Create Procedure As sp_select @tablename Char(20), @columnname Char(20)
As
Declare @sql = 'Select ' + @columnname + ' From ' + @tablename
Execute(@sql)
As
Declare @sql = 'Select ' + @columnname + ' From ' + @tablename
Execute(@sql)
列名是不固定的,可以有多个(不确定),也可以只有一个,这样应如何处理?