Re: UPDATE with correlatted subquery

From: Jesus M. Salvo Jr. <john_at_softgame.com.au>
Date: Fri, 01 Feb 2002 08:16:57 GMT
Message-ID: <Z9s68.28093$Ni2.155152@news-server.bigpond.net.au>

Sorry, I meant:

UPDATE points_ranking
SET points = points +

   (
   SELECT SUM( b.points )
    FROM sgtest.game a, sgtest.transaction b, sgtest.player c     WHERE

     a.game_type_id = 10 AND
     c.service_provider_id = 3 AND
     b.game_id = a.game_id AND
     b.player_id = c.player_id AND
     c.player_id (+) = points_ranking.player_id AND
     a.start_date > fromdate

    GROUP BY 3, 10, c.player_id
   )
WHERE
   service_provider_id = 3 AND
   game_type_id = 10;

"Jesus M. Salvo Jr." <john_at_softgame.com.au> wrote in message news:E8s68.28091$Ni2.155141_at_news-server.bigpond.net.au...
> I have also tried:
>
> UPDATE points_ranking
> SET points = points +
> (
> SELECT points_ranking.points + SUM( b.points )
> FROM sgtest.game a, sgtest.transaction b, sgtest.player c
> WHERE
> a.game_type_id = 10 AND
> c.service_provider_id = 3 AND
> b.game_id = a.game_id AND
> b.player_id = c.player_id AND
> c.player_id (+) = points_ranking.player_id AND
> a.start_date > fromdate
> GROUP BY 3, 10, c.player_id
> )
> WHERE
> service_provider_id = 3 AND
> game_type_id = 10;
>
>
> .... but a subquery cannot come after the "points +" and so is a
compilation
> error.
>
>
> "Jesus M. Salvo Jr." <john_at_softgame.com.au> wrote in message
> news:c_r68.28065$Ni2.154878_at_news-server.bigpond.net.au...
> > I want to update multiple rows but one column of a table based on a
> > subquery. The idea is to increase ( or decrease ) the points of a player
> > based on additional points that he/she may have earned after a certain
> > period:
> >
> > UPDATE points_ranking
> > SET points =
> > (
> > SELECT points_ranking.points + SUM( b.points )
> > FROM sgtest.game a, sgtest.transaction b, sgtest.player c
> > WHERE
> > a.game_type_id = 10 AND
> > c.service_provider_id = 3 AND
> > b.game_id = a.game_id AND
> > b.player_id = c.player_id AND
> > c.player_id (+) = points_ranking.player_id AND
> > a.start_date > fromdate
> > GROUP BY 3, 10, c.player_id
> > )
> > WHERE
> > service_provider_id = 3 AND
> > game_type_id = 10;
> >
> >
> > ... where fromdate is a variable.
> >
> >
> > However, the points column is NOT NULL, and it is possible that the
> > correlational subquery may not return any rows for the player where it
is
> > correlated to ... resulting in a:
> >
> > ORA-01407: cannot update ("AGGREGATOR"."POINTS_RANKING"."POINTS") to
NULL
> >
> > Does anybody have an idea on how to perform an UPDATE from a
correlational
> > subquery that ensures that each row being UPDATEd has a row from the
> > correlated subquery?
> >
> > I have tried placing an outer join either way ... still the same.
> >
> >
> > John
> >
> >
> >
>
>
Received on Fri Feb 01 2002 - 02:16:57 CST