{"id":140424,"date":"2024-10-31T20:36:19","date_gmt":"2024-10-31T12:36:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/140424\/"},"modified":"2024-10-31T20:36:20","modified_gmt":"2024-10-31T12:36:20","slug":"sql-server%e5%a4%96%e9%8d%b5%e5%8a%9f%e8%83%bd%ef%bc%9a%e7%a2%ba%e4%bf%9d%e6%95%b8%e6%93%9a%e5%ae%8c%e6%95%b4%e6%80%a7%ef%bc%88sqlserver-fk%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/140424\/","title":{"rendered":"SQL Server\u5916\u9375\u529f\u80fd\uff1a\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\uff08sqlserver fk\uff09"},"content":{"rendered":"<h1 id=\"sql-server%e5%a4%96%e9%8d%b5%e5%8a%9f%e8%83%bd%ef%bc%9a%e7%a2%ba%e4%bf%9d%e6%95%b8%e6%93%9a%e5%ae%8c%e6%95%b4%e6%80%a7-peLgQzZlBg\">SQL Server\u5916\u9375\u529f\u80fd\uff1a\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u6578\u64da\u5b8c\u6574\u6027\u662f\u78ba\u4fdd\u6578\u64da\u6e96\u78ba\u6027\u548c\u4e00\u81f4\u6027\u7684\u91cd\u8981\u6982\u5ff5\u3002SQL Server\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u4e86\u591a\u7a2e\u5de5\u5177\u4f86\u7dad\u8b77\u6578\u64da\u5b8c\u6574\u6027\uff0c\u5176\u4e2d\u5916\u9375\uff08Foreign Key\uff09\u529f\u80fd\u662f\u6700\u70ba\u95dc\u9375\u7684\u4e4b\u4e00\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eSQL Server\u4e2d\u7684\u5916\u9375\u529f\u80fd\u53ca\u5176\u5982\u4f55\u5e6b\u52a9\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%a4%96%e9%8d%b5%ef%bc%9f-peLgQzZlBg\">\u4ec0\u9ebc\u662f\u5916\u9375\uff1f<\/h2>\n<p>\u5916\u9375\u662f\u4e00\u7a2e\u7d04\u675f\uff0c\u7528\u65bc\u5728\u5169\u500b\u8868\u4e4b\u9593\u5efa\u7acb\u95dc\u806f\u3002\u5b83\u662f\u4e00\u500b\u8868\u4e2d\u7684\u5b57\u6bb5\uff0c\u8a72\u5b57\u6bb5\u5f15\u7528\u53e6\u4e00\u500b\u8868\u7684\u4e3b\u9375\u3002\u901a\u904e\u9019\u7a2e\u65b9\u5f0f\uff0c\u5916\u9375\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u53c3\u8003\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u51fa\u73fe\u5b64\u7acb\u7684\u6578\u64da\u884c\u3002<\/p>\n<h3 id=\"%e5%a4%96%e9%8d%b5%e7%9a%84%e4%bd%9c%e7%94%a8-peLgQzZlBg\">\u5916\u9375\u7684\u4f5c\u7528<\/h3>\n<ul>\n<li><strong>\u7dad\u8b77\u6578\u64da\u4e00\u81f4\u6027\uff1a<\/strong>\u5916\u9375\u7d04\u675f\u78ba\u4fdd\u4e86\u5728\u4e00\u500b\u8868\u4e2d\u5f15\u7528\u7684\u6578\u64da\u5728\u53e6\u4e00\u500b\u8868\u4e2d\u5fc5\u9808\u5b58\u5728\uff0c\u9019\u6a23\u53ef\u4ee5\u9632\u6b62\u7121\u6548\u6578\u64da\u7684\u63d2\u5165\u3002<\/li>\n<li><strong>\u81ea\u52d5\u66f4\u65b0\u548c\u522a\u9664\uff1a<\/strong>\u7576\u4e3b\u8868\u4e2d\u7684\u6578\u64da\u88ab\u66f4\u65b0\u6216\u522a\u9664\u6642\uff0c\u5916\u9375\u53ef\u4ee5\u8a2d\u7f6e\u70ba\u81ea\u52d5\u66f4\u65b0\u6216\u522a\u9664\u76f8\u95dc\u7684\u5f9e\u8868\u6578\u64da\uff0c\u9019\u6a23\u53ef\u4ee5\u4fdd\u6301\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<li><strong>\u6578\u64da\u95dc\u806f\u6027\uff1a<\/strong>\u5916\u9375\u5e6b\u52a9\u5efa\u7acb\u8868\u4e4b\u9593\u7684\u95dc\u806f\uff0c\u4f7f\u5f97\u6578\u64da\u5eab\u7684\u7d50\u69cb\u66f4\u52a0\u6e05\u6670\uff0c\u4fbf\u65bc\u67e5\u8a62\u548c\u7ba1\u7406\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e5%9c%a8sql-server%e4%b8%ad%e5%89%b5%e5%bb%ba%e5%a4%96%e9%8d%b5-peLgQzZlBg\">\u5982\u4f55\u5728SQL Server\u4e2d\u5275\u5efa\u5916\u9375<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u5275\u5efa\u5916\u9375\u7684\u8a9e\u6cd5\u76f8\u5c0d\u7c21\u55ae\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5728\u5169\u500b\u8868\u4e4b\u9593\u5efa\u7acb\u5916\u9375\u95dc\u4fc2\u3002<\/p>\n<pre><code>CREATE TABLE Customers (\n    CustomerID int PRIMARY KEY,\n    CustomerName varchar(255) NOT NULL\n);\n\nCREATE TABLE Orders (\n    OrderID int PRIMARY