https://blog.youkuaiyun.com/m0_74825108zh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/m0_74825108/article/details/146441908https://blog.youkuaiyun.com/m0_74825108/article/details/146441908m0_74825108Sat, 22 Mar 2025 16:14:52 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146432895https://blog.youkuaiyun.com/m0_74825108/article/details/146432895m0_74825108Sat, 22 Mar 2025 03:27:48 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146432477https://blog.youkuaiyun.com/m0_74825108/article/details/146432477m0_74825108Sat, 22 Mar 2025 01:51:22 +0800 新建数据库：输入数据库名称，如Info，点击确定，如下图所示：可通过右键单击Info选择"属性"来修改数据库；(3).CHECK约束：限制表中列的值，确保数据的完整性和准确性。7.查询:右键单击数据库名Info，选择"新建查询"，输入SQL语句，查询age>=20的所有内容，然后点击"执行"，结果如下图所示。(2).删除列：单击表"dbo.student"：右键单击要删除的列，然后选择"删除列"，保存即可。(3).删除：选中要删除的行，右键单击：选择"删除"。]]>https://blog.youkuaiyun.com/m0_74825108/article/details/146431676https://blog.youkuaiyun.com/m0_74825108/article/details/146431676m0_74825108Sat, 22 Mar 2025 00:14:05 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146166305https://blog.youkuaiyun.com/m0_74825108/article/details/146166305m0_74825108Mon, 10 Mar 2025 22:59:41 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146158626https://blog.youkuaiyun.com/m0_74825108/article/details/146158626m0_74825108Mon, 10 Mar 2025 17:00:31 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146150257https://blog.youkuaiyun.com/m0_74825108/article/details/146150257m0_74825108Mon, 10 Mar 2025 12:14:01 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146106840https://blog.youkuaiyun.com/m0_74825108/article/details/146106840m0_74825108Fri, 07 Mar 2025 22:24:50 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146050168https://blog.youkuaiyun.com/m0_74825108/article/details/146050168m0_74825108Wed, 05 Mar 2025 18:39:31 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146048128https://blog.youkuaiyun.com/m0_74825108/article/details/146048128m0_74825108Wed, 05 Mar 2025 17:16:25 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146044065https://blog.youkuaiyun.com/m0_74825108/article/details/146044065m0_74825108Wed, 05 Mar 2025 15:19:34 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146030985https://blog.youkuaiyun.com/m0_74825108/article/details/146030985m0_74825108Wed, 05 Mar 2025 00:47:10 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/146028866https://blog.youkuaiyun.com/m0_74825108/article/details/146028866m0_74825108Tue, 04 Mar 2025 22:29:05 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/145978917https://blog.youkuaiyun.com/m0_74825108/article/details/145978917m0_74825108Mon, 03 Mar 2025 10:50:39 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/145970855https://blog.youkuaiyun.com/m0_74825108/article/details/145970855m0_74825108Sun, 02 Mar 2025 21:40:23 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/145969282https://blog.youkuaiyun.com/m0_74825108/article/details/145969282m0_74825108Sun, 02 Mar 2025 20:21:06 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/145967755https://blog.youkuaiyun.com/m0_74825108/article/details/145967755m0_74825108Sun, 02 Mar 2025 18:42:11 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/145947913https://blog.youkuaiyun.com/m0_74825108/article/details/145947913m0_74825108Sat, 01 Mar 2025 14:52:23 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/145940837https://blog.youkuaiyun.com/m0_74825108/article/details/145940837m0_74825108Sat, 01 Mar 2025 00:20:50 +0800https://blog.youkuaiyun.com/m0_74825108/article/details/145939609https://blog.youkuaiyun.com/m0_74825108/article/details/145939609m0_74825108Fri, 28 Feb 2025 22:43:06 +0800