设计题: 使用 SQL Server Management Studio 或 T-SQL 语句,完成下面的操作。 定义一个用户定义数据类型 today : smalldatetime , not null 。定义默认值对象 day ,取值为 getdate() ,将默认值对象 day 绑定到用户定义数据类型 today 上。
【简答题】World Elephant Day is the perfect time to find out more about these amazing animals and what we can do to preserve them so they do not go the way of the mammoth(猛犸象). World Elephant Day was created in...