n<p>MySQL\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u53d7\u5230\u591a\u7a2e\u56e0\u7d20\u7684\u5f71\u97ff\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u4e3b\u8981\u56e0\u7d20\uff1a<\/p>\n<ul>\n<li><strong>\u6578\u64da\u91cf\uff1a<\/strong>\u96a8\u8457\u6578\u64da\u5eab\u4e2d\u6578\u64da\u91cf\u7684\u589e\u52a0\uff0c\u67e5\u8a62\u6240\u9700\u7684\u6642\u9593\u4e5f\u6703\u96a8\u4e4b\u589e\u52a0\u3002\u7279\u5225\u662f\u5728\u6c92\u6709\u9069\u7576\u7d22\u5f15\u7684\u60c5\u6cc1\u4e0b\uff0c\u67e5\u8a62\u6027\u80fd\u6703\u53d7\u5230\u56b4\u91cd\u5f71\u97ff\u3002<\/li>\n<li><strong>\u7d22\u5f15\uff1a<\/strong>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u7684\u95dc\u9375\u3002\u7f3a\u4e4f\u7d22\u5f15\u6216\u4e0d\u7576\u4f7f\u7528\u7d22\u5f15\u90fd\u6703\u5c0e\u81f4\u67e5\u8a62\u901f\u5ea6\u8b8a\u6162\u3002\u4f7f\u7528\u9069\u7576\u7684\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u3002<\/li>\n<li><strong>\u67e5\u8a62\u7d50\u69cb\uff1a<\/strong>\u67e5\u8a62\u7684\u5beb\u6cd5\u4e5f\u6703\u5f71\u97ff\u6027\u80fd\u3002\u8907\u96dc\u7684JOIN\u64cd\u4f5c\u3001\u5b50\u67e5\u8a62\u4ee5\u53ca\u4e0d\u5fc5\u8981\u7684SELECT\u5b57\u6bb5\u90fd\u53ef\u80fd\u5c0e\u81f4\u67e5\u8a62\u8b8a\u6162\u3002<\/li>\n<li><strong>\u786c\u9ad4\u8cc7\u6e90\uff1a<\/strong>\u4f3a\u670d\u5668\u7684\u786c\u9ad4\u914d\u7f6e\uff0c\u5982CPU\u3001\u5167\u5b58\u548c\u78c1\u789fI\/O\u901f\u5ea6\uff0c\u5c0d\u67e5\u8a62\u6027\u80fd\u4e5f\u6709\u76f4\u63a5\u5f71\u97ff\u3002\u8cc7\u6e90\u4e0d\u8db3\u6703\u5c0e\u81f4\u67e5\u8a62\u57f7\u884c\u7de9\u6162\u3002<\/li>\n<li><strong>\u6578\u64da\u5eab\u914d\u7f6e\uff1a<\/strong>MySQL\u7684\u914d\u7f6e\u53c3\u6578\uff0c\u5982\u7de9\u885d\u6c60\u5927\u5c0f\u3001\u67e5\u8a62\u7de9\u5b58\u7b49\uff0c\u5c0d\u6027\u80fd\u4e5f\u6709\u91cd\u8981\u5f71\u97ff\u3002\u9069\u7576\u7684\u914d\u7f6e\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%84%aa%e5%8c%96mysql%e6%9f%a5%e8%a9%a2-MqwuMqLLkt\">\u5982\u4f55\u512a\u5316MySQL\u67e5\u8a62<\/h2>\n<p>\u70ba\u4e86\u63d0\u9ad8MySQL\u67e5\u8a62\u7684\u6027\u80fd\uff0c\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u7a2e\u512a\u5316\u7b56\u7565\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95-MqwuMqLLkt\">1. \u4f7f\u7528\u7d22\u5f15<\/h3>\n<p>\u78ba\u4fdd\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5b57\u6bb5\u4e0a\u5efa\u7acb\u7d22\u5f15\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\u4f86\u5275\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE INDEX idx_column_name ON table_name (column_name);<\/code><\/pre>\n<h3 id=\"2-%e7%b0%a1%e5%8c%96%e6%9f%a5%e8%a9%a2-MqwuMqLLkt\">2. \u7c21\u5316\u67e5\u8a62<\/h3>\n<p>\u907f\u514d\u4f7f\u7528\u904e\u65bc\u8907\u96dc\u7684\u67e5\u8a62\uff0c\u7279\u5225\u662f\u591a\u5c64\u5d4c\u5957\u7684\u5b50\u67e5\u8a62\u3002\u53ef\u4ee5\u8003\u616e\u5c07\u8907\u96dc\u67e5\u8a62\u62c6\u5206\u70ba\u591a\u500b\u7c21\u55ae\u67e5\u8a62\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8explain%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2-MqwuMqLLkt\">3. \u4f7f\u7528EXPLAIN\u5206\u6790\u67e5\u8a62<\/h3>\n<p>\u4f7f\u7528EXPLAIN\u8a9e\u53e5\u4f86\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u627e\u51fa\u6027\u80fd\u74f6\u9838\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>EXPLAIN