On Tue, Apr 12, 2005 at 12:24:21 -0500, "A. R. Van Hook" <[EMAIL PROTECTED]> wrote: > I have the following in a table: > oid | citkey | contby | contdate | abcontinue | ccdate > ---------+------------+----------+------------+------------+------------ > 5774835 | 04-0594703 | | | | > 5775325 | 04-0594703 | Attorney | 04/06/2005 | 6 | 03/07/2005 > 5776060 | 04-0594703 | Attorney | 05/04/2005 | 6 | 04/05/2005 > 5776067 | 04-0594703 | Attorney | 05/04/2005 | 6 | 04/05/2005 > > I am trying to pull rows that have the max. contdate. Why does the > following give more than 2 rows? > ql "select oid,* from ccontinue where citkey ='04-0594703' group by > oid,citkey,contby,contdate,abcontinue,ccdate having max(contdate) = > contdate"
If you group by oid you are going to get a separate group for each row. You haven't told us what you actually expect for output, so I don't have specific advise for a query. However, you might find the Postgres extension DISTINCT ON useful, depending on exactly what you want. > oid | citkey | contby | contdate | abcontinue | ccdate > ---------+------------+----------+------------+------------+------------ > 5776067 | 04-0594703 | Attorney | 05/04/2005 | 6 | 04/05/2005 > 5775325 | 04-0594703 | Attorney | 04/06/2005 | 6 | 03/07/2005 > 5776060 | 04-0594703 | Attorney | 05/04/2005 | 6 | 04/05/2005 > (3 rows) > > thanks > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/docs/faq ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
