{"id":187342,"date":"2024-11-11T13:28:21","date_gmt":"2024-11-11T05:28:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187342\/"},"modified":"2024-11-11T13:28:22","modified_gmt":"2024-11-11T05:28:22","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%ae%8c%e6%95%b4%e6%80%a7%ef%bc%9a%e4%bf%9d%e8%ad%89%e6%95%b8%e6%93%9a%e6%ad%a3%e7%a2%ba%e7%84%a1%e8%aa%a4-%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%ae%8c%e6%95%b4%e6%80%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187342\/","title":{"rendered":"\u6578\u64da\u5eab\u5b8c\u6574\u6027\uff1a\u4fdd\u8b49\u6578\u64da\u6b63\u78ba\u7121\u8aa4 (\u6578\u64da\u5eab\u7684\u5b8c\u6574\u6027\u5305\u62ec)"},"content":{"rendered":"<h1 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id=\"%e5%af%a6%e9%ab%94%e5%ae%8c%e6%95%b4%e6%80%a7-SNRJsYRgxs\">\u5be6\u9ad4\u5b8c\u6574\u6027<\/h2>\n<p>\u5be6\u9ad4\u5b8c\u6574\u6027\u662f\u6578\u64da\u5eab\u5b8c\u6574\u6027\u7684\u57fa\u790e\u3002\u6bcf\u500b\u8868\u683c\u4e2d\u7684\u6bcf\u4e00\u884c\u90fd\u5fc5\u9808\u662f\u552f\u4e00\u7684\uff0c\u9019\u901a\u5e38\u662f\u901a\u904e\u4e3b\u9375\u4f86\u5be6\u73fe\u7684\u3002\u4e3b\u9375\u662f\u4e00\u500b\u6216\u591a\u500b\u5217\u7684\u7d44\u5408\uff0c\u80fd\u5920\u552f\u4e00\u6a19\u8b58\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u7528\u6236\u8868\u4e2d\uff0c\u4f7f\u7528\u7528\u6236ID\u4f5c\u70ba\u4e3b\u9375\u53ef\u4ee5\u78ba\u4fdd\u6bcf\u500b\u7528\u6236\u7684\u552f\u4e00\u6027\u3002<\/p>\n<pre><code>CREATE TABLE Users (\n    UserID INT PRIMARY KEY,\n    UserName VARCHAR(100),\n    Email VARCHAR(100)\n);<\/code><\/pre>\n<h2 id=\"%e5%8f%83%e7%85%a7%e5%ae%8c%e6%95%b4%e6%80%a7-SNRJsYRgxs\">\u53c3\u7167\u5b8c\u6574\u6027<\/h2>\n<p>\u53c3\u7167\u5b8c\u6574\u6027\u78ba\u4fdd\u6578\u64da\u4e4b\u9593\u7684\u95dc\u806f\u662f\u6b63\u78ba\u7684\u3002\u9019\u901a\u5e38\u662f\u901a\u904e\u5916\u9375\u4f86\u7dad\u8b77\u7684\u3002\u5916\u9375\u662f\u4e00\u500b\u8868\u4e2d\u7684\u5217\uff0c\u5b83\u5f15\u7528\u53e6\u4e00\u500b\u8868\u4e2d\u7684\u4e3b\u9375\u3002\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u4e00\u500b\u8868\u4e2d\u5b58\u5728\u7684\u6578\u64da\u5728\u53e6\u4e00\u500b\u8868\u4e2d\u4e5f\u5fc5\u9808\u5b58\u5728\u3002\u4f8b\u5982\uff0c\u5728\u8a02\u55ae\u8868\u4e2d\uff0c\u5ba2\u6236ID\u53ef\u4ee5\u4f5c\u70ba\u5916\u9375\u5f15\u7528\u7528\u6236\u8868\u4e2d\u7684\u7528\u6236ID\u3002<\/p>\n<pre><code>CREATE TABLE Orders (\n    OrderID INT PRIMARY KEY,\n    UserID INT,\n    OrderDate DATE,\n    FOREIGN KEY (UserID) REFERENCES Users(UserID)\n);<\/code><\/pre>\n<h2 id=\"%e5%9f%9f%e5%ae%8c%e6%95%b4%e6%80%a7-SNRJsYRgxs\">\u57df\u5b8c\u6574\u6027<\/h2>\n<p>\u57df\u5b8c\u6574\u6027\u78ba\u4fdd\u6578\u64da\u7684\u503c\u5728\u7279\u5b9a\u7bc4\u570d\u5167\u3002\u9019\u901a\u5e38\u662f\u901a\u904e\u6578\u64da\u985e\u578b\u548c\u7d04\u675f\u4f86\u5be6\u73fe\u7684\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u8a2d\u7f6e\u4e00\u500b\u7d04\u675f\uff0c\u8981\u6c42\u5e74\u9f61\u5b57\u6bb5\u7684\u503c\u5fc5\u9808\u57280\u5230120\u4e4b\u9593\u3002<\/p>\n<pre><code>CREATE TABLE Employees (\n    EmployeeID INT PRIMARY KEY,\n    Name VARCHAR(100),\n    Age INT CHECK (Age &gt;= 0 AND Age &lt;= 120)\n);<\/code><\/pre>\n<h2 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