How do I perform an IF…THEN in an SQL SELECT?

Question

How do I perform an IF...THEN in an SQL SELECT statement?

For example:

SELECT IF(Obsolete = \'N\' OR InStock = \'Y\' ? 1 :          


        

Answer 1

You can have two choices for this to actually implement:

1. Using IIF, which got introduced from SQL Server 2012:

   SELECT IIF ( (Obsolete = 'N' OR InStock = 'Y'), 1, 0) AS Saleable, * FROM Product
   

2. Using Select Case:

   SELECT CASE
       WHEN Obsolete = 'N' or InStock = 'Y'
           THEN 1
           ELSE 0
       END as Saleable, *
       FROM Product