Kim Bisgaard <[EMAIL PROTECTED]> writes: > I have two BIG tables (virtually identical) with 3 NOT NULL columns > Station_id, TimeObs, Temp_XXXX, with indexes on (Station_id, TimeObs) > and valid ANALYSE (set statistics=100). I want to join the two tables > with a FULL OUTER JOIN.
I'm confused. If the columns are NOT NULL, why isn't this a valid transformation of your original query? > select temp_max_60min,temp_dry_at_2m > from station s natural join > temp_dry_at_2m a full outer join temp_max_60min b using (station_id, timeobs) > where s.wmo_id=6065 > and _a.timeobs='2004-1-1 0:0:0' and b._timeobs='2004-1-1 0:0:0' > and '2004-1-1 0:0:0' between s.startdate and s.enddate; Seems like it's not eliminating any rows that would otherwise succeed. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly