From: Christian Kindler <christian.kindler@gmx.net>
To: roopa perumalraja <roopabenzer@yahoo.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Solution to retrieve first and last row for each minute
Date: Wed, 22 Aug 2007 15:35:17 +0200
Message-ID: <20070822133517.107820@gmx.net> (raw)
Its really slow but what you can do is something like the following:
select count(a.*), b.* from foo.bar a,
(
select price from foo.bar order by time asc limit 1
union
select price from foo.bar order by time desc limit 1
) as b
group by b.price
... just do the "wheres" as you need ...
Chris
PS its untested maybe there are some syntax miss-spells
--
cu
Chris
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To: pgsql-sql@postgresql.org
Cc: christian.kindler@gmx.net, roopabenzer@yahoo.com
Subject: Re: Solution to retrieve first and last row for each minute
In-Reply-To: <20070822133517.107820@gmx.net>
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