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Charles Hooper  
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 More options Jul 4 2007, 9:26 am
Newsgroups: comp.databases.oracle.misc
From: Charles Hooper <hooperc2...@yahoo.com>
Date: Wed, 04 Jul 2007 06:26:36 -0700
Local: Wed, Jul 4 2007 9:26 am
Subject: Re: NOT IN
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On Jul 4, 8:47 am, colmkav <colmj...@yahoo.co.uk> wrote:

> is it possible to write an SQL Oracle query where you want to check
> whether a combination of fields exist in another query

> eg I tried the following but got an error:

> select count(*) from tmp_risk_sum where book, strategy, exposuretypeid
> not in (select book, strategy, exposuretypeid from tmp_risk_sum_ORACLE)

SELECT
  COUNT(*)
FROM
  TMP_RISK_SUM
WHERE
  (BOOK,STRATEGY,EXPOSURETYPEID) NOT IN (
    SELECT
      BOOK,
      STRATEGY,
      EXPOSURETYPEID
    FROM
      TMP_RISK_SUM_ORACLE);

You may find that this syntax executes more efficiently:
SELECT
  COUNT(*)
FROM
  TMP_RISK_SUM S,
  (SELECT DISTINCT
    BOOK,
    STRATEGY,
    EXPOSURETYPEID
  FROM
    TMP_RISK_SUM_ORACLE) SO
WHERE
  S.BOOK=SO.BOOK(+)
  AND S.STRATEGY=SO.STRATEGY(+)
  AND S.EXPOSURETYPEID=SO.EXPOSURETYPEID(+)
  AND SO.BOOK IS NULL;

Charles Hooper
IT Manager/Oracle DBA
K&M Machine-Fabricating, Inc.


 
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