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Query using not in clause
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À
25/02/2004 11:32:35
Information générale
Forum:
Visual FoxPro
Catégorie:
Codage, syntaxe et commandes
Divers
Thread ID:
00880737
Message ID:
00880755
Vues:
24
Try
SELECT DIST PolicyID FROM Policy ;
  WHERE PolicyDate <= {2003/12/31} AND PolicyID NOT IN ( ;
     SELECT DIST PolicyID FROM Policy ;
       WHERE PolicyDate > {2003/12/31})
>I have a policy table with 2 years worth of data. Each record is either a year 2003 or 2004 record. I need to know which policy does not have a 2004 record. I remember seeing something about using two selects with a "Not IN ( select ......)" clause.
>
>I know I can create two table and scan one and check it against the other but I was looking for a SQL solution.
>
>Couldn't find anything in Help or Hacker's on this or didn't look in the right places.
>Thanks
>Gaylen
--sb--
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