Hi, I'm creating a dynamic group of values using SELECT and UNION

Example:
(SELECT Description = 'Changed PhoneNumber from ' + @old_PhoneNumber + ' to ' + @PhoneNumber
WHERE @PhoneNumber <> @old_PhoneNumber UNION ALL

SELECT Description = 'Changed FaxNumber from ' + @old_FaxNumber + ' to ' + @FaxNumber
WHERE @FaxNumber <> @old_FaxNumber UNION ALL

SELECT Description = 'Changed EmailAddress from ' + @old_EmailAddress + ' to ' + @EmailAddress
WHERE @EmailAddress <> @old_EmailAddress)

The problem here is that SQL Server thinks "Description" is an int (by default probably) and gives me an error when I try to assign a string to it.

I'm taking that information and using it as a field in a INSERT INTO ... SELECT statement, so I don't think I am able to use a DECLARE statement or if that would even work.

Does anyone know how I can make it so that Description is always a varchar?