{"id":154671,"date":"2024-11-02T17:45:19","date_gmt":"2024-11-02T09:45:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154671\/"},"modified":"2024-11-02T17:45:20","modified_gmt":"2024-11-02T09:45:20","slug":"%e5%a4%9a%e8%a1%a8%e6%87%89%e7%94%a8%e8%88%89%e4%be%8b-%e9%97%9c%e4%bf%82%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%88%e9%97%9c%e4%bf%82%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%9a%e8%a1%a8%e5%af%a6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154671\/","title":{"rendered":"\u591a\u8868\u61c9\u7528\u8209\u4f8b\u2014\u2014\u95dc\u4fc2\u6578\u64da\u5eab\uff08\u95dc\u4fc2\u6578\u64da\u5eab\u591a\u8868\u5be6\u4f8b\uff09"},"content":{"rendered":"<h1 id=\"%e5%a4%9a%e8%a1%a8%e6%87%89%e7%94%a8%e8%88%89%e4%be%8b-%e9%97%9c%e4%bf%82%e6%95%b8%e6%93%9a%e5%ba%ab%ef%bc%88%e9%97%9c%e4%bf%82%e6%95%b8%e6%93%9a%e5%ba%ab%e5%a4%9a%e8%a1%a8%e5%af%a6-mQzRJmGbcl\">\u591a\u8868\u61c9\u7528\u8209\u4f8b\u2014\u2014\u95dc\u4fc2\u6578\u64da\u5eab\uff08\u95dc\u4fc2\u6578\u64da\u5eab\u591a\u8868\u5be6\u4f8b\uff09<\/h1>\n<p>\u5728\u73fe\u4ee3\u7684\u6578\u64da\u7ba1\u7406\u4e2d\uff0c\u95dc\u4fc2\u6578\u64da\u5eab\uff08Relational Database\uff09\u662f\u6700\u5e38\u7528\u7684\u6578\u64da\u5b58\u5132\u89e3\u6c7a\u65b9\u6848\u4e4b\u4e00\u3002\u5b83\u5011\u4ee5\u8868\u683c\u7684\u5f62\u5f0f\u7d44\u7e54\u6578\u64da\uff0c\u4e26\u901a\u904e\u95dc\u806f\u4f86\u5be6\u73fe\u6578\u64da\u7684\u6574\u5408\u548c\u67e5\u8a62\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u591a\u8868\u61c9\u7528\u7684\u5be6\u4f8b\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u95dc\u4fc2\u6578\u64da\u5eab\u7684\u904b\u4f5c\u65b9\u5f0f\u3002<\/p>\n<h2 id=\"%e9%97%9c%e4%bf%82%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-mQzRJmGbcl\">\u95dc\u4fc2\u6578\u64da\u5eab\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u95dc\u4fc2\u6578\u64da\u5eab\u7531\u591a\u500b\u8868\u7d44\u6210\uff0c\u6bcf\u500b\u8868\u90fd\u5305\u542b\u82e5\u5e72\u884c\u548c\u5217\u3002\u884c\u4ee3\u8868\u6578\u64da\u8a18\u9304\uff0c\u5217\u5247\u4ee3\u8868\u6578\u64da\u7684\u5c6c\u6027\u3002\u8868\u4e4b\u9593\u7684\u95dc\u806f\u901a\u5e38\u901a\u904e\u4e3b\u9375\uff08Primary Key\uff09\u548c\u5916\u9375\uff08Foreign Key\uff09\u4f86\u5be6\u73fe\u3002\u4e3b\u9375\u662f\u8868\u4e2d\u552f\u4e00\u6a19\u8b58\u4e00\u689d\u8a18\u9304\u7684\u5b57\u6bb5\uff0c\u800c\u5916\u9375\u5247\u662f\u6307\u5411\u5176\u4ed6\u8868\u7684\u4e3b\u9375\uff0c\u5f9e\u800c\u5efa\u7acb\u8d77\u8868\u4e4b\u9593\u7684\u95dc\u806f\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e8%a1%a8%e6%87%89%e7%94%a8%e7%9a%84%e5%af%a6%e4%be%8b-mQzRJmGbcl\">\u591a\u8868\u61c9\u7528\u7684\u5be6\u4f8b<\/h2>\n<p>\u70ba\u4e86\u66f4\u597d\u5730\u7406\u89e3\u591a\u8868\u61c9\u7528\uff0c\u6211\u5011\u53ef\u4ee5\u8003\u616e\u4e00\u500b\u7c21\u55ae\u7684\u96fb\u5b50\u5546\u52d9\u7cfb\u7d71\u3002\u9019\u500b\u7cfb\u7d71\u53ef\u80fd\u5305\u542b\u4ee5\u4e0b\u5e7e\u500b\u8868\uff1a<\/p>\n<ul>\n<li><strong>\u7528\u6236\u8868\uff08Users\uff09<\/strong><\/li>\n<li><strong>\u7522\u54c1\u8868\uff08Products\uff09<\/strong><\/li>\n<li><strong>\u8a02\u55ae\u8868\uff08Orders\uff09<\/strong><\/li>\n<li><strong>\u8a02\u55ae\u8a73\u60c5\u8868\uff08Order_Details\uff09<\/strong><\/li>\n<\/ul>\n<h3 