{"id":174431,"date":"2024-11-07T21:48:22","date_gmt":"2024-11-07T13:48:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/174431\/"},"modified":"2024-11-07T21:48:23","modified_gmt":"2024-11-07T13:48:23","slug":"%e5%a6%82%e4%bd%95%e9%80%b2%e8%a1%8c%e8%a1%a8%e8%88%87%e8%a1%a8%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8f%88%e6%8e%a5-%e8%a1%a8%e8%88%87%e8%a1%a8%e5%a6%82%e4%bd%95%e9%8f%88%e6%8e%a5%e6%95%b8%e6%93%9a","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/174431\/","title":{"rendered":"\u5982\u4f55\u9032\u884c\u8868\u8207\u8868\u7684\u6578\u64da\u5eab\u93c8\u63a5 (\u8868\u8207\u8868\u5982\u4f55\u93c8\u63a5\u6578\u64da\u5eab)"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e9%80%b2%e8%a1%8c%e8%a1%a8%e8%88%87%e8%a1%a8%e7%9a%84%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8f%88%e6%8e%a5-%e8%a1%a8%e8%88%87%e8%a1%a8%e5%a6%82%e4%bd%95%e9%8f%88%e6%8e%a5%e6%95%b8%e6%93%9a-qAGBFwcpJg\">\u5982\u4f55\u9032\u884c\u8868\u8207\u8868\u7684\u6578\u64da\u5eab\u93c8\u63a5 (\u8868\u8207\u8868\u5982\u4f55\u93c8\u63a5\u6578\u64da\u5eab)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u8868\u8207\u8868\u4e4b\u9593\u7684\u93c8\u63a5\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u56e0\u70ba\u5b83\u5011\u80fd\u5920\u5e6b\u52a9\u6211\u5011\u6709\u6548\u5730\u7d44\u7e54\u548c\u7ba1\u7406\u6578\u64da\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5728\u95dc\u806f\u6578\u64da\u5eab\u4e2d\u9032\u884c\u8868\u8207\u8868\u7684\u93c8\u63a5\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e9%8f%88%e6%8e%a5%ef%bc%9f-qAGBFwcpJg\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u93c8\u63a5\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u93c8\u63a5\u662f\u6307\u5728\u4e0d\u540c\u7684\u6578\u64da\u8868\u4e4b\u9593\u5efa\u7acb\u95dc\u806f\uff0c\u4ee5\u4fbf\u80fd\u5920\u5f9e\u591a\u500b\u8868\u4e2d\u6aa2\u7d22\u548c\u64cd\u4f5c\u6578\u64da\u3002\u9019\u7a2e\u95dc\u806f\u901a\u5e38\u662f\u901a\u904e\u5916\u9375\uff08Foreign Key\uff09\u4f86\u5be6\u73fe\u7684\u3002\u5916\u9375\u662f\u4e00\u500b\u8868\u4e2d\u7684\u5b57\u6bb5\uff0c\u5b83\u5f15\u7528\u53e6\u4e00\u500b\u8868\u7684\u4e3b\u9375\uff08Primary Key\uff09\uff0c\u5f9e\u800c\u5efa\u7acb\u5169\u500b\u8868\u4e4b\u9593\u7684\u95dc\u806f\u3002<\/p>\n<h2 id=\"%e8%a1%a8%e8%88%87%e8%a1%a8%e4%b9%8b%e9%96%93%e7%9a%84%e9%97%9c%e8%81%af%e9%a1%9e%e5%9e%8b-qAGBFwcpJg\">\u8868\u8207\u8868\u4e4b\u9593\u7684\u95dc\u806f\u985e\u578b<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u8868\u8207\u8868\u4e4b\u9593\u7684\u95dc\u806f\u4e3b\u8981\u6709\u4e09\u7a2e\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u4e00\u5c0d\u4e00\uff08One-to-One\uff09<\/strong>\uff1a\u6bcf\u500b\u8868\u4e2d\u7684\u4e00\u689d\u8a18\u9304\u53ea\u80fd\u8207\u53e6\u4e00\u500b\u8868\u4e2d\u7684\u4e00\u689d\u8a18\u9304\u76f8\u95dc\u806f\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u8005\u548c\u5176\u8a73\u7d30\u8cc7\u6599\u4e4b\u9593\u7684\u95dc\u4fc2\u3002<\/li>\n<li><strong>\u4e00\u5c0d\u591a\uff08One-to-Many\uff09<\/strong>\uff1a\u4e00\u500b\u8868\u4e2d\u7684\u4e00\u689d\u8a18\u9304\u53ef\u4ee5\u8207\u53e6\u4e00\u500b\u8868\u4e2d\u7684\u591a\u689d\u8a18\u9304\u76f8\u95dc\u806f\u3002\u4f8b\u5982\uff0c\u4e00\u500b\u5ba2\u6236\u53ef\u4ee5\u6709\u591a\u500b\u8a02\u55ae\u3002<\/li>\n<li><strong>\u591a\u5c0d\u591a\uff08Many-to-Many\uff09<\/strong>\uff1a\u4e00\u500b\u8868\u4e2d\u7684\u591a\u689d\u8a18\u9304\u53ef\u4ee5\u8207\u53e6\u4e00\u500b\u8868\u4e2d\u7684\u591a\u689d\u8a18\u9304\u76f8\u95dc\u806f\u3002\u9019\u901a\u5e38\u9700\u8981\u4e00\u500b\u4e2d\u4ecb\u8868\u4f86\u5be6\u73fe\uff0c\u4f8b\u5982\u5b78\u751f\u548c\u8ab2\u7a0b\u4e4b\u9593\u7684\u95dc\u4fc2\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%af%a6%e7%8f%be%e8%a1%a8%e8%88%87%e8%a1%a8%e7%9a%84%e9%8f%88%e6%8e%a5-qAGBFwcpJg\">\u5982\u4f55\u5be6\u73fe\u8868\u8207\u8868\u7684\u93c8\u63a5<\/h2>\n<h3 