set @sql=N'select @aa=idname,@bb=另一个字段 from table where id='+@id
exec sp_executesql @sql,N'@aa varchar(100) output,@bb varchar(100)',@idname output,@2 output
set @sql=N'select @aa=idname,@bb=另一个字段 from table where id='+@id
exec sp_executesql @sql,N'@aa varchar(100) output,@bb varchar(100)',@idname output,@2 output