{"id":161225,"date":"2024-11-04T04:39:30","date_gmt":"2024-11-03T20:39:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/161225\/"},"modified":"2024-11-04T04:39:31","modified_gmt":"2024-11-03T20:39:31","slug":"%e5%9f%ba%e6%96%bc-mssql-%e7%9a%84%e6%96%b0%e5%a2%9e%e6%ac%84%e4%bd%8d%e5%af%a6%e7%8f%be%ef%bc%88mssql-%e6%96%b0%e5%a2%9e%e6%ac%84%e4%bd%8d%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/161225\/","title":{"rendered":"\u57fa\u65bc MSSQL \u7684\u65b0\u589e\u6b04\u4f4d\u5be6\u73fe\uff08mssql \u65b0\u589e\u6b04\u4f4d\uff09"},"content":{"rendered":"<h1 id=\"%e5%9f%ba%e6%96%bc-mssql-%e7%9a%84%e6%96%b0%e5%a2%9e%e6%ac%84%e4%bd%8d%e5%af%a6%e7%8f%be%ef%bc%88mssql-%e6%96%b0%e5%a2%9e%e6%ac%84%e4%bd%8d%ef%bc%89-kIduAhvSks\">\u57fa\u65bc MSSQL \u7684\u65b0\u589e\u6b04\u4f4d\u5be6\u73fe\uff08mssql \u65b0\u589e\u6b04\u4f4d\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u96a8\u8457\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u7d93\u5e38\u9700\u8981\u5c0d\u8cc7\u6599\u8868\u9032\u884c\u4fee\u6539\uff0c\u5176\u4e2d\u65b0\u589e\u6b04\u4f4d\u662f\u4e00\u500b\u5e38\u898b\u7684\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u5728 Microsoft SQL Server\uff08MSSQL\uff09\u4e2d\u65b0\u589e\u6b04\u4f4d\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u7bc4\u4f8b\u548c\u6ce8\u610f\u4e8b\u9805\u3002<\/p>\n<h2 id=\"%e6%96%b0%e5%a2%9e%e6%ac%84%e4%bd%8d%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-kIduAhvSks\">\u65b0\u589e\u6b04\u4f4d\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u5728 MSSQL \u4e2d\uff0c\u65b0\u589e\u6b04\u4f4d\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>ALTER TABLE \u8868\u540d ADD \u6b04\u4f4d\u540d \u8cc7\u6599\u985e\u578b [\u9078\u9805];<\/code><\/pre>\n<p>\u9019\u88e1\u7684\u5404\u500b\u90e8\u5206\u89e3\u91cb\u5982\u4e0b\uff1a<\/p>\n<ul>\n<li><strong>ALTER TABLE<\/strong>: \u7528\u65bc\u4fee\u6539\u73fe\u6709\u7684\u8cc7\u6599\u8868\u3002<\/li>\n<li><strong>\u8868\u540d<\/strong>: \u9700\u8981\u65b0\u589e\u6b04\u4f4d\u7684\u8cc7\u6599\u8868\u540d\u7a31\u3002<\/li>\n<li><strong>ADD<\/strong>: \u6307\u793a\u8981\u65b0\u589e\u6b04\u4f4d\u3002<\/li>\n<li><strong>\u6b04\u4f4d\u540d<\/strong>: \u65b0\u589e\u6b04\u4f4d\u7684\u540d\u7a31\u3002<\/li>\n<li><strong>\u8cc7\u6599\u985e\u578b<\/strong>: \u65b0\u589e\u6b04\u4f4d\u7684\u8cc7\u6599\u985e\u578b\uff0c\u4f8b\u5982 INT\u3001VARCHAR\u3001DATETIME \u7b49\u3002<\/li>\n<li><strong>[\u9078\u9805]<\/strong>: \u53ef\u9078\u7684\u53c3\u6578\uff0c\u4f8b\u5982 NOT NULL\u3001DEFAULT \u503c\u7b49\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e6%96%b0%e5%a2%9e%e4%b8%80%e5%80%8b%e6%ac%84%e4%bd%8d-kIduAhvSks\">\u7bc4\u4f8b\uff1a\u65b0\u589e\u4e00\u500b\u6b04\u4f4d<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>Employees<\/code> \u7684\u8cc7\u6599\u8868\uff0c\u73fe\u5728\u9700\u8981\u65b0\u589e\u4e00\u500b\u540d\u70ba <code>BirthDate<\/code> \u7684\u6b04\u4f4d\uff0c\u8cc7\u6599\u985e\u578b\u70ba <code>DATETIME<\/code>\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>ALTER TABLE Employees ADD BirthDate DATETIME;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u8a9e\u53e5\u5f8c\uff0c<code>Employees<\/code> \u8cc7\u6599\u8868\u5c07\u6703\u65b0\u589e\u4e00\u500b <code>BirthDate<\/code> \u6b04\u4f4d\uff0c\u8a72\u6b04\u4f4d\u53ef\u4ee5\u5b58\u5132\u54e1\u5de5\u7684\u51fa\u751f\u65e5\u671f\u3002<\/p>\n<h2 