Try this:
select * from flood_ts F join
(SELECT lid, MAX(value) AS mvalue, event_id
FROM flood_ts
GROUP BY lid, event_id) X
on F.lid = X.lid and value = mvalue and X.event_id = F.event_id
01.04.2011, 00:15, "Mark Fenbers" :
> SQL gurus,
>
> I have a table with 4 columns: lid(varchar), value(flo
Try this. Once you know the value you want you have to join back to
find the time of that value.
Select f.Lid, F.Value,F.event_id, f.obstime
From (
SELECT lid, MAX(value) As Value, event_id
FROM flood_ts
GROUP BY lid, event_id
)sub
Join flood f On sub.Value=f.value and f.lid=sub.lid and
sub.event
