{"id":190986,"date":"2024-11-12T16:10:22","date_gmt":"2024-11-12T08:10:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/190986\/"},"modified":"2024-11-12T16:10:23","modified_gmt":"2024-11-12T08:10:23","slug":"%e7%b7%9a%e4%b8%8a%e7%b3%bb%e7%b5%b1%e6%9f%a5%e8%a9%a2%e4%b8%80%e6%ac%a1%e8%a6%8110s%ef%bc%8c%e6%88%91%e4%b8%80%e6%80%92%e5%84%aa%e5%8c%96%e4%ba%86%e5%b9%be%e7%99%be%e8%a1%8c%e7%9a%84sql","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/190986\/","title":{"rendered":"\u7dda\u4e0a\u7cfb\u7d71\u67e5\u8a62\u4e00\u6b21\u898110s\uff0c\u6211\u4e00\u6012\u512a\u5316\u4e86\u5e7e\u767e\u884c\u7684SQL"},"content":{"rendered":"<h1 id=\"%e7%b7%9a%e4%b8%8a%e7%b3%bb%e7%b5%b1%e6%9f%a5%e8%a9%a2%e4%b8%80%e6%ac%a1%e8%a6%8110s%ef%bc%8c%e6%88%91%e4%b8%80%e6%80%92%e5%84%aa%e5%8c%96%e4%ba%86%e5%b9%be%e7%99%be%e8%a1%8c%e7%9a%84sql-xtOLuEuWIU\">\u7dda\u4e0a\u7cfb\u7d71\u67e5\u8a62\u4e00\u6b21\u898110s\uff0c\u6211\u4e00\u6012\u512a\u5316\u4e86\u5e7e\u767e\u884c\u7684SQL<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u7dda\u4e0a\u7cfb\u7d71\u7684\u904b\u884c\u81f3\u95dc\u91cd\u8981\u3002\u7576\u7528\u6236\u5728\u67e5\u8a62\u7cfb\u7d71\u6642\uff0c\u82e5\u767c\u73fe\u67e5\u8a62\u901f\u5ea6\u7de9\u6162\uff0c\u9019\u4e0d\u50c5\u5f71\u97ff\u7528\u6236\u9ad4\u9a57\uff0c\u9084\u53ef\u80fd\u5c0e\u81f4\u696d\u52d9\u640d\u5931\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u901a\u904e\u512a\u5316SQL\u67e5\u8a62\u4f86\u63d0\u5347\u7cfb\u7d71\u6027\u80fd\uff0c\u4e26\u5206\u4eab\u4e00\u4e9b\u5be6\u7528\u7684\u512a\u5316\u6280\u5de7\u3002<\/p>\n<h2 id=\"%e5%95%8f%e9%a1%8c%e7%9a%84%e6%a0%b9%e6%ba%90-xtOLuEuWIU\">\u554f\u984c\u7684\u6839\u6e90<\/h2>\n<p>\u5728\u67d0\u6b21\u9805\u76ee\u4e2d\uff0c\u6211\u5011\u7684\u7dda\u4e0a\u7cfb\u7d71\u67e5\u8a62\u6642\u9593\u9577\u905410\u79d2\uff0c\u9019\u8b93\u6211\u611f\u5230\u975e\u5e38\u6cae\u55aa\u3002\u7d93\u904e\u521d\u6b65\u5206\u6790\uff0c\u6211\u767c\u73fe\u554f\u984c\u4e3b\u8981\u51fa\u5728\u4ee5\u4e0b\u5e7e\u500b\u65b9\u9762\uff1a<\/p>\n<ul>\n<li><strong>\u4e0d\u5408\u7406\u7684\u7d22\u5f15\uff1a<\/strong>\u7d22\u5f15\u662f\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u7684\u95dc\u9375\uff0c\u4f46\u904e\u591a\u6216\u4e0d\u7576\u7684\u7d22\u5f15\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\u3002<\/li>\n<li><strong>\u8907\u96dc\u7684\u67e5\u8a62\u8a9e\u53e5\uff1a<\/strong>\u591a\u8868\u806f\u63a5\u548c\u5b50\u67e5\u8a62\u53ef\u80fd\u6703\u4f7f\u67e5\u8a62\u8b8a\u5f97\u8907\u96dc\uff0c\u5f9e\u800c\u5f71\u97ff\u6027\u80fd\u3002<\/li>\n<li><strong>\u6578\u64da\u91cf\u904e\u5927\uff1a<\/strong>\