Re: UPDATE with correlatted subquery

From: Jesus M. Salvo Jr. <john_at_softgame.com.au>
Date: Fri, 01 Feb 2002 08:15:32 GMT
Message-ID: <E8s68.28091$Ni2.155141@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 - 02:15:32 CST