Re: slow update

Ooops, I see where my structure was wrong.

It should have read,

update table set TEMP_id = '555'
where id in (select id from different_table)


so im setting a field to 555 based on the id in different_table that matches
the id in table.

Does that make sense?
Thanks
Chad

----- Original Message -----
From: "Bruno Wolff III" <bruno@wolff.to>
To: "Chad Thompson" <chad@weblinkservices.com>
Cc: "pgsql-novice" <pgsql-novice@postgresql.org>
Sent: Wednesday, April 30, 2003 11:33 AM
Subject: Re: [NOVICE] slow update


> On Wed, Apr 30, 2003 at 10:12:35 -0600,
>   Chad Thompson <chad@weblinkservices.com> wrote:
> > Hey guys/gals
> > I have a update that is slow and I cant get my head around a way to make
it
> > faster.
> >
> > update table set id = '555'
> > where id in (select id from different_table)
> >
> > pretty simple... i tried using exists as well.. but it still seems to be
> > very slow.
>
> This will probably run faster in 7.4 as "in" has been improved.
>
> If id is a unique column in different table, then you might try the
following:
> update table set id = '555' from different_table where table.id =
>   different_table.id
>
>
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