SELECT * FROM table_name WHERE condition;<\/code><\/pre>\n<h3 id=\"4-%e8%aa%bf%e6%95%b4%e6%95%b8%e6%93%9a%e5%ba%ab%e9%85%8d%e7%bd%ae-MqwuMqLLkt\">4. \u8abf\u6574\u6578\u64da\u5eab\u914d\u7f6e<\/h3>\n<p>\u6839\u64da\u5be6\u969b\u9700\u6c42\u8abf\u6574MySQL\u7684\u914d\u7f6e\u53c3\u6578\uff0c\u4f8b\u5982\u589e\u52a0\u7de9\u885d\u6c60\u5927\u5c0f\uff0c\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<h3 id=\"5-%e5%ae%9a%e6%9c%9f%e7%b6%ad%e8%ad%b7%e6%95%b8%e6%93%9a%e5%ba%ab-MqwuMqLLkt\">5. \u5b9a\u671f\u7dad\u8b77\u6578\u64da\u5eab<\/h3>\n<p>\u5b9a\u671f\u57f7\u884cOPTIMIZE TABLE\u548cANALYZE TABLE\u547d\u4ee4\uff0c\u4ee5\u4fdd\u6301\u6578\u64da\u5eab\u7684\u5065\u5eb7\u72c0\u614b\uff0c\u4e26\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-MqwuMqLLkt\">\u7d50\u8ad6<\/h2>\n<p>MySQL\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u53d7\u591a\u7a2e\u56e0\u7d20\u5f71\u97ff\uff0c\u5305\u62ec\u6578\u64da\u91cf\u3001\u7d22\u5f15\u3001\u67e5\u8a62\u7d50\u69cb\u3001\u786c\u9ad4\u8cc7\u6e90\u548c\u6578\u64da\u5eab\u914d\u7f6e\u3002\u901a\u904e\u9069\u7576\u7684\u512a\u5316\u7b56\u7565\uff0c\u5982\u4f7f\u7528\u7d22\u5f15\u3001\u7c21\u5316\u67e5\u8a62\u3001\u5206\u6790\u57f7\u884c\u8a08\u5283\u3001\u8abf\u6574\u914d\u7f6e\u548c\u5b9a\u671f\u7dad\u8b77\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u4f3a\u670d\u5668\u74b0\u5883\u4e5f\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u4e86\u89e3\u5982\u4f55\u512a\u5316MySQL\u67e5\u8a62\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u7cfb\u7d71\u7684\u6027\u80fd\uff0c\u5f9e\u800c\u66f4\u597d\u5730\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002\u5982\u679c\u60a8\u5c0d\u65bc\u4f3a\u670d\u5668\u9078\u64c7\u6709\u8208\u8da3\uff0c\u53ef\u4ee5\u8003\u616e\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u70ba\u60a8\u7684\u6578\u64da\u5eab\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Discover how to optimize MySQL query performance and understand where time is spent in your database operations for improved efficiency.<\/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-74715","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74715","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=74715"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74715\/revisions"}],"predecessor-version":[{"id":74716,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/74715\/revisions\/74716"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=74715"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=74715"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=74715"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}