| From: | Giles Lean <giles(at)nemeton(dot)com(dot)au> |
|---|---|
| To: | GCS <gcs(at)c64(dot)rulez(dot)org> |
| Cc: | pgsql-novice(at)postgresql(dot)org |
| Subject: | Re: Table joining problem. |
| Date: | 2001-05-28 12:33:31 |
| Message-ID: | 20010528123331.22067.qmail@nemeton.com.au |
| Views: | Whole Thread | Raw Message | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-novice |
> I am not really novice, but not good either. I have a problem if the
> table is empty, my select does not return anything then.
> I have three tables,
> 1. users(nick varchar(),number int serial)
> 2. teams(owner references users)
> 3. challange(who references users)
> I want to get all the users, who has a team, but not yet in the challange
> table:
Perhaps:
select user.nick, users.number from users, teams
where users.number = teams.owner and
not exists (select * from challenge where challenge.who = users.number);
Regards,
Giles
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