From: Christoph Haller <ch@rodos.fzk.de>
To: pgsql-sql@postgresql.org
Cc: Andreas.Pflug@web.de
Subject: Re: UPDATE FROM portability
Date: Wed, 26 Mar 2003 11:27:14 +0100
Message-ID: <3E818082.FFE8E2C7@rodos.fzk.de> (raw)
>
> Updating some rows in tab1 with corresponding values from tab2, pgsql
style:
>
> UPDATE tab1
> SET value=T2.VALUE
> FROM tab2 T2
> WHERE T2.restr=1
> AND tab1.key=T2.key <<<<<<
>
> The same for MSSQL:
>
> UPDATE tab1
> SET value=T2.VALUE
> FROM tab1 T1
> JOIN tab2 T2 ON T1.key=T2.Key <<<<<<
> WHERE T2.restr=1
>
>
> I'm looking for a portable query style, without using a subquery in
the
> SET clause (which could make things quite slow)
> Any hints?
>
In postgres this should work as well
UPDATE tab1
SET value=tab2.VALUE
WHERE tab2.restr=1
AND tab1.key=tab2.key
I have to admit I don't know nothing about mssql,
so I have no idea if this is of any real help.
Regards, Christoph
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To: pgsql-sql@postgresql.org
Cc: ch@rodos.fzk.de, Andreas.Pflug@web.de
Subject: Re: UPDATE FROM portability
In-Reply-To: <3E818082.FFE8E2C7@rodos.fzk.de>
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