From: Josh Berkus <josh@agliodbs.com>
To: pgsql-sql@postgresql.org
Subject: Re: update help
Date: Wed, 17 Jan 2001 20:04:45 -0800
Message-ID: <web-1178595@davinci.ethosmedia.com> (raw)
In-Reply-To: <22930.979787939@sss.pgh.pa.us>
Tom,
> UPDATE t1 SET amount = (select sum(b.amount) from t2 b
> WHERE t1.id = b.id);
Interesting. I'm used to (not necessarily in PGSQL):
UPDATE t1 SET amount = t2ttl.totalamount
FROM (SELECT sum(amount) as totalamount,
id FROM t2 GROUP BY id) t2ttl
WHERE t1.id = t2.id
Although this is a subselect in the FROM clause, something
we've had trouble with as I recall.
-Josh Berkus
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To: pgsql-sql@postgresql.org
Cc: josh@agliodbs.com
Subject: Re: update help
In-Reply-To: <web-1178595@davinci.ethosmedia.com>
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