Re: Conditional expresion in query

----- Original Message -----

From: JORGE MALDONADO

To: pgsql-novice@postgresql.org

Sent: Thursday, February 09, 2012 3:25 PM

Subject: [NOVICE] Conditional expresion in query

I have been reading about contidional expresions in a query and I have a question about the following example included in the documentation:

SELECT a,      CASE WHEN a=1 THEN 'one'           WHEN a=2 THEN 'two'           ELSE 'other'      END   FROM test;

I would like to make a few changes but I need to give a name (an alias) to the result of  the CASE. Can an "AS" be added as shown below?

SELECT a, b,      CASE WHEN a=b THEN a           ELSE a || '-' || b      END AS ab   FROM test;

Respectfully,

Jorge Maldonado