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how to pull the earlest date of procedures

whttc
whttc asked
on
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Last Modified: 2014-06-02
I would like to pull procedures which are negotiated earlest date.  If I wrote this aggregate query below, I will pull more than one earlest procedures because the variable qty has different numbers under these variables a.sponsor, a.protocol, a.investigator_id, a.il_prcode.

I guess i have to write a subquery to solve this problem. please suggest.
Thanks



select a.sponsor, a.protocol, a.investigator_id, a.il_prcode, qty, min(a.modify_date)as modify_date

from Abbott_Neg a
group by a.sponsor, a.protocol, a.investigator_id, a.il_prcode, a.qty
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