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

The case statement is your friend in this situation, and takes one of two forms:

The simple case:

SELECT CASE  WHEN       THEN 
                       WHEN  THEN 
                                         ELSE 
       END AS 
FROM 
The extended case:
SELECT CASE WHEN       THEN 
            WHEN  THEN 
                             ELSE 
       END AS 
FROM 
You can even put case statements in an order by clause for really fancy ordering.

                                                        

              
                
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