> Also, I produced a second query using PostgreSQL:
> select a.id_i, a.ir_id, a.test, a.stamp
> from test a
> join
> (
> select max(stamp) as mstamp, id_i
> from test
> group by id_i
> ) b
> on a.stamp = b.mstamp
> where a.test = false
> ;
> -- result
> id_i | ir_id | test | stamp
> ------+-------+------+---------------------
> 4 | 8 | f | 2006-06-05 08:00:00
I found this query produced the same result. It is a list slower than the first with my small
dataset. but maybe it will improve for larger datasets?
select t1.id_i, t1.ir_id, t1.test, t1.stamp, t1.inttest
from test as t1
where t1.stamp = ( select max(T2.stamp) from test as t2 where t2.id_i = t1.id_i)
and t1.test = 'f';
Regards,
Richard Broersma Jr.
