{"id":166563,"date":"2024-11-05T17:16:25","date_gmt":"2024-11-05T09:16:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/166563\/"},"modified":"2024-11-05T17:16:26","modified_gmt":"2024-11-05T09:16:26","slug":"%e5%bf%ab%e9%80%9f%e6%90%9c%e7%b4%a2%ef%bc%9a%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b4%a2%e5%bc%95%e6%8a%80%e5%b7%a7-%e5%89%b5%e5%bb%ba%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b4%a2%e5%bc%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/166563\/","title":{"rendered":"\u5feb\u901f\u641c\u7d22\uff1a\u5275\u5efa\u6578\u64da\u5eab\u7d22\u5f15\u6280\u5de7 (\u5275\u5efa\u6578\u64da\u5eab\u7d22\u5f15)"},"content":{"rendered":"<h1 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id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%89%b5%e5%bb%ba%e7%b4%a2%e5%bc%95%e7%9a%84-sql-%e8%aa%9e%e5%8f%a5-cUvmEVVXUu\">\u793a\u4f8b\uff1a\u5275\u5efa\u7d22\u5f15\u7684 SQL \u8a9e\u53e5<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528 SQL \u5275\u5efa\u7d22\u5f15\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>CREATE INDEX index_name ON table_name (column1, column2);<\/code><\/pre>\n<p>\u4f8b\u5982\uff0c\u82e5\u8981\u5728\u540d\u70ba <code>employees<\/code> \u7684\u8868\u4e0a\u70ba <code>last_name<\/code> \u5217\u5275\u5efa\u7d22\u5f15\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>CREATE INDEX idx_lastname ON employees (last_name);<\/code><\/pre>\n<h2 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