From: John Coryat <john@coryat.com>
To: pgsql-sql@postgresql.org
Subject: Complex Update
Date: Sat, 03 Jan 2004 03:20:46 -0600
Message-ID: <3FF6896E.3010602@coryat.com> (raw)
Problem: I have a table that has a field I want to plug with a value
from other tables.
I can do it with a perl program and a loop, but want to do it with a
single SQL statement.
Is there a way to do an update that combines a select statement
containing a "where" that uses a field from the row to be updated?
I would expect it to look something like this:
update orderheader set total = (select sum(amount) from orderdetail
where orderdetail.orderno=orderheader.orderno) ;
Any ideas?
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To: pgsql-sql@postgresql.org
Cc: john@coryat.com
Subject: Re: Complex Update
In-Reply-To: <3FF6896E.3010602@coryat.com>
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