From: Ian Barwick <barwick@gmx.net>
To: "Vangelis-Maria Tougia" <tougias@cytanet.com.cy>,
	<pgsql-sql@postgresql.org>
Subject: Re: UPDATE table SET col = (SELECT ...)
Date: Thu, 26 Jun 2003 23:11:10 +0200
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On Wednesday 25 June 2003 11:00, Vangelis-Maria Tougia wrote:
> Hi,
> I found follwing email sent to you in internet.
> I am interested in same issue myself.
> Did you finally found out any more information about how to Update a column
> of a table by selecting value from another table?

Not sure if this has been answered previously, but here goes:

> Hello,
>
> If I understand the SQL references I have read, UPDATEs are allowed to
> pull data from SELECT statements, something like
>
>   UPDATE table SET col1 = (SELECT val1 FROM table WHERE id = 34),
>                SET col2 = (SELECT val2 FROM table WHERE id = 34)
                 ^^^
>          WHERE id = 35;

The second "SET" is not necessary or allowed and is causing the update to
fail.


Ian Barwick
barwick@gmx.net