From: Tom Lane <tgl@sss.pgh.pa.us>
To: Amos Hayes <ahayes@polkaroo.net>
Cc: pgsql-sql@postgresql.org
Subject: Re: Find min and max values across two columns?
Date: Fri, 24 Mar 2006 16:00:35 -0500
Message-ID: <9558.1143234035@sss.pgh.pa.us> (raw)
In-Reply-To: <DAD4674C-1896-4F24-B43B-B884491DB931@polkaroo.net>
References: <DAD4674C-1896-4F24-B43B-B884491DB931@polkaroo.net>
Amos Hayes <ahayes@polkaroo.net> writes:
> I'm trying to build a query that among other things, returns the
> minimum and maximum values contained in either of two columns.
I think you might be looking for
select greatest(max(columnA), max(columnB)) from tab;
select least(min(columnA), min(columnB)) from tab;
greatest/least are relatively new but you can roll your own in
older PG releases.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, ahayes@polkaroo.net
Subject: Re: Find min and max values across two columns?
In-Reply-To: <9558.1143234035@sss.pgh.pa.us>
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