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u67e5\u8a62\u7684\u6548\u7387\u53ef\u80fd\u6703\u4e0b\u964d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%84%aa%e5%8c%96%e7%ad%96%e7%95%a5-xtOLuEuWIU\">\u512a\u5316\u7b56\u7565<\/h2>\n<p>\u70ba\u4e86\u89e3\u6c7a\u9019\u4e9b\u554f\u984c\uff0c\u6211\u958b\u59cb\u8457\u624b\u512a\u5316SQL\u67e5\u8a62\u3002\u4ee5\u4e0b\u662f\u6211\u63a1\u53d6\u7684\u4e00\u4e9b\u5177\u9ad4\u63aa\u65bd\uff1a<\/p>\n<h3 id=\"1-%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2%e8%a8%88%e5%8a%83-xtOLuEuWIU\">1. \u5206\u6790\u67e5\u8a62\u8a08\u5283<\/h3>\n<p>\u4f7f\u7528SQL\u7684EXPLAIN\u547d\u4ee4\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u4e86\u89e3\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\u3002\u9019\u6a23\u53ef\u4ee5\u8b58\u5225\u51fa\u6027\u80fd\u74f6\u9838\uff0c\u4e26\u91dd\u5c0d\u6027\u5730\u9032\u884c\u512a\u5316\u3002<\/p>\n<pre><code>EXPLAIN SELECT * FROM users WHERE age &gt; 30;<\/code><\/pre>\n<h3 id=\"2-%e6%b7%bb%e5%8a%a0%e9%81%a9%e7%95%b6%e7%9a%84%e7%b4%a2%e5%bc%95-xtOLuEuWIU\">2. \u6dfb\u52a0\u9069\u7576\u7684\u7d22\u5f15<\/h3>\n<p>\u6839\u64da\u67e5\u8a62\u7684\u7279\u9ede\uff0c\u70ba\u5e38\u7528\u7684\u67e5\u8a62\u689d\u4ef6\u6dfb\u52a0\u7d22\u5f15\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u7d93\u5e38\u67e5\u8a62\u7684\u201c\u5e74\u9f61\u201d\u5b57\u6bb5\uff0c\u53ef\u4ee5\u9019\u6a23\u6dfb\u52a0\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE INDEX idx_age ON users(age);<\/code><\/pre>\n<h3 id=\"3-%e7%b0%a1%e5%8c%96%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-xtOLuEuWIU\">3. \u7c21\u5316\u67e5\u8a62\u8a9e\u53e5<\/h3>\n<p>\u5c07\u8907\u96dc\u7684\u67e5\u8a62\u62c6\u5206\u70ba\u591a\u500b\u7c21\u55ae\u7684\u67e5\u8a62\uff0c\u4e26\u4f7f\u7528\u81e8\u6642\u8868\u4f86\u5b58\u5132\u4e2d\u9593\u7d50\u679c\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u67e5\u8a62\u7684\u8907\u96dc\u6027\u3002<\/p>\n<pre><code>SELECT * FROM users WHERE age &gt; 30 INTO TEMPORARY TABLE temp_users;<\/code><\/pre>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e5%90%88%e9%81%a9%e7%9a%84%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-xtOLuEuWIU\">4. \u4f7f\u7528\u5408\u9069\u7684\u6578\u64da\u985e\u578b<\/h3>\n<p>\u78ba\u4fdd\u6578\u64da\u5eab\u4e2d\u7684\u5b57\u6bb5\u4f7f\u7528\u5408\u9069\u7684\u6578\u64da\u985e\u578b\uff0c\u9019\u6a23\u53ef\u4ee5\u7bc0\u7701\u5b58\u5132\u7a7a\u9593\u4e26\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002\u4f8b\u5982\uff0c\u5c0d\u65bc\u5e74\u9f61\u9019\u985e\u6574\u6578\u6578\u64da\uff0c\u61c9\u4f7f\u7528INT\u985e\u578b\u800c\u975eVARCHAR\u3002<\/p>\n<h3 