{"id":143703,"date":"2024-11-01T00:23:20","date_gmt":"2024-10-31T16:23:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143703\/"},"modified":"2024-11-01T00:23:21","modified_gmt":"2024-10-31T16:23:21","slug":"sql-server-%e5%bb%ba%e8%a1%a8%e6%99%82%e8%a8%ad%e7%bd%ae%e5%ad%97%e6%ae%b5%e5%88%9d%e5%a7%8b%e9%bb%98%e8%aa%8d%e5%80%bc%e7%9a%84%e7%a4%ba%e4%be%8b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143703\/","title":{"rendered":"SQL Server \u5efa\u8868\u6642\u8a2d\u7f6e\u5b57\u6bb5\u521d\u59cb\u9ed8\u8a8d\u503c\u7684\u793a\u4f8b"},"content":{"rendered":"<h1 id=\"sql-server-%e5%bb%ba%e8%a1%a8%e6%99%82%e8%a8%ad%e7%bd%ae%e5%ad%97%e6%ae%b5%e5%88%9d%e5%a7%8b%e9%bb%98%e8%aa%8d%e5%80%bc%e7%9a%84%e7%a4%ba%e4%be%8b-gakixLPwqv\">SQL Server \u5efa\u8868\u6642\u8a2d\u7f6e\u5b57\u6bb5\u521d\u59cb\u9ed8\u8a8d\u503c\u7684\u793a\u4f8b<\/h1>\n<p>\u5728\u4f7f\u7528 SQL Server \u9032\u884c\u6578\u64da\u5eab\u8a2d\u8a08\u6642\uff0c\u8a2d\u7f6e\u5b57\u6bb5\u7684\u521d\u59cb\u9ed8\u8a8d\u503c\u662f\u4e00\u500b\u91cd\u8981\u7684\u6b65\u9a5f\u3002\u9019\u4e0d\u50c5\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9084\u80fd\u7c21\u5316\u6578\u64da\u7684\u63d2\u5165\u904e\u7a0b\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 SQL Server \u4e2d\u8a2d\u7f6e\u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e9%bb%98%e8%aa%8d%e5%80%bc%ef%bc%9f-gakixLPwqv\">\u4ec0\u9ebc\u662f\u9ed8\u8a8d\u503c\uff1f<\/h2>\n<p>\u9ed8\u8a8d\u503c\u662f\u6307\u5728\u63d2\u5165\u65b0\u8a18\u9304\u6642\uff0c\u5982\u679c\u672a\u63d0\u4f9b\u67d0\u500b\u5b57\u6bb5\u7684\u503c\uff0c\u5247\u81ea\u52d5\u4f7f\u7528\u7684\u503c\u3002\u9019\u5c0d\u65bc\u67d0\u4e9b\u5b57\u6bb5\u4f86\u8aaa\u662f\u975e\u5e38\u6709\u7528\u7684\uff0c\u4f8b\u5982\u65e5\u671f\u3001\u72c0\u614b\u6216\u8a08\u7b97\u503c\u7b49\u3002\u901a\u904e\u8a2d\u7f6e\u9ed8\u8a8d\u503c\uff0c\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u4e26\u6e1b\u5c11\u56e0\u70ba\u7f3a\u5931\u503c\u800c\u5c0e\u81f4\u7684\u932f\u8aa4\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e8%a8%ad%e7%bd%ae%e9%bb%98%e8%aa%8d%e5%80%bc-gakixLPwqv\">\u5982\u4f55\u8a2d\u7f6e\u9ed8\u8a8d\u503c<\/h2>\n<p>\u5728 SQL Server \u4e2d\uff0c\u53ef\u4ee5\u5728\u5275\u5efa\u8868\u6642\u6216\u4fee\u6539\u73fe\u6709\u8868\u6642\u8a2d\u7f6e\u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u3002\u4ee5\u4e0b\u662f\u5169\u7a2e\u5e38\u898b\u7684\u65b9\u6cd5\uff1a<\/p>\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-gakixLPwqv\">1. \u5728\u5275\u5efa\u8868\u6642\u8a2d\u7f6e\u9ed8\u8a8d\u503c<\/h3>\n<p>\u7576\u5275\u5efa\u65b0\u8868\u6642\uff0c\u53ef\u4ee5\u5728\u5b57\u6bb5\u5b9a\u7fa9\u4e2d\u4f7f\u7528 <code>DEFAULT<\/code> \u95dc\u9375\u5b57\u4f86\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE Employees (\n    EmployeeID INT PRIMARY KEY,\n    FirstName NVARCHAR(50) NOT NULL,\n    LastName NVARCHAR(50) NOT NULL,\n    HireDate DATETIME DEFAULT GETDATE(),\n    Status NVARCHAR(10) DEFAULT 'Active'\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c<code>HireDate<\/code> \u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u8a2d\u7f6e\u70ba\u7576\u524d\u65e5\u671f\u548c\u6642\u9593\uff0c\u800c <code>Status<\/code> \u5b57\u6bb5\u7684\u9ed8\u8a8d\u503c\u8a2d\u7f6e\u70ba &#8216;Active&#8217;\u3002<\/p>\n<h3 id=\"2-%e4%bf%ae%e6%94%b9%e7%8f%be%e6%9c%89%e8%a1%a8%e4%bb%a5%e6%b7%bb%e5%8a%a0%e9%bb%98%e8%aa%8d%e5%80%bc-gakixLPwqv\">2. \u4fee\u6539\u73fe\u6709\u8868\u4ee5\u6dfb\u52a0\u9ed8\u8a8d\u503c<\/h3>\n<p>\u5982\u679c\u9700\u8981\u5728\u5df2\u5b58\u5728\u7684\u8868\u4e2d\u6dfb\u52a0\u9ed8\u8a8d\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>ALTER