{"id":173299,"date":"2024-11-07T16:51:40","date_gmt":"2024-11-07T08:51:40","guid":{"rendered":"https:\/\/server.hk\/cnblog\/173299\/"},"modified":"2024-11-07T16:51:40","modified_gmt":"2024-11-07T08:51:40","slug":"%e5%a6%82%e4%bd%95%e5%ae%9a%e7%be%a9sql%e4%b8%bb%e9%8d%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/173299\/","title":{"rendered":"\u5982\u4f55\u5b9a\u7fa9SQL\u4e3b\u9375"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e5%ae%9a%e7%be%a9sql%e4%b8%bb%e9%8d%b5-ArqpuVCGCF\">\u5982\u4f55\u5b9a\u7fa9SQL\u4e3b\u9375<\/h1>\n<p>\u5728\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u4e2d\uff0c\u4e3b\u9375\uff08Primary 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id=\"%e5%a6%82%e4%bd%95%e5%ae%9a%e7%be%a9%e4%b8%bb%e9%8d%b5-ArqpuVCGCF\">\u5982\u4f55\u5b9a\u7fa9\u4e3b\u9375<\/h2>\n<p>\u5728SQL\u4e2d\uff0c\u53ef\u4ee5\u5728\u5275\u5efa\u8868\u6642\u5b9a\u7fa9\u4e3b\u9375\uff0c\u4e5f\u53ef\u4ee5\u5728\u8868\u5275\u5efa\u5f8c\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u4f86\u6dfb\u52a0\u4e3b\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u793a\u4f8b\uff1a<\/p>\n<h3 id=\"%e5%9c%a8%e5%89%b5%e5%bb%ba%e8%a1%a8%e6%99%82%e5%ae%9a%e7%be%a9%e4%b8%bb%e9%8d%b5-ArqpuVCGCF\">\u5728\u5275\u5efa\u8868\u6642\u5b9a\u7fa9\u4e3b\u9375<\/h3>\n<pre><code>\nCREATE TABLE Users (\n    UserID INT NOT NULL,\n    UserName VARCHAR(100),\n    Email VARCHAR(100),\n    PRIMARY KEY (UserID)\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cUserID\u5217\u88ab\u5b9a\u7fa9\u70ba\u4e3b\u9375\uff0c\u9019\u610f\u5473\u8457\u6bcf\u500b\u7528\u6236\u7684ID\u5fc5\u9808\u662f\u552f\u4e00\u7684\uff0c\u4e26\u4e14\u4e0d\u80fd\u70ba\u7a7a\u3002<\/p>\n<h3 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(OrderID, ProductID)\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cOrderID\u548cProductID\u7684\u7d44\u5408\u88ab\u7528\u4f5c\u4e3b\u9375\uff0c\u9019\u610f\u5473\u8457\u540c\u4e00\u500b\u8a02\u55ae\u4e2d\u53ef\u4ee5\u6709\u591a\u500b\u7522\u54c1\uff0c\u4f46\u6bcf\u500b\u7522\u54c1\u5728\u540c\u4e00\u8a02\u55ae\u4e2d\u5fc5\u9808\u662f\u552f\u4e00\u7684\u3002<\/p>\n<h2 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id=\"%e7%b8%bd%e7%b5%90-ArqpuVCGCF\">\u7e3d\u7d50<\/h2>\n<p>\u4e3b\u9375\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u6b63\u78ba\u5730\u5b9a\u7fa9\u548c\u4f7f\u7528\u4e3b\u9375\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u7121\u8ad6\u662f\u55ae\u4e00\u4e3b\u9375\u9084\u662f\u8907\u5408\u4e3b\u9375\uff0c\u7406\u89e3\u5176\u7279\u6027\u548c\u6700\u4f73\u5be6\u8e10\u90fd\u662f\u6bcf\u4f4d\u6578\u64da\u5eab\u7ba1\u7406\u8005\u5fc5\u9808\u638c\u63e1\u7684\u6280\u80fd\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a 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