Re: UNION question

From: Brandon Metcalf <brandon(at)geronimoalloys(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: UNION question
Date: 2009-07-10 16:34:48
Message-ID: Pine.LNX.4.58L.0907101133520.6574@cedar.geronimoalloys.com
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t == tgl(at)sss(dot)pgh(dot)pa(dot)us writes:

t> Brandon Metcalf <brandon(at)geronimoalloys(dot)com> writes:
t> > I tried moving the last group of WHERE, GROUP BY, and ORDER BY before
t> > the UNION with the query it belongs to, but that results in a
t> > different syntax error.

t> I think that's probably what you want to do. What you're missing is
t> you need parentheses to put an ORDER BY into an arm of a UNION:

t> (SELECT ... ORDER BY ...) UNION SELECT ...

t> Otherwise it wants to consider the ORDER BY as applying to the UNION
t> output.

Indeed. It was the fact that I was trying to move the ORDER BY along
with WHERE and GROUP BY that was giving me grief.

Thanks.

--
Brandon

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