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Asked: 2026-05-10T16:52:07+00:00

Using the following query and results, I’m looking for the most recent entry where

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Using the following query and results, I’m looking for the most recent entry where the ChargeId and ChargeType are unique.

select chargeId, chargeType, serviceMonth from invoice      CHARGEID    CHARGETYPE  SERVICEMONTH 1   101         R           8/1/2008 2   161         N           2/1/2008 3   101         R           2/1/2008 4   101         R           3/1/2008 5   101         R           4/1/2008 6   101         R           5/1/2008 7   101         R           6/1/2008 8   101         R           7/1/2008

Desired:

    CHARGEID    CHARGETYPE  SERVICEMONTH 1   101         R           8/1/2008 2   161         N           2/1/2008
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1 Answer

  1. You can use a GROUP BY to group items by type and id. Then you can use the MAX() Aggregate function to get the most recent service month. The below returns a result set with ChargeId, ChargeType, and MostRecentServiceMonth

    SELECT   CHARGEID,   CHARGETYPE,   MAX(SERVICEMONTH) AS 'MostRecentServiceMonth' FROM INVOICE GROUP BY CHARGEID, CHARGETYPE
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