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Select first complete row from each group

Select first complete row from each group

Select first complete row from each group

(OP)
Hi,
I'm trying to create this query in Informix that will return the first row from each of these "Appt"'s. I originally wanted to find the minimum date but unfortunately, there are multiple PO's and Appt's that have the same date. I know that this should probably be simple but I can't seem to get it. Help!

Mark


Appt PO Date
1 1050422199 11/2/2017
1 4050407179 11/2/2017
1 4050407187 11/2/2017
1 1050422172 11/3/2017
1 1050422185 11/4/2017
2 4150393598 11/2/2017
3 4050407178 11/2/2017


Return:

Appt PO Date
1 1050422199 11/2/2017
2 4150393598 11/2/2017
3 4050407178 11/2/2017

RE: Select first complete row from each group

(OP)
I found something that I could use to achieve this...I'll share with the forum.

ROW_NUMBER() over (partition by appt order by Date asc)

Wrap another query around this and choose where row=1

Mark

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