{"id":154691,"date":"2024-11-02T17:55:20","date_gmt":"2024-11-02T09:55:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154691\/"},"modified":"2024-11-02T17:55:22","modified_gmt":"2024-11-02T09:55:22","slug":"%e5%a4%9a%e5%80%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e8%81%af%e5%90%88%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e4%b8%80%e9%ab%94%e5%8c%96%e7%ae%a1%e7%90%86%ef%bc%88%e5%a4%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154691\/","title":{"rendered":"\u591a\u500b\u6578\u64da\u5eab\u806f\u5408\u67e5\u8a62\u8a9e\u53e5\u5be6\u73fe\u6578\u64da\u4e00\u9ad4\u5316\u7ba1\u7406\uff08\u591a\u500b\u6578\u64da\u5eab \u806f\u5408\u67e5\u8a62\u8a9e\u53e5\uff09"},"content":{"rendered":"<h1 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id=\"%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e5%a4%9a%e5%80%8b%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e8%81%af%e5%90%88%e6%9f%a5%e8%a9%a2%ef%bc%9f-RaZlzoqIYE\">\u5982\u4f55\u5be6\u73fe\u591a\u500b\u6578\u64da\u5eab\u7684\u806f\u5408\u67e5\u8a62\uff1f<\/h2>\n<p>\u5be6\u73fe\u591a\u500b\u6578\u64da\u5eab\u7684\u806f\u5408\u67e5\u8a62\u901a\u5e38\u9700\u8981\u4f7f\u7528SQL\u8a9e\u8a00\u4e2d\u7684JOIN\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u806f\u5408\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-1%ef%bc%9a%e4%bd%bf%e7%94%a8inner-join-RaZlzoqIYE\">\u793a\u4f8b 1\uff1a\u4f7f\u7528INNER JOIN<\/h3>\n<pre><code>SELECT a.column1, b.column2\nFROM database1.table1 AS a\nINNER JOIN database2.table2 AS b ON a.common_column = b.common_column;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5f9e\u5169\u500b\u4e0d\u540c\u7684\u6578\u64da\u5eab\u4e2d\u9078\u64c7\u6578\u64da\uff0c\u4e26\u901a\u904e\u5171\u540c\u7684\u5217\u9032\u884c\u806f\u63a5\u3002\u9019\u6a23\u53ef\u4ee5\u7372\u5f97\u4f86\u81ea\u5169\u500b\u6578\u64da\u5eab\u7684\u76f8\u95dc\u6578\u64da\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b-2%ef%bc%9a%e4%bd%bf%e7%94%a8left-join-RaZlzoqIYE\">\u793a\u4f8b 2\uff1a\u4f7f\u7528LEFT JOIN<\/h3>\n<pre><code>SELECT a.column1, b.column2\nFROM database1.table1 AS a\nLEFT JOIN database2.table2 AS b ON a.common_column = b.common_column;<\/code><\/pre>\n<p>\u4f7f\u7528LEFT 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