{"id":138997,"date":"2024-10-31T17:21:23","date_gmt":"2024-10-31T09:21:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/138997\/"},"modified":"2024-10-31T17:21:23","modified_gmt":"2024-10-31T09:21:23","slug":"sql-server%e7%bc%ba%e7%9c%81%e7%b4%84%e6%9d%9f%e3%80%81%e5%88%97%e7%b4%84%e6%9d%9f%e5%92%8c%e8%a1%a8%e7%b4%84%e6%9d%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/138997\/","title":{"rendered":"SQL Server\u7f3a\u7701\u7d04\u675f\u3001\u5217\u7d04\u675f\u548c\u8868\u7d04\u675f"},"content":{"rendered":"<h1 id=\"sql-server%e7%bc%ba%e7%9c%81%e7%b4%84%e6%9d%9f%e3%80%81%e5%88%97%e7%b4%84%e6%9d%9f%e5%92%8c%e8%a1%a8%e7%b4%84%e6%9d%9f-hzDGvRQaAC\">SQL Server\u7f3a\u7701\u7d04\u675f\u3001\u5217\u7d04\u675f\u548c\u8868\u7d04\u675f<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u7d04\u675f\u662f\u7528\u4f86\u9650\u5236\u8cc7\u6599\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u7684\u91cd\u8981\u5de5\u5177\u3002SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2e\u7d04\u675f\u985e\u578b\uff0c\u5176\u4e2d\u5305\u62ec\u7f3a\u7701\u7d04\u675f\u3001\u5217\u7d04\u675f\u548c\u8868\u7d04\u675f\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u4e9b\u7d04\u675f\u7684\u5b9a\u7fa9\u3001\u7528\u9014\u53ca\u5176\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e7%bc%ba%e7%9c%81%e7%b4%84%e6%9d%9f%ef%bc%88default-constraint%ef%bc%89-hzDGvRQaAC\">\u7f3a\u7701\u7d04\u675f\uff08DEFAULT Constraint\uff09<\/h2>\n<p>\u7f3a\u7701\u7d04\u675f\u662f\u4e00\u7a2e\u5217\u7d04\u675f\uff0c\u7528\u65bc\u70ba\u67d0\u4e00\u5217\u6307\u5b9a\u4e00\u500b\u9810\u8a2d\u503c\uff0c\u7576\u63d2\u5165\u8cc7\u6599\u6642\u5982\u679c\u672a\u63d0\u4f9b\u8a72\u5217\u7684\u503c\uff0c\u5247\u81ea\u52d5\u4f7f\u7528\u9810\u8a2d\u503c\u3002\u9019\u5c0d\u65bc\u78ba\u4fdd\u8cc7\u6599\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-hzDGvRQaAC\">\u4f7f\u7528\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE TABLE Employees (\n    EmployeeID INT PRIMARY KEY,\n    FirstName NVARCHAR(50),\n    LastName NVARCHAR(50),\n    HireDate DATETIME DEFAULT GETDATE()\n);\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u7bc4\u4f8b\u4e2d\uff0c\u7576\u63d2\u5165\u65b0\u54e1\u5de5\u8cc7\u6599\u6642\uff0c\u5982\u679c\u672a\u63d0\u4f9b <code>HireDate<\/code> \u7684\u503c\uff0c\u5247\u6703\u81ea\u52d5\u4f7f\u7528\u7576\u524d\u65e5\u671f\u4f5c\u70ba\u9810\u8a2d\u503c\u3002<\/p>\n<h2 id=\"%e5%88%97%e7%b4%84%e6%9d%9f%ef%bc%88column-constraints%ef%bc%89-hzDGvRQaAC\">\u5217\u7d04\u675f\uff08Column Constraints\uff09<\/h2>\n<p>\u5217\u7d04\u675f\u662f\u91dd\u5c0d\u55ae\u4e00\u5217\u7684\u7d04\u675f\uff0c\u4e3b\u8981\u7528\u65bc\u9650\u5236\u8a72\u5217\u4e2d\u53ef\u4ee5\u5b58\u5132\u7684\u8cc7\u6599\u985e\u578b\u548c\u7bc4\u570d\u3002\u5e38\u898b\u7684\u5217\u7d04\u675f\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>NOT NULL<\/strong>\uff1a\u78ba\u4fdd\u8a72\u5217\u4e0d\u80fd\u70ba\u7a7a\u3002<\/li>\n<li><strong>UNIQUE<\/strong>\uff1a\u78ba\u4fdd\u8a72\u5217\u4e2d\u7684\u6240\u6709\u503c\u90fd\u662f\u552f\u4e00\u7684\u3002<\/li>\n<li><strong>CHECK<\/strong>\uff1a\u78ba\u4fdd\u8a72\u5217\u4e2d\u7684\u503c\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u3002<\/li>\n<\/ul>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-hzDGvRQaAC\">\u4f7f\u7528\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE TABLE Products (\n    ProductID INT PRIMARY KEY,\n    ProductName NVARCHAR(100) NOT NULL,\n    Price DECIMAL(10, 2) CHECK (Price &gt; 0),\n    SKU