KEY,\n    OrderDate datetime NOT NULL,\n    CustomerID int,\n    FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u5169\u500b\u8868\uff1aCustomers\u548cOrders\u3002Orders\u8868\u4e2d\u7684CustomerID\u5b57\u6bb5\u4f5c\u70ba\u5916\u9375\uff0c\u5f15\u7528\u4e86Customers\u8868\u4e2d\u7684CustomerID\u4e3b\u9375\u3002\u9019\u6a23\uff0c\u53ea\u6709\u5728Customers\u8868\u4e2d\u5b58\u5728\u7684CustomerID\u624d\u80fd\u88ab\u63d2\u5165\u5230Orders\u8868\u4e2d\u3002<\/p>\n<h2 id=\"%e5%a4%96%e9%8d%b5%e7%9a%84%e7%b4%84%e6%9d%9f%e9%81%b8%e9%a0%85-peLgQzZlBg\">\u5916\u9375\u7684\u7d04\u675f\u9078\u9805<\/h2>\n<p>\u5728\u5275\u5efa\u5916\u9375\u6642\uff0cSQL Server\u63d0\u4f9b\u4e86\u5e7e\u500b\u7d04\u675f\u9078\u9805\uff0c\u4ee5\u4fbf\u66f4\u597d\u5730\u63a7\u5236\u6578\u64da\u7684\u5b8c\u6574\u6027\uff1a<\/p>\n<ul>\n<li><strong>ON DELETE CASCADE\uff1a<\/strong>\u7576\u4e3b\u8868\u4e2d\u7684\u4e00\u884c\u88ab\u522a\u9664\u6642\uff0c\u6240\u6709\u5f15\u7528\u8a72\u884c\u7684\u5f9e\u8868\u884c\u4e5f\u6703\u81ea\u52d5\u88ab\u522a\u9664\u3002<\/li>\n<li><strong>ON UPDATE CASCADE\uff1a<\/strong>\u7576\u4e3b\u8868\u4e2d\u7684\u4e3b\u9375\u503c\u88ab\u66f4\u65b0\u6642\uff0c\u6240\u6709\u5f15\u7528\u8a72\u503c\u7684\u5f9e\u8868\u884c\u4e5f\u6703\u81ea\u52d5\u66f4\u65b0\u3002<\/li>\n<li><strong>SET NULL\uff1a<\/strong>\u7576\u4e3b\u8868\u4e2d\u7684\u4e00\u884c\u88ab\u522a\u9664\u6216\u66f4\u65b0\u6642\uff0c\u6240\u6709\u5f15\u7528\u8a72\u884c\u7684\u5f9e\u8868\u884c\u7684\u5916\u9375\u503c\u5c07\u88ab\u8a2d\u7f6e\u70baNULL\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e4%bd%bf%e7%94%a8%e7%b4%84%e6%9d%9f%e9%81%b8%e9%a0%85-peLgQzZlBg\">\u793a\u4f8b\uff1a\u4f7f\u7528\u7d04\u675f\u9078\u9805<\/h3>\n<pre><code>CREATE TABLE Orders (\n    OrderID int PRIMARY KEY,\n    OrderDate datetime NOT NULL,\n    CustomerID int,\n    FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID)\n    ON DELETE CASCADE\n    ON UPDATE CASCADE\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u7576Customers\u8868\u4e2d\u7684\u67d0\u500bCustomerID\u88ab\u522a\u9664\u6216\u66f4\u65b0\u6642\uff0cOrders\u8868\u4e2d\u6240\u6709\u76f8\u95dc\u7684\u884c\u4e5f\u6703\u81ea\u52d5\u9032\u884c\u76f8\u61c9\u7684\u522a\u9664\u6216\u66f4\u65b0\uff0c\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u5730\u7dad\u8b77\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-peLgQzZlBg\">\u7d50\u8ad6<\/h2>\n<p>\u5916\u9375\u529f\u80fd\u5728SQL Server\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u5916\u9375\u7d04\u675f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u9632\u6b62\u6578\u64da\u932f\u8aa4\u548c\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u767c\u751f\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u5eab\u7684\u53ef\u9760\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3SQL Server\u5916\u9375\u529f\u80fd\u5982\u4f55\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\uff0c\u7dad\u8b77\u6578\u64da\u95dc\u806f\u6027\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7684\u53ef\u9760\u6027\u8207\u4e00\u81f4\u6027\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-140424","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/140424","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=140424"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/140424\/revisions"}],"predecessor-version":[{"id":140425,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/140424\/revisions\/140425"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=140424"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=140424"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=140424"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}