{"id":187476,"date":"2024-11-11T14:35:21","date_gmt":"2024-11-11T06:35:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187476\/"},"modified":"2024-11-11T14:35:22","modified_gmt":"2024-11-11T06:35:22","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96%ef%bc%9a%e4%b8%80%e7%af%87%e4%bd%a0%e9%9c%80%e8%a6%81%e4%ba%86%e8%a7%a3%e7%9a%84%e7%b4%a2%e5%bc%95%e6%b7%bb%e5%8a%a0%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187476\/","title":{"rendered":"\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\uff1a\u4e00\u7bc7\u4f60\u9700\u8981\u4e86\u89e3\u7684\u7d22\u5f15\u6dfb\u52a0\u65b9\u6cd5 (\u5982\u4f55\u6dfb\u52a0\u6578\u64da\u5eab\u7d22\u5f15)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%a7%e8%83%bd%e5%84%aa%e5%8c%96%ef%bc%9a%e4%b8%80%e7%af%87%e4%bd%a0%e9%9c%80%e8%a6%81%e4%ba%86%e8%a7%a3%e7%9a%84%e7%b4%a2%e5%bc%95%e6%b7%bb%e5%8a%a0%e6%96%b9%e6%b3%95-XzPdNooVxY\">\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\uff1a\u4e00\u7bc7\u4f60\u9700\u8981\u4e86\u89e3\u7684\u7d22\u5f15\u6dfb\u52a0\u65b9\u6cd5<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u6027\u80fd\u5c0d\u65bc\u61c9\u7528\u7a0b\u5e8f\u7684\u6574\u9ad4\u6548\u7387\u81f3\u95dc\u91cd\u8981\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u5982\u4f55\u6709\u6548\u5730\u6aa2\u7d22\u548c\u7ba1\u7406\u9019\u4e9b\u6578\u64da\u6210\u70ba\u4e86\u6bcf\u500b\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u9700\u8981\u9762\u5c0d\u7684\u6311\u6230\u3002\u7d22\u5f15\u4f5c\u70ba\u4e00\u7a2e\u91cd\u8981\u7684\u6578\u64da\u5eab\u512a\u5316\u6280\u8853\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u6dfb\u52a0\u6578\u64da\u5eab\u7d22\u5f15\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\u548c\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b4%a2%e5%bc%95%ef%bc%9f-XzPdNooVxY\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u7d22\u5f15\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u7d22\u5f15\u662f\u4e00\u7a2e\u6578\u64da\u7d50\u69cb\uff0c\u65e8\u5728\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u901f\u5ea6\u3002\u5b83\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u5e6b\u52a9\u6578\u64da\u5eab\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u7684\u6578\u64da\u3002\u7d22\u5f15\u53ef\u4ee5\u57fa\u65bc\u4e00\u500b\u6216\u591a\u500b\u5217\u5275\u5efa\uff0c\u4e26\u4e14\u53ef\u4ee5\u986f\u8457\u6e1b\u5c11\u67e5\u8a62\u7684\u57f7\u884c\u6642\u9593\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e7%b4%a2%e5%bc%95%ef%bc%9f-XzPdNooVxY\">\u70ba\u4ec0\u9ebc\u9700\u8981\u7d22\u5f15\uff1f<\/h2>\n<ul>\n<li><strong>\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff1a<\/strong>\u7d22\u5f15\u53ef\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/li>\n<li><strong>\u6e1b\u5c11I\/O\u64cd\u4f5c\uff1a<\/strong>\u901a\u904e\u6e1b\u5c11\u9700\u8981\u6383\u63cf\u7684\u6578\u64da\u91cf\uff0c\u7d22\u5f15\u53ef\u4ee5\u964d\u4f4e\u78c1\u789fI\/O\u64cd\u4f5c\u7684\u983b\u7387\u3002<\/li>\n<li><strong>\u652f\u6301\u552f\u4e00\u6027\u7d04\u675f\uff1a<\/strong>\u7d22\u5f15\u53ef\u4ee5\u7528\u65bc\u5f37\u5236\u552f\u4e00\u6027\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e6%b7%bb%e5%8a%a0%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b4%a2%e5%bc%95-XzPdNooVxY\">\u5982\u4f55\u6dfb\u52a0\u6578\u64da\u5eab\u7d22\u5f15<\/h2>\n<p>\u6dfb\u52a0\u7d22\u5f15\u7684\u5177\u9ad4\u65b9\u6cd5\u53d6\u6c7a\u65bc\u6240\u4f7f\u7528\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff08DBMS\uff09\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u6578\u64da\u5eab\u7cfb\u7d71\u4e2d\u6dfb\u52a0\u7d22\u5f15\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<h3 id=\"1-mysql-XzPdNooVxY\">1. MySQL<\/h3>\n<pre><code>CREATE INDEX