Sending User Defined Column Names To A View

I want to pass user-defined column names to views or procedures



I am using SQL Server 2005 Express.



I tried this.



CREATE PROCEDURE @userDefinedColumn varChar(10) = 'My_Column'

select @userDefinedColumn, count(ID) as [Total Records] from My_Table

GROUP BY @userDefinedColumn



This was not accepted. It won't allow a user defined parameter in the group by.



But I need to pass user defined parameters to views as well.