How to select first row of each group in a group by statement

Table
ProdCode   PackType   BatchCode   ExpDate
BURSLO               1             BS20GO-2001   01/12/2004
BURSLO               1             BS20GO-2011   01/01/2007
BURSLO               2             BS20GO-2027   01/02/2003
BURSLO               3             BS20GO-2060   01/02/2004
BURSOI               9             BU10F12   01/02/2006
BURSOI               9             BU10GO-1301   01/05/2005
BURSOI              11             BU10GO-131   01/06/2008
BURSOI               2             BU10GO-1311   01/06/2007
BURSOI              13             BU10GO-1328   01/07/2006
Output
ProdCode   PackType   BatchCode   ExpDate
BURSLO               1             BS20GO-2011   01/01/2007
BURSLO               2             BS20GO-2027   01/02/2003
BURSLO               3             BS20GO-2060   01/02/2004
BURSOI               9             BU10F12   01/02/2006
BURSOI              11             BU10GO-131   01/06/2008
BURSOI               2             BU10GO-1311   01/06/2007
BURSOI              13             BU10GO-1328   01/07/2006
i need first row after group by ProdCode,    PackType and decreading order of ExpDate
Please Help me.
Thanks.

Try the below:
;With cte
as
(Select *,Row_Number()Over(partition by Prodcode,Packtype Order by expdate desc) Rn From Tablename)
Select * From cte where rn=1

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Edit:
PS. The [url http://download.oracle.com/docs/cd/E11882_01/server.112/e17118/functions004.htm#i81407]docs have more examples on using analytical functions ;-)
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you cannot delete a post yourself. You can flag the post an request a moderator remove.

How to select first row of each group in a group by statement

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