{"id":168993,"date":"2024-11-06T17:59:23","date_gmt":"2024-11-06T09:59:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/168993\/"},"modified":"2024-11-06T17:59:24","modified_gmt":"2024-11-06T09:59:24","slug":"%e9%9d%a2%e8%a9%a6%e5%ae%98%e5%95%8f%e6%88%91mysql%e7%b4%a2%e5%bc%95%e5%a4%b1%e6%95%88%e6%80%8e%e9%ba%bc%e6%8e%92%e6%9f%a5%ef%bc%9f%e6%87%b5%e9%80%bc%e4%ba%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/168993\/","title":{"rendered":"\u9762\u8a66\u5b98\u554f\u6211MySQL\u7d22\u5f15\u5931\u6548\u600e\u9ebc\u6392\u67e5\uff1f\u61f5\u903c\u4e86"},"content":{"rendered":"<h1 id=\"%e9%9d%a2%e8%a9%a6%e5%ae%98%e5%95%8f%e6%88%91mysql%e7%b4%a2%e5%bc%95%e5%a4%b1%e6%95%88%e6%80%8e%e9%ba%bc%e6%8e%92%e6%9f%a5%ef%bc%9f%e6%87%b5%e9%80%bc%e4%ba%86-WGGwWyLhQw\">\u9762\u8a66\u5b98\u554f\u6211MySQL\u7d22\u5f15\u5931\u6548\u600e\u9ebc\u6392\u67e5\uff1f\u61f5\u903c\u4e86<\/h1>\n<p>\u5728\u9762\u8a66\u904e\u7a0b\u4e2d\uff0c\u9762\u8a66\u5b98\u7d93\u5e38\u6703\u554f\u4e00\u4e9b\u6280\u8853\u6027\u554f\u984c\uff0c\u4ee5\u6e2c\u8a66\u61c9\u8058\u8005\u7684\u5be6\u969b\u80fd\u529b\u548c\u89e3\u6c7a\u554f\u984c\u7684\u601d\u7dad\u65b9\u5f0f\u3002\u5176\u4e2d\uff0cMySQL\u7d22\u5f15\u7684\u5931\u6548\u554f\u984c\u662f\u4e00\u500b\u5e38\u898b\u7684\u8003\u984c\u3002\u7d22\u5f15\u662f\u6578\u64da\u5eab\u4e2d\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u7684\u91cd\u8981\u5de5\u5177\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u7d22\u5f15\u53ef\u80fd\u6703\u5931\u6548\uff0c\u5c0e\u81f4\u67e5\u8a62\u6027\u80fd\u4e0b\u964d\u3002\u672c\u6587\u5c07\u63a2\u8a0eMySQL\u7d22\u5f15\u5931\u6548\u7684\u539f\u56e0\u53ca\u5176\u6392\u67e5\u65b9\u6cd5\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e00\u554f\u984c\u3002<\/p>\n<h2 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id=\"%e7%b4%a2%e5%bc%95%e5%a4%b1%e6%95%88%e7%9a%84%e5%b8%b8%e8%a6%8b%e5%8e%9f%e5%9b%a0-WGGwWyLhQw\">\u7d22\u5f15\u5931\u6548\u7684\u5e38\u898b\u539f\u56e0<\/h2>\n<ul>\n<li><strong>\u4e0d\u7576\u7684\u67e5\u8a62\u689d\u4ef6\uff1a<\/strong>\u5982\u679c\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86\u4e0d\u9069\u5408\u7684\u689d\u4ef6\uff0c\u4f8b\u5982\u4f7f\u7528\u4e86\u4e0d\u7b49\u65bc\uff08\uff09\u6216LIKE\u64cd\u4f5c\u7b26\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u7d22\u5f15\u5931\u6548\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u7576\u67e5\u8a62\u689d\u4ef6\u4e2d\u7684\u6578\u64da\u985e\u578b\u8207\u7d22\u5f15\u7684\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u6642\uff0cMySQL\u53ef\u80fd\u7121\u6cd5\u4f7f\u7528\u7d22\u5f15\u3002<\/li>\n<li><strong>\u51fd\u6578\u7684\u4f7f\u7528\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u51fd\u6578\uff08\u5982DATE()\u3001UPPER()\u7b49\uff09\u6703\u5c0e\u81f4\u7d22\u5f15\u5931\u6548\uff0c\u56e0\u70ba\u9019\u6a23\u6703\u4f7f\u5f97\u7d22\u5f15\u7121\u6cd5\u76f4\u63a5\u61c9\u7528\u65bc\u67e5\u8a62\u3002<\/li>\n<li><strong>OR\u689d\u4ef6\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528OR\u689d\u4ef6\u6642\uff0cMySQL\u53ef\u80fd\u7121\u6cd5\u6709\u6548\u5229\u7528\u7d22\u5f15\uff0c\u7279\u5225\u662f\u7576OR\u7684\u5169\u908a\u689d\u4ef6\u4f7f\u7528\u4e86\u4e0d\u540c\u7684\u7d22\u5f15\u6642\u3002<\/li>\n<li><strong>\u96b1\u5f0f\u8f49\u63db\uff1a<\/strong>\u5982\u679c\u67e5\u8a62\u4e2d\u6d89\u53ca\u5230\u96b1\u5f0f\u985e\u578b\u8f49\u63db\uff0c\u9019\u4e5f\u53ef\u80fd\u5c0e\u81f4\u7d22\u5f15\u5931\u6548\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e6%8e%92%e6%9f%a5%e7%b4%a2%e5%bc%95%e5%a4%b1%e6%95%88%e5%95%8f%e9%a1%8c-WGGwWyLhQw\">\u5982\u4f55\u6392\u67e5\u7d22\u5f15\u5931\u6548\u554f\u984c<\/h2>\n<p>\u7576\u9762\u5c0d\u7d22\u5f15\u5931\u6548\u7684\u554f\u984c\u6642\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\u6392\u67e5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8explain%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2-WGGwWyLhQw\">1. \u4f7f\u7528EXPLAIN\u5206\u6790\u67e5\u8a62<\/h3>\n<p>\u4f7f\u7528EXPLAIN\u8a9e\u53e5\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u4e86\u89e3MySQL\u662f\u5982\u4f55\u57f7\u884c\u67e5\u8a62\u7684\u3002\u901a\u904e\u5206\u6790EXPLAIN\u7684\u8f38\u51fa\uff0c\u6211\u5011\u53ef\u4ee5\u770b\u5230\u662f\u5426\u4f7f\u7528\u4e86\u7d22\u5f15\uff0c\u4ee5\u53ca\u4f7f\u7528\u4e86\u54ea\u500b\u7d22\u5f15\u3002<\/p>\n<pre><code>EXPLAIN