{"id":173189,"date":"2024-11-07T15:55:18","date_gmt":"2024-11-07T07:55:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/173189\/"},"modified":"2024-11-07T15:55:19","modified_gmt":"2024-11-07T07:55:19","slug":"%e5%a6%82%e4%bd%95%e8%99%95%e7%90%86%e5%85%b7%e6%9c%89%e4%b8%89%e5%80%8b%e9%97%9c%e4%bf%82%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-4-%e5%81%87%e8%a8%ad%e4%b8%80%e5%80%8b%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/173189\/","title":{"rendered":"\u5982\u4f55\u8655\u7406\u5177\u6709\u4e09\u500b\u95dc\u4fc2\u7684\u6578\u64da\u5eab\uff1f (4. \u5047\u8a2d\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u6709\u4e09\u500b\u95dc\u4fc2)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e8%99%95%e7%90%86%e5%85%b7%e6%9c%89%e4%b8%89%e5%80%8b%e9%97%9c%e4%bf%82%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%9f-AHsvqJzRzZ\">\u5982\u4f55\u8655\u7406\u5177\u6709\u4e09\u500b\u95dc\u4fc2\u7684\u6578\u64da\u5eab\uff1f<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u95dc\u4fc2\u662f\u6307\u6578\u64da\u8868\u4e4b\u9593\u7684\u806f\u7e6b\u3002\u7576\u4e00\u500b\u6578\u64da\u5eab\u4e2d\u5b58\u5728\u4e09\u500b\u95dc\u4fc2\u6642\uff0c\u9019\u901a\u5e38\u610f\u5473\u8457\u6211\u5011\u9700\u8981\u8655\u7406\u591a\u500b\u8868\u4e4b\u9593\u7684\u76f8\u4e92\u4f9d\u8cf4\u6027\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u63a2\u8a0e\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u548c\u64cd\u4f5c\u9019\u6a23\u7684\u6578\u64da\u5eab\u7d50\u69cb\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 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id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%ad%b8%e7%94%9f%e3%80%81%e8%aa%b2%e7%a8%8b%e5%92%8c%e9%81%b8%e8%aa%b2-AHsvqJzRzZ\">\u793a\u4f8b\uff1a\u5b78\u751f\u3001\u8ab2\u7a0b\u548c\u9078\u8ab2<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e09\u500b\u8868\uff1a\u5b78\u751f\uff08Students\uff09\u3001\u8ab2\u7a0b\uff08Courses\uff09\u548c\u9078\u8ab2\uff08Enrollments\uff09\u3002\u9019\u4e09\u500b\u8868\u4e4b\u9593\u7684\u95dc\u4fc2\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li>\u6bcf\u500b\u5b78\u751f\u53ef\u4ee5\u9078\u64c7\u591a\u9580\u8ab2\u7a0b\uff08\u5b78\u751f\u8207\u9078\u8ab2\u4e4b\u9593\u662f\u4e00\u5c0d\u591a\u7684\u95dc\u4fc2\uff09\u3002<\/li>\n<li>\u6bcf\u9580\u8ab2\u7a0b\u53ef\u4ee5\u88ab\u591a\u500b\u5b78\u751f\u9078\u64c7\uff08\u8ab2\u7a0b\u8207\u9078\u8ab2\u4e4b\u9593\u4e5f\u662f\u4e00\u5c0d\u591a\u7684\u95dc\u4fc2\uff09\u3002<\/li>\n<li>\u9078\u8ab2\u8868\u5247\u7528\u4f86\u9023\u63a5\u5b78\u751f\u548c\u8ab2\u7a0b\uff0c\u5f62\u6210\u591a\u5c0d\u591a\u7684\u95dc\u4fc2\u3002<\/li>\n<\/ul>\n<h3 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b5%90%e6%a7%8b-AHsvqJzRzZ\">\u6578\u64da\u5eab\u7d50\u69cb<\/h3>\n<p>\u4ee5\u4e0b\u662f\u9019\u4e09\u500b\u8868\u7684\u7c21\u55ae\u7d50\u69cb\uff1a<\/p>\n<pre><code>\nCREATE TABLE Students (\n    student_id INT PRIMARY KEY,\n    name VARCHAR(100)\n);\n\nCREATE TABLE Courses (\n    course_id INT PRIMARY KEY,\n    title VARCHAR(100)\n);\n\nCREATE TABLE Enrollments (\n    enrollment_id INT PRIMARY KEY,\n    student_id INT,\n    course_id INT,\n    FOREIGN KEY (student_id) REFERENCES Students(student_id),\n    FOREIGN KEY (course_id) REFERENCES Courses(course_id)\n);\n<\/code><\/pre>\n<h2 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