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

For anyone who finds themselves with the following problem (grouping by ensuring zero and null values are treated as equals)...

SELECT AccountNumber, Amount AS MyAlias
FROM Transactions
GROUP BY AccountNumber, ISNULL(Amount, 0)

(I.e. SQL Server complains that you haven't included the field Amount in your Group By or aggregate function)

...remember to place the exact same function in your SELECT...

SELECT AccountNumber, ISNULL(Amount, 0) AS MyAlias
FROM Transactions
GROUP BY AccountNumber, ISNULL(Amount, 0)