SELECT * FROM your_table WHERE your_condition;<\/code><\/pre>\n<h3 id=\"2-%e6%aa%a2%e6%9f%a5%e6%9f%a5%e8%a9%a2%e6%a2%9d%e4%bb%b6-WGGwWyLhQw\">2. \u6aa2\u67e5\u67e5\u8a62\u689d\u4ef6<\/h3>\n<p>\u4ed4\u7d30\u6aa2\u67e5\u67e5\u8a62\u4e2d\u7684\u689d\u4ef6\uff0c\u78ba\u4fdd\u5b83\u5011\u662f\u9069\u5408\u7d22\u5f15\u7684\u3002\u4f8b\u5982\uff0c\u907f\u514d\u4f7f\u7528\u4e0d\u7b49\u65bc\u3001LIKE\u7b49\u64cd\u4f5c\u7b26\uff0c\u4e26\u78ba\u4fdd\u6578\u64da\u985e\u578b\u5339\u914d\u3002<\/p>\n<h3 id=\"3-%e5%84%aa%e5%8c%96%e7%b4%a2%e5%bc%95%e8%a8%ad%e8%a8%88-WGGwWyLhQw\">3. \u512a\u5316\u7d22\u5f15\u8a2d\u8a08<\/h3>\n<p>\u6839\u64da\u67e5\u8a62\u7684\u7279\u9ede\uff0c\u8003\u616e\u662f\u5426\u9700\u8981\u8abf\u6574\u7d22\u5f15\u7684\u8a2d\u8a08\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u8003\u616e\u6dfb\u52a0\u8907\u5408\u7d22\u5f15\u4f86\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<h3 id=\"4-%e6%b8%ac%e8%a9%a6%e4%b8%8d%e5%90%8c%e7%9a%84%e6%9f%a5%e8%a9%a2%e6%96%b9%e5%bc%8f-WGGwWyLhQw\">4. \u6e2c\u8a66\u4e0d\u540c\u7684\u67e5\u8a62\u65b9\u5f0f<\/h3>\n<p>\u5617\u8a66\u91cd\u5beb\u67e5\u8a62\uff0c\u4f7f\u7528\u4e0d\u540c\u7684\u689d\u4ef6\u7d44\u5408\uff0c\u89c0\u5bdf\u67e5\u8a62\u6027\u80fd\u7684\u8b8a\u5316\u3002\u9019\u6709\u52a9\u65bc\u627e\u51fa\u6700\u512a\u7684\u67e5\u8a62\u65b9\u5f0f\u3002<\/p>\n<h3 id=\"5-%e7%9b%a3%e6%8e%a7%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%a7%e8%83%bd-WGGwWyLhQw\">5. \u76e3\u63a7\u6578\u64da\u5eab\u6027\u80fd<\/h3>\n<p>\u4f7f\u7528\u6578\u64da\u5eab\u6027\u80fd\u76e3\u63a7\u5de5\u5177\uff0c\u6301\u7e8c\u76e3\u63a7\u67e5\u8a62\u6027\u80fd\uff0c\u53ca\u6642\u767c\u73fe\u548c\u89e3\u6c7a\u7d22\u5f15\u5931\u6548\u554f\u984c\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-WGGwWyLhQw\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u7d22\u5f15\u5931\u6548\u662f\u4e00\u500b\u5e38\u898b\u7684\u6027\u80fd\u554f\u984c\uff0c\u4e86\u89e3\u5176\u539f\u56e0\u548c\u6392\u67e5\u65b9\u6cd5\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u8005\u548c\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528EXPLAIN\u5206\u6790\u67e5\u8a62\u3001\u6aa2\u67e5\u67e5\u8a62\u689d\u4ef6\u3001\u512a\u5316\u7d22\u5f15\u8a2d\u8a08\u7b49\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6392\u67e5\u548c\u89e3\u6c7a\u7d22\u5f15\u5931\u6548\u554f\u984c\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6027\u80fd\u6578\u64da\u5eab\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">VPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u89e3\u6c7a\u65b9\u6848\u4e5f\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u7a69\u5b9a\u6027\u548c\u9ad8\u6548\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9762\u8a66\u5b98\u554f\u6211MySQL\u7d22\u5f15\u5931\u6548\u7684\u6392\u67e5\u65b9\u6cd5\uff0c\u8b93\u6211\u611f\u5230\u56f0\u60d1\u3002\u4e86\u89e3\u5e38\u898b\u539f\u56e0\u53ca\u89e3\u6c7a\u65b9\u6848\uff0c\u63d0\u5347\u9762\u8a66\u8868\u73fe\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-168993","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168993","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=168993"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168993\/revisions"}],"predecessor-version":[{"id":168994,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/168993\/revisions\/168994"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=168993"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=168993"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=168993"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}