From: Josh Berkus <josh@agliodbs.com>
To: C F <tacnaboyz@yahoo.com>
To: pgsql-sql@postgresql.org
Subject: Re: SQL Help
Date: Fri, 30 May 2003 09:37:12 -0700
Message-ID: <200305300937.12158.josh@agliodbs.com> (raw)
In-Reply-To: <20030530154703.37238.qmail@web20415.mail.yahoo.com>
References: <20030530154703.37238.qmail@web20415.mail.yahoo.com>
CF,
> select
> (case when column1 = column2 then column3 end) as alias1,
> (case when column1 = column2 then column4 end) as alias2,
> (case when column1 = column2 then column5 end) as alias3,
> (case when column6 = column7 then column8 end) as alias4
> from
> mytable
Given the information you've given us (including your first e-mail), I can't
think of a better way to get the output you want than the above. You could
work through subselects, etc, but I think that would be even less efficient.
One thing you might want to think about is your whole approach to designing
this application; it may be that you can simplify your queries by changing
your table design.
--
Josh Berkus
Aglio Database Solutions
San Francisco
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To: pgsql-sql@postgresql.org
Cc: josh@agliodbs.com, tacnaboyz@yahoo.com
Subject: Re: SQL Help
In-Reply-To: <200305300937.12158.josh@agliodbs.com>
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