{"id":186144,"date":"2024-11-11T03:28:22","date_gmt":"2024-11-10T19:28:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186144\/"},"modified":"2024-11-11T03:28:23","modified_gmt":"2024-11-10T19:28:23","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%88%86%e6%9e%90%e6%96%b9%e6%b3%95%e7%b0%a1%e6%9e%90%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e8%a1%a8%e5%88%86%e6%9e%90%e6%96%b9%e6%b3%95%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186144\/","title":{"rendered":"\u6578\u64da\u5eab\u8868\u5206\u6790\u65b9\u6cd5\u7c21\u6790\uff08\u6578\u64da\u5eab\u8868\u5206\u6790\u65b9\u6cd5\uff09"},"content":{"rendered":"<h1 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id=\"2-%e6%95%b8%e6%93%9a%e8%b3%aa%e9%87%8f%e5%88%86%e6%9e%90-fbaqtnJKhQ\">2. 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id=\"3-%e6%95%b8%e6%93%9a%e9%97%9c%e8%81%af%e5%88%86%e6%9e%90-fbaqtnJKhQ\">3. \u6578\u64da\u95dc\u806f\u5206\u6790<\/h2>\n<p>\u6578\u64da\u95dc\u806f\u5206\u6790\u65e8\u5728\u767c\u73fe\u4e0d\u540c\u6578\u64da\u8868\u4e4b\u9593\u7684\u95dc\u806f\u6027\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528 SQL \u67e5\u8a62\u4f86\u9032\u884c\u806f\u63a5\u64cd\u4f5c\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u95dc\u806f\u5206\u6790\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li><strong>\u5167\u806f\u63a5\uff08INNER JOIN\uff09\uff1a<\/strong>\u50c5\u8fd4\u56de\u5169\u500b\u8868\u4e2d\u5339\u914d\u7684\u8a18\u9304\u3002<\/li>\n<li><strong>\u5916\u806f\u63a5\uff08OUTER JOIN\uff09\uff1a<\/strong>\u8fd4\u56de\u4e00\u500b\u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\uff0c\u5373\u4f7f\u5728\u53e6\u4e00\u500b\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u8a18\u9304\u3002<\/li>\n<li><strong>\u4ea4\u53c9\u806f\u63a5\uff08CROSS JOIN\uff09\uff1a<\/strong>\u8fd4\u56de\u5169\u500b\u8868\u7684\u7b1b\u5361\u723e\u7a4d\uff0c\u901a\u5e38\u7528\u65bc\u751f\u6210\u6240\u6709\u53ef\u80fd\u7684\u7d44\u5408\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e5%85%a7%e8%81%af%e6%8e%a5%e6%9f%a5%e8%a9%a2-fbaqtnJKhQ\">\u7bc4\u4f8b\uff1a\u5167\u806f\u63a5\u67e5\u8a62<\/h3>\n<pre><code>\nSELECT users.username, orders.order_id\nFROM users\nINNER JOIN orders ON users.user_id = orders.user_id;\n<\/code><\/pre>\n<h2 id=\"4-%e6%95%b8%e6%93%9a%e8%b6%a8%e5%8b%a2%e5%88%86%e6%9e%90-fbaqtnJKhQ\">4. 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id=\"%e7%b8%bd%e7%b5%90-fbaqtnJKhQ\">\u7e3d\u7d50<\/h2>\n<p>\u6578\u64da\u5eab\u8868\u5206\u6790\u65b9\u6cd5\u662f\u6578\u64da\u7ba1\u7406\u548c\u5229\u7528\u7684\u91cd\u8981\u7d44\u6210\u90e8\u5206\u3002\u901a\u904e\u7d50\u69cb\u5206\u6790\u3001\u6578\u64da\u8cea\u91cf\u5206\u6790\u3001\u95dc\u806f\u5206\u6790\u3001\u8da8\u52e2\u5206\u6790\u548c\u53ef\u8996\u5316\u5206\u6790\u7b49\u65b9\u6cd5\uff0c\u4f01\u696d\u80fd\u5920\u66f4\u6709\u6548\u5730\u5229\u7528\u6578\u64da\uff0c\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u548c\u5b58\u5132\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u985e\u578b\u7684 <a 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