1106SQLserver基础
数据库 --- 变量 (对数据库中的数据没有任何影响) 作用:临时存储数据的作用,起一个衔接的作用,为了方便理解存储过程。 例:Declare@hellovarchar(20) Set@hello=销售部 select * from bumenwherename=@hello Select@hello=namefrombumenwherecode=1(加
数据库---变量(对数据库中的数据没有任何影响)
作用:临时存储数据的作用,起一个衔接的作用,为了方便理解存储过程。
例:Declare @hello varchar(20)
Set @hello=’销售部’
select *from bumen where name=@hello
Select @hello=name from bumen where code=1(加where条件)
Print @hello
变量放在select.....from中间时也可以使用,可以当作赋值语句,不执行查询功能。
【注意事项】只是给变量赋值的过程,不会打印结果
【注意事项】服务器名称就相当于实例名,同时安装两个版本的数据库,不能同时都用.(点)做实例名。

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