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Message Posted: Mon, 08 Feb 2010 @ 14:33:58 GMT

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Hi,

As you mentioned "T1 has primary index with columns A,B and C"

Please check if there are some duplicate record in T1..

     Select A, B, C, COUNT(*)
     FROM T1
     GROUP BY 1, 2, 3 HAVING COUNT(*) > 1

Best Regards,

Kapil Dev Sapra

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