{"id":154667,"date":"2024-11-02T17:43:21","date_gmt":"2024-11-02T09:43:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154667\/"},"modified":"2024-11-02T17:43:22","modified_gmt":"2024-11-02T09:43:22","slug":"%e5%a4%9a%e8%a1%a8%e5%90%88%e4%b8%80%ef%bc%8c%e6%b0%b4%e6%99%b6%e5%a0%b1%e8%a1%a8%e8%bc%95%e9%ac%86%e6%90%9e%e5%ae%9a%ef%bc%81%ef%bc%88%e6%b0%b4%e6%99%b6%e5%a0%b1%e8%a1%a8%e5%a4%9a%e5%80%8b%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154667\/","title":{"rendered":"\u591a\u8868\u5408\u4e00\uff0c\u6c34\u6676\u5831\u8868\u8f15\u9b06\u641e\u5b9a\uff01\uff08\u6c34\u6676\u5831\u8868\u591a\u500b\u6578\u64da\u5eab\u8868\uff09"},"content":{"rendered":"<h1 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id=\"%e6%ad%a5%e9%a9%9f%e4%b8%89%ef%bc%9a%e8%a8%ad%e7%bd%ae%e9%97%9c%e8%81%af-sIawrydAFD\">\u6b65\u9a5f\u4e09\uff1a\u8a2d\u7f6e\u95dc\u806f<\/h3>\n<p>\u5728\u9078\u64c7\u4e86\u591a\u500b\u8868\u4e4b\u5f8c\uff0c\u7528\u6236\u9700\u8981\u8a2d\u7f6e\u8868\u4e4b\u9593\u7684\u95dc\u806f\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u6b65\u9a5f\u5b8c\u6210\uff1a<\/p>\n<ol>\n<li>\u5728\u201c\u95dc\u806f\u201d\u8996\u5716\u4e2d\uff0c\u62d6\u52d5\u4e00\u500b\u8868\u7684\u5b57\u6bb5\u5230\u53e6\u4e00\u500b\u8868\u7684\u76f8\u61c9\u5b57\u6bb5\u4e0a\u3002<\/li>\n<li>\u8a2d\u7f6e\u95dc\u806f\u985e\u578b\uff08\u5982\u5167\u90e8\u9023\u63a5\u3001\u5916\u90e8\u9023\u63a5\u7b49\uff09\u3002<\/li>\n<\/ol>\n<h3 id=\"%e6%ad%a5%e9%a9%9f%e5%9b%9b%ef%bc%9a%e8%a8%ad%e8%a8%88%e5%a0%b1%e8%a1%a8-sIawrydAFD\">\u6b65\u9a5f\u56db\uff1a\u8a2d\u8a08\u5831\u8868<\/h3>\n<p>\u5b8c\u6210\u6578\u64da\u8868\u7684\u9078\u64c7\u548c\u95dc\u806f\u8a2d\u7f6e\u5f8c\uff0c\u7528\u6236\u53ef\u4ee5\u958b\u59cb\u8a2d\u8a08\u5831\u8868\u3002\u9019\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u62d6\u653e\u6240\u9700\u7684\u5b57\u6bb5\u5230\u5831\u8868\u8a2d\u8a08\u5340\u57df\u3002<\/li>\n<li>\u8a2d\u7f6e\u5b57\u6bb5\u7684\u683c\u5f0f\u548c\u6a23\u5f0f\u3002<\/li>\n<li>\u6dfb\u52a0\u8a08\u7b97\u5b57\u6bb5\u548c\u5716\u8868\u4ee5\u589e\u5f37\u5831\u8868\u7684\u53ef\u8b80\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e6%95%b4%e5%90%88%e8%a8%82%e5%96%ae%e5%92%8c%e5%ae%a2%e6%88%b6%e6%95%b8%e6%93%9a-sIawrydAFD\">\u7bc4\u4f8b\uff1a\u6574\u5408\u8a02\u55ae\u548c\u5ba2\u6236\u6578\u64da<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a\u8a02\u55ae\u8868\uff08Orders\uff09\u548c\u5ba2\u6236\u8868\uff08Customers\uff09\u3002\u6211\u5011\u5e0c\u671b\u751f\u6210\u4e00\u500b\u5831\u8868\uff0c\u986f\u793a\u6bcf\u4f4d\u5ba2\u6236\u7684\u8a02\u55ae\u6578\u91cf\u548c\u7e3d\u91d1\u984d\u3002\u4ee5\u4e0b\u662f\u7c21\u55ae\u7684SQL\u67e5\u8a62\u7bc4\u4f8b\uff1a<\/p>\n<pre><code>\nSELECT Customers.CustomerName, COUNT(Orders.OrderID) AS OrderCount, SUM(Orders.TotalAmount) AS TotalAmount\nFROM Customers\nLEFT JOIN Orders ON Customers.CustomerID = Orders.CustomerID\nGROUP BY Customers.CustomerName;\n<\/code><\/pre>\n<p>\u901a\u904e\u4e0a\u8ff0\u67e5\u8a62\uff0c\u6211\u5011\u53ef\u4ee5\u7372\u5f97\u6bcf\u4f4d\u5ba2\u6236\u7684\u8a02\u55ae\u6578\u91cf\u548c\u7e3d\u91d1\u984d\uff0c\u4e26\u5c07\u5176\u6574\u5408\u5230\u6c34\u6676\u5831\u8868\u4e2d\u3002<\/p>\n<h2 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