From: Bruce Momjian <pgman@candle.pha.pa.us>
To: tp@emaze.net
Cc: pgsql-sql@postgresql.org
Subject: Re: UPDATE & LIMIT together?
Date: Wed, 28 Aug 2002 13:01:36 -0400 (EDT)
Message-ID: <200208281701.g7SH1aI20777@candle.pha.pa.us> (raw)
In-Reply-To: <20020828160929.GL20155@emaze.net>
You have to use a subquery returning the tables primary key to the
UPDATE:
UPDATE tab SET x=1
WHERE (primkey, col) IN (
SELECT primkey,col FROM tab
ORDER BY col
LIMIT 10)
---------------------------------------------------------------------------
tp wrote:
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> Hi
>
> I want to SELECT at max. 10 rows and SET a variable for the
> select 10 rows with the same query.
>
> Under mysql i can use:
> UPDATE table SET uniq_iq=12345 LIMIT 10
> SELECT * FROM table WHERE uniq_id=1234;
>
> This is not supported by postgres.
>
> Is there some easy solution that does not require locking?
>
>
> -tp
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--
Bruce Momjian | http://candle.pha.pa.us
pgman@candle.pha.pa.us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
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To: pgsql-sql@postgresql.org
Cc: pgman@candle.pha.pa.us, tp@emaze.net
Subject: Re: UPDATE & LIMIT together?
In-Reply-To: <200208281701.g7SH1aI20777@candle.pha.pa.us>
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