{"id":66367,"date":"2024-10-14T16:54:17","date_gmt":"2024-10-14T08:54:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66367\/"},"modified":"2024-10-14T16:54:17","modified_gmt":"2024-10-14T08:54:17","slug":"mssql%e4%b8%ad%e8%a8%ad%e7%bd%ae%e9%bb%98%e8%aa%8d%e5%80%bc%e7%9a%84%e5%87%bd%e6%95%b8%e7%a0%94%e7%a9%b6%ef%bc%88mssql%e9%bb%98%e8%aa%8d%e5%80%bc%e5%87%bd%e6%95%b8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/66367\/","title":{"rendered":"MSSQL\u4e2d\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u7684\u51fd\u6578\u7814\u7a76\uff08mssql\u9ed8\u8a8d\u503c\u51fd\u6578\uff09"},"content":{"rendered":"<h1 id=\"mssql%e4%b8%ad%e8%a8%ad%e7%bd%ae%e9%bb%98%e8%aa%8d%e5%80%bc%e7%9a%84%e5%87%bd%e6%95%b8%e7%a0%94%e7%a9%b6%ef%bc%88mssql%e9%bb%98%e8%aa%8d%e5%80%bc%e5%87%bd%e6%95%b8%ef%bc%89-zNvTgLycAW\">MSSQL\u4e2d\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u7684\u51fd\u6578\u7814\u7a76\uff08mssql\u9ed8\u8a8d\u503c\u51fd\u6578\uff09<\/h1>\n<p>\u5728Microsoft SQL Server\uff08MSSQL\uff09\u4e2d\uff0c\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u662f\u4e00\u500b\u91cd\u8981\u7684\u529f\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u5728\u63d2\u5165\u6578\u64da\u6642\u81ea\u52d5\u586b\u5145\u67d0\u4e9b\u5b57\u6bb5\u3002\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9084\u7c21\u5316\u4e86\u6578\u64da\u63d2\u5165\u7684\u904e\u7a0b\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMSSQL\u4e2d\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u7684\u51fd\u6578\u53ca\u5176\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e9%bb%98%e8%aa%8d%e5%80%bc%e7%9a%84%e6%a6%82%e5%bf%b5-zNvTgLycAW\">\u9ed8\u8a8d\u503c\u7684\u6982\u5ff5<\/h2>\n<p>\u9ed8\u8a8d\u503c\u662f\u6307\u5728\u63d2\u5165\u65b0\u8a18\u9304\u6642\uff0c\u5982\u679c\u67d0\u500b\u5b57\u6bb5\u672a\u88ab\u660e\u78ba\u6307\u5b9a\u503c\uff0c\u5247\u81ea\u52d5\u4f7f\u7528\u7684\u503c\u3002\u9019\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u975e\u5e38\u6709\u7528\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u4fdd\u6301\u6578\u64da\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<h2 id=\"mssql%e4%b8%ad%e8%a8%ad%e7%bd%ae%e9%bb%98%e8%aa%8d%e5%80%bc%e7%9a%84%e6%96%b9%e6%b3%95-zNvTgLycAW\">MSSQL\u4e2d\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u7684\u65b9\u6cd5<\/h2>\n<p>\u5728MSSQL\u4e2d\uff0c\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u5e7e\u7a2e\u65b9\u5f0f\u8a2d\u7f6e\u9ed8\u8a8d\u503c\uff1a<\/p>\n<ul>\n<li><strong>\u5728\u5275\u5efa\u8868\u6642\u8a2d\u7f6e\u9ed8\u8a8d\u503c<\/strong><\/li>\n<li><strong>\u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u4fee\u6539\u73fe\u6709\u8868\u7684\u9ed8\u8a8d\u503c<\/strong><\/li>\n<li><strong>\u4f7f\u7528DEFAULT\u7d04\u675f<\/strong><\/li>\n<\/ul>\n<h3 id=\"1-%e5%9c%a8%e5%89%b5%e5%bb%ba%e8%a1%a8%e6%99%82%e8%a8%ad%e7%bd%ae%e9%bb%98%e8%aa%8d%e5%80%bc-zNvTgLycAW\">1. \u5728\u5275\u5efa\u8868\u6642\u8a2d\u7f6e\u9ed8\u8a8d\u503c<\/h3>\n<pre><code>\nCREATE TABLE Employees (\n    ID INT PRIMARY KEY,\n    Name NVARCHAR(100),\n    HireDate DATETIME DEFAULT GETDATE()\n);\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u7576\u63d2\u5165\u65b0\u54e1\u5de5\u6642\uff0c\u5982\u679c\u672a\u63d0\u4f9bHireDate\uff0c\u5247\u81ea\u52d5\u4f7f\u7528\u7576\u524d\u65e5\u671f\u548c\u6642\u9593\u4f5c\u70ba\u9ed8\u8a8d\u503c\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8alter-table%e8%aa%9e%e5%8f%a5%e4%bf%ae%e6%94%b9%e7%8f%be%e6%9c%89%e8%a1%a8%e7%9a%84%e9%bb%98%e8%aa%8d%e5%80%bc-zNvTgLycAW\">2. \u4f7f\u7528ALTER TABLE\u8a9e\u53e5\u4fee\u6539\u73fe\u6709\u8868\u7684\u9ed8\u8a8d\u503c<\/h3>\n<pre><code>\nALTER TABLE Employees\nADD CONSTRAINT DF_HireDate DEFAULT GETDATE() FOR HireDate;\n<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u70ba\u5df2\u5b58\u5728\u7684Employees\u8868\u4e2d\u7684HireDate\u5b57\u6bb5\u6dfb\u52a0\u4e86\u4e00\u500b\u9ed8\u8a8d\u503c\u7d04\u675f\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8default%e7%b4%84%e6%9d%9f-zNvTgLycAW\">3. \u4f7f\u7528DEFAULT\u7d04\u675f<\/h3>\n<p>DEFAULT\u7d04\u675f\u53ef\u4ee5\u5728\u5275\u5efa\u6216\u4fee\u6539\u8868\u6642\u4f7f\u7528\uff0c\u9019\u6a23\u53ef\u4ee5\u78ba\u4fdd\u5728\u63d2\u5165\u6578\u64da\u6642\u81ea\u52d5\u586b\u5145\u9ed8\u8a8d\u503c\u3002<\/p>\n<pre><code>\nCREATE TABLE Products (\n    ProductID INT PRIMARY KEY,\n    ProductName NVARCHAR(100),\n    Price DECIMAL(10, 2) DEFAULT 0.00\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cPrice\u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u8a2d\u7f6e\u70ba0.00\uff0c\u9019\u610f\u5473\u8457\u5982\u679c\u672a\u63d0\u4f9b\u50f9\u683c\uff0c\u5247\u81ea\u52d5\u4f7f\u75280.00\u3002<\/p>\n<h2 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id=\"%e7%b5%90%e8%ab%96-zNvTgLycAW\">\u7d50\u8ad6<\/h2>\n<p>\u5728MSSQL\u4e2d\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u662f\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u63d2\u5165\u6548\u7387\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u9ed8\u8a8d\u503c\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u5eab\u7684\u7a69\u5b9a\u6027\u548c\u53ef\u7dad\u8b77\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9019\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u529f\u80fd\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\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> 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