{"id":186484,"date":"2024-11-11T06:18:21","date_gmt":"2024-11-10T22:18:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186484\/"},"modified":"2024-11-11T06:18:22","modified_gmt":"2024-11-10T22:18:22","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%9a%e5%b0%8d%e5%a4%9a%ef%bc%8c%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%85%b1%e4%ba%ab%e8%88%87%e9%ab%98%e6%95%88%e7%ae%a1%e7%90%86%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186484\/","title":{"rendered":"\u6578\u64da\u5eab\u591a\u5c0d\u591a\uff0c\u5be6\u73fe\u6578\u64da\u5171\u4eab\u8207\u9ad8\u6548\u7ba1\u7406\uff08\u6578\u64da\u5eab\u591a\u591a\u5c0d\u591a\uff09"},"content":{"rendered":"<h1 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id=\"%e5%a4%9a%e5%b0%8d%e5%a4%9a%e9%97%9c%e4%bf%82%e7%9a%84%e5%af%a6%e7%8f%be-RvUZsctDUo\">\u591a\u5c0d\u591a\u95dc\u4fc2\u7684\u5be6\u73fe<\/h2>\n<p>\u8981\u5728\u6578\u64da\u5eab\u4e2d\u5be6\u73fe\u591a\u5c0d\u591a\u95dc\u4fc2\uff0c\u901a\u5e38\u9700\u8981\u4f7f\u7528\u4e00\u500b\u4e2d\u4ecb\u8868\uff08junction table\uff09\u4f86\u9023\u63a5\u5169\u500b\u5be6\u9ad4\u3002\u9019\u500b\u4e2d\u4ecb\u8868\u5305\u542b\u4e86\u5169\u500b\u5916\u9375\uff0c\u5206\u5225\u6307\u5411\u5169\u500b\u5be6\u9ad4\u7684\u4e3b\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE Students (\n    StudentID INT PRIMARY KEY,\n    StudentName VARCHAR(100)\n);\n\nCREATE TABLE Courses (\n    CourseID INT PRIMARY KEY,\n    CourseName VARCHAR(100)\n);\n\nCREATE TABLE StudentCourses (\n    StudentID INT,\n    CourseID INT,\n    PRIMARY KEY (StudentID, CourseID),\n    FOREIGN KEY (StudentID) REFERENCES Students(StudentID),\n    FOREIGN KEY (CourseID) REFERENCES Courses(CourseID)\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e09\u500b\u8868\uff1aStudents\u3001Courses \u548c StudentCourses\u3002StudentCourses \u8868\u4f5c\u70ba\u4e2d\u4ecb\u8868\uff0c\u5c07\u5b78\u751f\u548c\u8ab2\u7a0b\u4e4b\u9593\u7684\u591a\u5c0d\u591a\u95dc\u4fc2\u9023\u63a5\u8d77\u4f86\u3002<\/p>\n<h2 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