TABLE<\/code> \u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>ALTER TABLE Employees\nADD CONSTRAINT DF_Employees_Status DEFAULT 'Active' FOR Status;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u70ba <code>Status<\/code> \u5b57\u6bb5\u6dfb\u52a0\u4e86\u4e00\u500b\u540d\u70ba <code>DF_Employees_Status<\/code> \u7684\u9ed8\u8a8d\u7d04\u675f\uff0c\u5c07\u5176\u9ed8\u8a8d\u503c\u8a2d\u7f6e\u70ba &#8216;Active&#8217;\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e5%b8%b6%e6%9c%89%e9%bb%98%e8%aa%8d%e5%80%bc%e7%9a%84%e5%ad%97%e6%ae%b5-gakixLPwqv\">\u67e5\u8a62\u5e36\u6709\u9ed8\u8a8d\u503c\u7684\u5b57\u6bb5<\/h2>\n<p>\u8a2d\u7f6e\u4e86\u9ed8\u8a8d\u503c\u5f8c\uff0c\u53ef\u4ee5\u901a\u904e\u63d2\u5165\u6578\u64da\u4f86\u9a57\u8b49\u5176\u6548\u679c\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>INSERT INTO Employees (EmployeeID, FirstName, LastName)\nVALUES (1, 'John', 'Doe');<\/code><\/pre>\n<p>\u5728\u9019\u500b\u63d2\u5165\u64cd\u4f5c\u4e2d\uff0c<code>HireDate<\/code> \u548c <code>Status<\/code> \u5b57\u6bb5\u5c07\u81ea\u52d5\u4f7f\u7528\u5176\u9ed8\u8a8d\u503c\u3002\u53ef\u4ee5\u901a\u904e\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u63d2\u5165\u7684\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM Employees;<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-gakixLPwqv\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u6642\uff0c\u6709\u5e7e\u9ede\u9700\u8981\u6ce8\u610f\uff1a<\/p>\n<ul>\n<li>\u9ed8\u8a8d\u503c\u5fc5\u9808\u8207\u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\u76f8\u7b26\u3002<\/li>\n<li>\u5982\u679c\u5b57\u6bb5\u8a2d\u7f6e\u70ba <code>NOT NULL<\/code>\uff0c\u5247\u5fc5\u9808\u63d0\u4f9b\u9ed8\u8a8d\u503c\u3002<\/li>\n<li>\u5728\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u5f8c\uff0c\u5c0d\u65bc\u5df2\u5b58\u5728\u7684\u6578\u64da\u884c\uff0c\u9ed8\u8a8d\u503c\u4e0d\u6703\u81ea\u52d5\u61c9\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-gakixLPwqv\">\u7e3d\u7d50<\/h2>\n<p>\u8a2d\u7f6e\u5b57\u6bb5\u7684\u521d\u59cb\u9ed8\u8a8d\u503c\u662f SQL Server \u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u6b65\u9a5f\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u9ed8\u8a8d\u503c\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\uff0c\u4e26\u7c21\u5316\u6578\u64da\u7684\u63d2\u5165\u904e\u7a0b\u3002\u7121\u8ad6\u662f\u5728\u5275\u5efa\u65b0\u8868\u9084\u662f\u4fee\u6539\u73fe\u6709\u8868\u6642\uff0c\u6b63\u78ba\u8a2d\u7f6e\u9ed8\u8a8d\u503c\u90fd\u80fd\u70ba\u6578\u64da\u5eab\u7684\u904b\u884c\u63d0\u4f9b\u4fbf\u5229\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u6216\u5176\u4ed6\u76f8\u95dc\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\u611f\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728 SQL Server \u4e2d\u5efa\u8868\u6642\u8a2d\u7f6e\u5b57\u6bb5\u7684\u521d\u59cb\u9ed8\u8a8d\u503c\uff0c\u4e26\u67e5\u770b\u5177\u9ad4\u793a\u4f8b\u4ee5\u7c21\u5316\u6578\u64da\u7ba1\u7406\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-143703","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143703","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=143703"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143703\/revisions"}],"predecessor-version":[{"id":143704,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143703\/revisions\/143704"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143703"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143703"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143703"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}