Using the field name alias in SQL Where clause

Deepak Vasa — Mon, 16 Mar 2009 23:39:29 +0000

Often I encounter SQL queries where I would love to use the alias names of my columns in the WHERE clause, today while trawling around the web I found a cool and easy way to do it. Here’s an example:

WITH Customer_Info AS
(
SELECT (Surname + ‘, ‘ + Firstname) AS FullName,
(Address_Line_1 + ‘,’ + Address_Line_2) AS Customer_Address
FROM Customers
)
SELECT FullName, Customer_Address
FROM Customer_Info
WHERE FullName LIKE ‘Smith%’

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Using the field name alias in SQL Where clause