index_name ON table_name (column1, column2);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u6211\u5011\u5e0c\u671b\u5728 <code>last_name<\/code> \u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE INDEX idx_lastname ON employees (last_name);<\/code><\/pre>\n<h3 id=\"2-postgresql-XzPdNooVxY\">2. PostgreSQL<\/h3>\n<pre><code>CREATE INDEX index_name ON table_name (column1, column2);<\/code><\/pre>\n<p>\u5728PostgreSQL\u4e2d\uff0c\u5275\u5efa\u7d22\u5f15\u7684\u8a9e\u6cd5\u8207MySQL\u76f8\u4f3c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE INDEX idx_lastname ON employees (last_name);<\/code><\/pre>\n<h3 id=\"3-sql-server-XzPdNooVxY\">3. SQL Server<\/h3>\n<pre><code>CREATE INDEX index_name ON table_name (column1, column2);<\/code><\/pre>\n<p>\u5728SQL Server\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\u5275\u5efa\u7d22\u5f15\uff1a<\/p>\n<pre><code>CREATE INDEX idx_lastname ON employees (last_name);<\/code><\/pre>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-XzPdNooVxY\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<ul>\n<li><strong>\u9078\u64c7\u5408\u9069\u7684\u5217\uff1a<\/strong>\u5728\u7d93\u5e38\u7528\u65bc\u67e5\u8a62\u7684\u5217\u4e0a\u5275\u5efa\u7d22\u5f15\uff0c\u7279\u5225\u662f\u90a3\u4e9b\u7528\u65bcJOIN\u3001WHERE\u548cORDER BY\u5b50\u53e5\u7684\u5217\u3002<\/li>\n<li><strong>\u907f\u514d\u904e\u591a\u7d22\u5f15\uff1a<\/strong>\u96d6\u7136\u7d22\u5f15\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u4f46\u904e\u591a\u7684\u7d22\u5f15\u6703\u5f71\u97ff\u6578\u64da\u63d2\u5165\u3001\u66f4\u65b0\u548c\u522a\u9664\u7684\u6027\u80fd\u3002<\/li>\n<li><strong>\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\uff1a<\/strong>\u96a8\u8457\u6578\u64da\u7684\u8b8a\u5316\uff0c\u7d22\u5f15\u53ef\u80fd\u6703\u8b8a\u5f97\u4e0d\u5920\u6709\u6548\u3002\u5b9a\u671f\u91cd\u5efa\u7d22\u5f15\u53ef\u4ee5\u4fdd\u6301\u5176\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-XzPdNooVxY\">\u7d50\u8ad6<\/h2>\n<p>\u6578\u64da\u5eab\u7d22\u5f15\u662f\u63d0\u5347\u67e5\u8a62\u6027\u80fd\u7684\u91cd\u8981\u5de5\u5177\u3002\u901a\u904e\u6b63\u78ba\u5730\u6dfb\u52a0\u548c\u7ba1\u7406\u7d22\u5f15\uff0c\u60a8\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u6578\u64da\u6aa2\u7d22\u7684\u6548\u7387\u3002\u7136\u800c\uff0c\u904e\u591a\u6216\u4e0d\u7576\u7684\u7d22\u5f15\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u56e0\u6b64\u5728\u6dfb\u52a0\u7d22\u5f15\u6642\u9700\u8981\u8b39\u614e\u8003\u616e\u3002\u4e86\u89e3\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528\u7d22\u5f15\uff0c\u5c07\u6709\u52a9\u65bc\u60a8\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\u53d6\u5f97\u66f4\u597d\u7684\u6210\u679c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u60a8\u512a\u5316\u6027\u80fd\u4e26\u63d0\u5347\u696d\u52d9\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u6578\u64da\u5eab\u6027\u80fd\u512a\u5316\u7684\u95dc\u9375\uff0c\u638c\u63e1\u6709\u6548\u7684\u7d22\u5f15\u6dfb\u52a0\u65b9\u6cd5\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u78ba\u4fdd\u6578\u64da\u5eab\u904b\u884c\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-187476","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187476","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=187476"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187476\/revisions"}],"predecessor-version":[{"id":187477,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187476\/revisions\/187477"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187476"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187476"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187476"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}