id=\"1-%e4%b8%80%e5%b0%8d%e4%b8%80%e9%97%9c%e8%81%af-qAGBFwcpJg\">1. \u4e00\u5c0d\u4e00\u95dc\u806f<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<code>users<\/code>\u548c<code>user_profiles<\/code>\u3002\u6bcf\u500b\u4f7f\u7528\u8005\u90fd\u6709\u4e00\u500b\u5c0d\u61c9\u7684\u500b\u4eba\u8cc7\u6599\u3002\u53ef\u4ee5\u9019\u6a23\u8a2d\u8a08\uff1a<\/p>\n<pre><code>CREATE TABLE users (\n    id INT PRIMARY KEY,\n    username VARCHAR(50) NOT NULL\n);\n\nCREATE TABLE user_profiles (\n    user_id INT,\n    bio TEXT,\n    FOREIGN KEY (user_id) REFERENCES users(id)\n);\n<\/code><\/pre>\n<h3 id=\"2-%e4%b8%80%e5%b0%8d%e5%a4%9a%e9%97%9c%e8%81%af-qAGBFwcpJg\">2. \u4e00\u5c0d\u591a\u95dc\u806f<\/h3>\n<p>\u5728\u4e00\u5c0d\u591a\u7684\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528<code>customers<\/code>\u548c<code>orders<\/code>\u8868\u4f5c\u70ba\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE customers (\n    id INT PRIMARY KEY,\n    name VARCHAR(100) NOT NULL\n);\n\nCREATE TABLE orders (\n    id INT PRIMARY KEY,\n    customer_id INT,\n    order_date DATE,\n    FOREIGN KEY (customer_id) REFERENCES customers(id)\n);\n<\/code><\/pre>\n<h3 id=\"3-%e5%a4%9a%e5%b0%8d%e5%a4%9a%e9%97%9c%e8%81%af-qAGBFwcpJg\">3. \u591a\u5c0d\u591a\u95dc\u806f<\/h3>\n<p>\u5c0d\u65bc\u591a\u5c0d\u591a\u7684\u95dc\u806f\uff0c\u6211\u5011\u9700\u8981\u4e00\u500b\u4e2d\u4ecb\u8868\uff0c\u4f8b\u5982<code>students<\/code>\u548c<code>courses<\/code>\uff1a<\/p>\n<pre><code>CREATE TABLE students (\n    id INT PRIMARY KEY,\n    name VARCHAR(100) NOT NULL\n);\n\nCREATE TABLE courses (\n    id INT PRIMARY KEY,\n    title VARCHAR(100) NOT NULL\n);\n\nCREATE TABLE student_courses (\n    student_id INT,\n    course_id INT,\n    FOREIGN KEY (student_id) REFERENCES students(id),\n    FOREIGN KEY (course_id) REFERENCES courses(id)\n);\n<\/code><\/pre>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e9%8f%88%e6%8e%a5%e7%9a%84%e6%95%b8%e6%93%9a-qAGBFwcpJg\">\u67e5\u8a62\u93c8\u63a5\u7684\u6578\u64da<\/h2>\n<p>\u4e00\u65e6\u5efa\u7acb\u4e86\u8868\u4e4b\u9593\u7684\u95dc\u806f\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 SQL \u67e5\u8a62\u4f86\u6aa2\u7d22\u93c8\u63a5\u7684\u6578\u64da\u3002\u4f8b\u5982\uff0c\u82e5\u8981\u67e5\u8a62\u6240\u6709\u5ba2\u6236\u53ca\u5176\u8a02\u55ae\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT customers.name, orders.order_date\nFROM customers\nJOIN orders ON customers.id = orders.customer_id;\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-qAGBFwcpJg\">\u7e3d\u7d50<\/h2>\n<p>\u8868\u8207\u8868\u4e4b\u9593\u7684\u6578\u64da\u5eab\u93c8\u63a5\u662f\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u6982\u5ff5\uff0c\u80fd\u5920\u5e6b\u52a9\u6211\u5011\u6709\u6548\u5730\u7d44\u7e54\u548c\u6aa2\u7d22\u6578\u64da\u3002\u901a\u904e\u4f7f\u7528\u5916\u9375\uff0c\u6211\u5011\u53ef\u4ee5\u5efa\u7acb\u4e00\u5c0d\u4e00\u3001\u4e00\u5c0d\u591a\u548c\u591a\u5c0d\u591a\u7684\u95dc\u806f\uff0c\u4e26\u5229\u7528 SQL \u67e5\u8a62\u4f86\u6aa2\u7d22\u76f8\u95dc\u6578\u64da\u3002\u4e86\u89e3\u9019\u4e9b\u57fa\u672c\u6982\u5ff5\u5f8c\uff0c\u60a8\u53ef\u4ee5\u66f4\u597d\u5730\u8a2d\u8a08\u548c\u7ba1\u7406\u60a8\u7684\u6578\u64da\u5eab\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u9700\u6c42\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u696d\u52d9\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> 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