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Message Posted: Sun, 17 Jul 2005 @ 10:26:52 GMT

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Hi,

I would write the query something like

     SELECT
          X
        , COUNT(*)
     FROM X
        INNER JOIN (SELECT
                        MAX(REC_DATE) AS MAX_REC_DATE
                    FROM Y) AS dt1
          ON DATE BETWEEN dt1.MAX_REC_DATE
                      AND ADD_MONTHS(dt1.MAX_REC_DATE, -3)
     GROUP BY 1
     ORDER BY 1

Hope this helps.

Matthew Winter

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