Max date

Question

I'm trying to pull records that have the max date from multiple subqueries. I've tried different sql statements, but am not able to get the results I want. I want the last record only from the three rows in the result set (the latest/max date). I'm thinking I need to do a max(date) in the from clause and then select out of it but I'm having difficulties.
Any suggestions welcome!
Example:
select w.name, m.ida2a2, m.role, m.ida3a4, max(m.updatestampa2) as "UPDATE"
from map m , user w
where m.ida2a2 in (select ida3a5
from link
where ida3b5 in (select ida3teamid
from pdoc)
and role in ('PI')
and ida3a4 != 0
and w.ida2a2 = m.ida3a4
group by w.name,m.ida2a2, m.role, m.ida3a4
SQL Results:
NAME Ida2a2 ROLE Ida3a4 UPDATE
stella 78420 PI 6171 16-DEC-05
stella 88057 PI 6171 20-DEC-05
stella 123432 PI 6171 06-JAN-06

Answer 1

C,
Thanks for your help. I don't think I explained myself clearly, may the below will help me clarify.
I want the max update for each group of rows only. ie stella 06-JAN-06, carson 09-JAN-06, lee I need to get the hour,minute, and seconds to figure out which 31-JAN-06 is max, but I wanted the main algorthim correct first.
For example:
group one of result set rows
NAME Ida2a2 ROLE Ida3a4 UPDATE
stella 78420 PI 6171 16-DEC-05
stella 88057 PI 6171 20-DEC-05
stella 123432 PI 6171 06-JAN-06
carson 79138 PI 6207 16-DEC-05
carson 90679 PI 6207 20-DEC-05
carson 130781 PI 6207 09-JAN-06
lee 227198 PI 215068 30-JAN-06
lee 390372PI 215068 31-JAN-06
lee 390682PI 215068-31-JAN-06