How do I perform a GROUP BY on an aliased column in MS-SQL Server?

Question

I\'m trying to perform a group by action on an aliased column (example below) but can\'t determine the proper syntax.

SELECT       LastName + \', \'         


        

Answer 1

You pass the expression you want to group by rather than the alias

SELECT       LastName + ', ' + FirstName AS 'FullName'
FROM         customers
GROUP BY      LastName + ', ' + FirstName