id=\"%e6%96%b0%e5%a2%9e%e6%ac%84%e4%bd%8d%e6%99%82%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-kIduAhvSks\">\u65b0\u589e\u6b04\u4f4d\u6642\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u65b0\u589e\u6b04\u4f4d\u6642\uff0c\u6709\u5e7e\u500b\u91cd\u8981\u7684\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li><strong>\u8cc7\u6599\u985e\u578b\u7684\u9078\u64c7<\/strong>: \u6839\u64da\u5be6\u969b\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u8cc7\u6599\u985e\u578b\uff0c\u4ee5\u78ba\u4fdd\u8cc7\u6599\u7684\u6b63\u78ba\u6027\u548c\u6709\u6548\u6027\u3002<\/li>\n<li><strong>NULL \u548c NOT NULL<\/strong>: \u5982\u679c\u6b04\u4f4d\u4e0d\u5141\u8a31\u7a7a\u503c\uff0c\u5247\u9700\u8981\u5728\u65b0\u589e\u6b04\u4f4d\u6642\u6307\u5b9a <code>NOT NULL<\/code>\u3002\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u672a\u4f86\u63d2\u5165\u8cc7\u6599\u6642\u51fa\u73fe\u7a7a\u503c\u7684\u554f\u984c\u3002<\/li>\n<li><strong>\u9810\u8a2d\u503c<\/strong>: \u5982\u679c\u9700\u8981\u70ba\u65b0\u589e\u6b04\u4f4d\u8a2d\u7f6e\u9810\u8a2d\u503c\uff0c\u53ef\u4ee5\u5728\u8a9e\u53e5\u4e2d\u4f7f\u7528 <code>DEFAULT<\/code> \u95dc\u9375\u5b57\u3002\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre><code>ALTER TABLE Employees ADD BirthDate DATETIME DEFAULT GETDATE();<\/code><\/pre>\n<p>\u4e0a\u8ff0\u8a9e\u53e5\u5c07\u65b0\u589e\u4e00\u500b <code>BirthDate<\/code> \u6b04\u4f4d\uff0c\u4e26\u5c07\u9810\u8a2d\u503c\u8a2d\u70ba\u7576\u524d\u65e5\u671f\u548c\u6642\u9593\u3002<\/p>\n<h2 id=\"%e6%aa%a2%e6%9f%a5%e6%96%b0%e5%a2%9e%e6%ac%84%e4%bd%8d%e7%9a%84%e7%b5%90%e6%9e%9c-kIduAhvSks\">\u6aa2\u67e5\u65b0\u589e\u6b04\u4f4d\u7684\u7d50\u679c<\/h2>\n<p>\u65b0\u589e\u6b04\u4f4d\u5f8c\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\u6aa2\u67e5\u8cc7\u6599\u8868\u7684\u7d50\u69cb\uff0c\u78ba\u8a8d\u6b04\u4f4d\u662f\u5426\u6210\u529f\u65b0\u589e\uff1a<\/p>\n<pre><code>EXEC sp_help 'Employees';<\/code><\/pre>\n<p>\u9019\u500b\u8a9e\u53e5\u5c07\u986f\u793a <code>Employees<\/code> \u8cc7\u6599\u8868\u7684\u6240\u6709\u6b04\u4f4d\u53ca\u5176\u5c6c\u6027\uff0c\u65b9\u4fbf\u7528\u6236\u6aa2\u67e5\u65b0\u589e\u7684\u6b04\u4f4d\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-kIduAhvSks\">\u7e3d\u7d50<\/h2>\n<p>\u5728 MSSQL \u4e2d\uff0c\u65b0\u589e\u6b04\u4f4d\u662f\u4e00\u500b\u76f8\u5c0d\u7c21\u55ae\u7684\u64cd\u4f5c\uff0c\u4f46\u5728\u5be6\u65bd\u904e\u7a0b\u4e2d\u9700\u8981\u8b39\u614e\u8003\u616e\u8cc7\u6599\u985e\u578b\u3001NULL \u9650\u5236\u548c\u9810\u8a2d\u503c\u7b49\u56e0\u7d20\u3002\u900f\u904e\u6b63\u78ba\u7684 SQL \u8a9e\u53e5\uff0c\u6211\u5011\u53ef\u4ee5\u9748\u6d3b\u5730\u8abf\u6574\u8cc7\u6599\u8868\u7d50\u69cb\uff0c\u4ee5\u6eff\u8db3\u4e0d\u65b7\u8b8a\u5316\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u7528\u6236\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u8cc7\u6599\u5eab\u7ba1\u7406\u9084\u662f\u7db2\u7ad9\u6258\u7ba1\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728 MSSQL \u4e2d\u65b0\u589e\u6b04\u4f4d\uff0c\u7c21\u55ae\u6b65\u9a5f\u8207\u6700\u4f73\u5be6\u8e10\uff0c\u63d0\u5347\u8cc7\u6599\u5eab\u7d50\u69cb\u7684\u9748\u6d3b\u6027\u8207\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-161225","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161225","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=161225"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161225\/revisions"}],"predecessor-version":[{"id":161226,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/161225\/revisions\/161226"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=161225"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=161225"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=161225"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}