NVARCHAR(50) UNIQUE\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c<code>ProductName<\/code> \u5217\u4e0d\u80fd\u70ba\u7a7a\uff0c<code>Price<\/code> \u5217\u5fc5\u9808\u5927\u65bc\u96f6\uff0c\u800c <code>SKU<\/code> \u5217\u4e2d\u7684\u503c\u5fc5\u9808\u662f\u552f\u4e00\u7684\u3002<\/p>\n<h2 id=\"%e8%a1%a8%e7%b4%84%e6%9d%9f%ef%bc%88table-constraints%ef%bc%89-hzDGvRQaAC\">\u8868\u7d04\u675f\uff08Table Constraints\uff09<\/h2>\n<p>\u8868\u7d04\u675f\u662f\u91dd\u5c0d\u6574\u500b\u8868\u7684\u7d04\u675f\uff0c\u901a\u5e38\u7528\u65bc\u5b9a\u7fa9\u591a\u5217\u4e4b\u9593\u7684\u95dc\u4fc2\u3002\u8868\u7d04\u675f\u7684\u5e38\u898b\u985e\u578b\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>PRIMARY KEY<\/strong>\uff1a\u552f\u4e00\u6a19\u8b58\u8868\u4e2d\u7684\u6bcf\u4e00\u884c\u3002<\/li>\n<li><strong>FOREIGN KEY<\/strong>\uff1a\u78ba\u4fdd\u8868\u4e4b\u9593\u7684\u53c3\u7167\u5b8c\u6574\u6027\u3002<\/li>\n<li><strong>CHECK<\/strong>\uff1a\u53ef\u4ee5\u5728\u8868\u7d1a\u5225\u4e0a\u5b9a\u7fa9\uff0c\u78ba\u4fdd\u6574\u500b\u8868\u4e2d\u7684\u8cc7\u6599\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u3002<\/li>\n<\/ul>\n<h3 id=\"%e4%bd%bf%e7%94%a8%e7%af%84%e4%be%8b-hzDGvRQaAC\">\u4f7f\u7528\u7bc4\u4f8b<\/h3>\n<pre><code>CREATE TABLE Orders (\n    OrderID INT PRIMARY KEY,\n    OrderDate DATETIME DEFAULT GETDATE(),\n    CustomerID INT,\n    FOREIGN KEY (CustomerID) REFERENCES Customers(CustomerID)\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c<code>OrderID<\/code> \u662f\u4e3b\u9375\uff0c\u4e26\u4e14 <code>CustomerID<\/code> \u662f\u5916\u9375\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u6bcf\u500b\u8a02\u55ae\u90fd\u8207\u4e00\u500b\u6709\u6548\u7684\u5ba2\u6236\u76f8\u95dc\u806f\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-hzDGvRQaAC\">\u7d50\u8ad6<\/h2>\n<p>SQL Server\u4e2d\u7684\u7f3a\u7701\u7d04\u675f\u3001\u5217\u7d04\u675f\u548c\u8868\u7d04\u675f\u662f\u78ba\u4fdd\u8cc7\u6599\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u7684\u95dc\u9375\u5de5\u5177\u3002\u900f\u904e\u5408\u7406\u5730\u4f7f\u7528\u9019\u4e9b\u7d04\u675f\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u8cc7\u6599\u5eab\u4e2d\u7684\u8cc7\u6599\uff0c\u907f\u514d\u4e0d\u4e00\u81f4\u548c\u932f\u8aa4\u7684\u767c\u751f\u3002\u4e86\u89e3\u9019\u4e9b\u7d04\u675f\u7684\u7279\u6027\u548c\u4f7f\u7528\u65b9\u6cd5\uff0c\u5c0d\u65bc\u8cc7\u6599\u5eab\u8a2d\u8a08\u548c\u7ba1\u7406\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u8cc7\u6599\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u9700\u6c42\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\uff0c\u7279\u5225\u662f\u6211\u5011\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3SQL Server\u4e2d\u7684\u7f3a\u7701\u7d04\u675f\u3001\u5217\u7d04\u675f\u548c\u8868\u7d04\u675f\uff0c\u638c\u63e1\u6578\u64da\u5b8c\u6574\u6027\u548c\u7d04\u675f\u7ba1\u7406\u7684\u95dc\u9375\u6982\u5ff5\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-138997","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138997","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=138997"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138997\/revisions"}],"predecessor-version":[{"id":138998,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138997\/revisions\/138998"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=138997"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=138997"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=138997"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}