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Conditional expresion in query

From: JORGE MALDONADO <jorgemal1960(at)gmail(dot)com>
To: pgsql-novice(at)postgresql(dot)org
Subject: Conditional expresion in query
Date: 2012-02-09 15:25:08
Message-ID: CAAY=A780HT7gzBmt2HhnsxAR26DzhLVo1HXXAPkiCE5k492+DA@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-novice
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

Responses

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Next:From: Carlos MennensDate: 2012-02-09 15:33:11
Subject: Re: Two Tables That Share Data?
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