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 Help retrieving most recent records - group by?
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Constraint Violating Yak Guru

442 Posts

Posted - 01/08/2013 :  16:01:48  Show Profile  Reply with Quote
I have an ACTIVITY table that contains the following columns: CONTACT, NOTE, ACTIVITY_DATE.

A contact can be listed multiple times, each time with a different note and activity date.

How can I retrieve each contact and their most recent note only?


Jack		Test 1A		2012-12-25 10:33:11.840
Jack		Test 1B 	2013-01-07 04:20:00.005
Jack		Test 1C		2013-01-07 11:30:00.999
Jill		Test 2A		2010-04_10 08:22:00.222
Jill		Test 2B		2011-06_11 18:24:22.777
Jill		Test 2C		2012-09_29 01:02:33.666


Jack		Test 1C		2013-01-07 11:30:00.999
Jill		Test 2C		2012-09_29 01:02:33.666

Thanks in advance!

Flowing Fount of Yak Knowledge

8781 Posts

Posted - 01/08/2013 :  16:26:01  Show Profile  Visit webfred's Homepage  Reply with Quote
select * from
(select row_number() over(partition by CONTACT order by ACTIVITY_DATE desc) as rnum, * from ACTIVITY )dt
where rnum=1

Too old to Rock'n'Roll too young to die.
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