id=\"5-%e5%ae%9a%e6%9c%9f%e6%b8%85%e7%90%86%e6%95%b8%e6%93%9a-xtOLuEuWIU\">5. \u5b9a\u671f\u6e05\u7406\u6578\u64da<\/h3>\n<p>\u96a8\u8457\u6642\u9593\u7684\u63a8\u79fb\uff0c\u6578\u64da\u5eab\u4e2d\u53ef\u80fd\u6703\u7a4d\u7d2f\u5927\u91cf\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u3002\u5b9a\u671f\u6e05\u7406\u904e\u671f\u6216\u7121\u7528\u7684\u6578\u64da\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/p>\n<h2 id=\"%e5%84%aa%e5%8c%96%e7%b5%90%e6%9e%9c-xtOLuEuWIU\">\u512a\u5316\u7d50\u679c<\/h2>\n<p>\u7d93\u904e\u5e7e\u5929\u7684\u52aa\u529b\uff0c\u6211\u6210\u529f\u5730\u5c07\u67e5\u8a62\u6642\u9593\u5f9e10\u79d2\u6e1b\u5c11\u5230\u4e0d\u52301\u79d2\u3002\u9019\u4e0d\u50c5\u63d0\u5347\u4e86\u7528\u6236\u9ad4\u9a57\uff0c\u9084\u63d0\u9ad8\u4e86\u7cfb\u7d71\u7684\u6574\u9ad4\u6027\u80fd\u3002\u9019\u6b21\u7d93\u6b77\u8b93\u6211\u6df1\u523b\u9ad4\u6703\u5230SQL\u512a\u5316\u7684\u91cd\u8981\u6027\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-xtOLuEuWIU\">\u7d50\u8ad6<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u512a\u5316SQL\u67e5\u8a62\u662f\u4e00\u9805\u4e0d\u53ef\u5ffd\u8996\u7684\u5de5\u4f5c\u3002\u901a\u904e\u5408\u7406\u7684\u7d22\u5f15\u3001\u7c21\u5316\u67e5\u8a62\u8a9e\u53e5\u3001\u4f7f\u7528\u5408\u9069\u7684\u6578\u64da\u985e\u578b\u4ee5\u53ca\u5b9a\u671f\u6e05\u7406\u6578\u64da\uff0c\u6211\u5011\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u7dda\u4e0a\u7cfb\u7d71\u4f86\u8aaa\uff0c\u9019\u4e9b\u512a\u5316\u63aa\u65bd\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u63d0\u5347\u60a8\u7684\u7cfb\u7d71\u6027\u80fd\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u4e91\u4f3a\u670d\u5668<\/a>\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u512a\u5316\u6578\u767e\u884cSQL\uff0c\u5c07\u7dda\u4e0a\u7cfb\u7d71\u67e5\u8a62\u6642\u9593\u5f9e10\u79d2\u7e2e\u77ed\uff0c\u63d0\u5347\u6548\u7387\uff0c\u8b93\u6578\u64da\u6aa2\u7d22\u66f4\u5feb\u901f\u6d41\u66a2\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-190986","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/190986","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=190986"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/190986\/revisions"}],"predecessor-version":[{"id":190987,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/190986\/revisions\/190987"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=190986"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=190986"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=190986"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}