id=\"1-%e7%94%a8%e6%88%b6%e8%a1%a8%ef%bc%88users%ef%bc%89-mQzRJmGbcl\">1. \u7528\u6236\u8868\uff08Users\uff09<\/h3>\n<pre><code>\nCREATE TABLE Users (\n    UserID INT PRIMARY KEY,\n    UserName VARCHAR(100),\n    Email VARCHAR(100)\n);\n<\/code><\/pre>\n<h3 id=\"2-%e7%94%a2%e5%93%81%e8%a1%a8%ef%bc%88products%ef%bc%89-mQzRJmGbcl\">2. \u7522\u54c1\u8868\uff08Products\uff09<\/h3>\n<pre><code>\nCREATE TABLE Products (\n    ProductID INT PRIMARY KEY,\n    ProductName VARCHAR(100),\n    Price DECIMAL(10, 2)\n);\n<\/code><\/pre>\n<h3 id=\"3-%e8%a8%82%e5%96%ae%e8%a1%a8%ef%bc%88orders%ef%bc%89-mQzRJmGbcl\">3. \u8a02\u55ae\u8868\uff08Orders\uff09<\/h3>\n<pre><code>\nCREATE TABLE Orders (\n    OrderID INT PRIMARY KEY,\n    UserID INT,\n    OrderDate DATETIME,\n    FOREIGN KEY (UserID) REFERENCES Users(UserID)\n);\n<\/code><\/pre>\n<h3 id=\"4-%e8%a8%82%e5%96%ae%e8%a9%b3%e6%83%85%e8%a1%a8%ef%bc%88order_details%ef%bc%89-mQzRJmGbcl\">4. \u8a02\u55ae\u8a73\u60c5\u8868\uff08Order_Details\uff09<\/h3>\n<pre><code>\nCREATE TABLE Order_Details (\n    OrderDetailID INT PRIMARY KEY,\n    OrderID INT,\n    ProductID INT,\n    Quantity INT,\n    FOREIGN KEY (OrderID) REFERENCES Orders(OrderID),\n    FOREIGN KEY (ProductID) REFERENCES Products(ProductID)\n);\n<\/code><\/pre>\n<h2 id=\"%e6%95%b8%e6%93%9a%e6%9f%a5%e8%a9%a2%e7%a4%ba%e4%be%8b-mQzRJmGbcl\">\u6578\u64da\u67e5\u8a62\u793a\u4f8b<\/h2>\n<p>\u5728\u9019\u500b\u96fb\u5b50\u5546\u52d9\u7cfb\u7d71\u4e2d\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u8981\u67e5\u8a62\u67d0\u4f4d\u7528\u6236\u7684\u6240\u6709\u8a02\u55ae\u53ca\u5176\u8a73\u7d30\u4fe1\u606f\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u67e5\u8a62\uff1a<\/p>\n<pre><code>\nSELECT \n    Users.UserName, \n    Orders.OrderID, \n    Orders.OrderDate, \n    Products.ProductName, \n    Order_Details.Quantity\nFROM \n    Users\nJOIN \n    Orders ON Users.UserID = Orders.UserID\nJOIN \n    Order_Details ON Orders.OrderID = Order_Details.OrderID\nJOIN \n    Products ON Order_Details.ProductID = Products.ProductID\nWHERE \n    Users.UserName = 'JohnDoe';\n<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u901a\u904e\u591a\u8868\u806f\u63a5\uff08JOIN\uff09\u4f86\u7372\u53d6\u7528\u6236\u7684\u8a02\u55ae\u4fe1\u606f\uff0c\u5c55\u793a\u4e86\u5982\u4f55\u5728\u95dc\u4fc2\u6578\u64da\u5eab\u4e2d\u6709\u6548\u5730\u6574\u5408\u4f86\u81ea\u4e0d\u540c\u8868\u7684\u6578\u64da\u3002<\/p>\n<h2 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href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u7684\u8cc7\u8a0a\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u95dc\u4fc2\u6578\u64da\u5eab\u4e2d\u7684\u591a\u8868\u61c9\u7528\u5be6\u4f8b\uff0c\u4e86\u89e3\u5982\u4f55\u6709\u6548\u7ba1\u7406\u548c\u67e5\u8a62\u6578\u64da\u4ee5\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-154671","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154671","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=154671"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154671\/revisions"}],"predecessor-version":[{"id":154672,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154671\/revisions\/154672"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154671"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154671"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}