On Thu, Feb 01, 2001 at 04:25:38AM +0300, Rus wrote:
>
> select t2.id from gamers t1,games t2 where t1.user="jack" and t2.id<>t1.gid
> group by t2.id
>
> ---- Original Message -----
> From: zbynek <[EMAIL PROTECTED]>
> To: <[EMAIL PROTECTED]>
> Sent: Wednesday, January 31, 2001 4:31 PM
> Subject: Selecting games which a given user can join
>
>
> > I have table that stores names of players and number of the game they play
> > (one player can play more games concurrently). Other users can join the
> > game. For given user I want to display the games which he can join. The
> only
> > condition is that the user can't join any game which he already plays.
> >
> > If I have this
> >
> > +-----+---------+
> > | gid | user |
> > +-----+---------+
> > | 1 | jack |
> > | 1 | john |
> > | 1 | peter |
> > | 1 | richard |
> > | 2 | john |
> > | 2 | richard |
> > | 3 | peter |
> > | 4 | jack |
> > | 4 | peter |
> > | 5 | peter |
> > | 5 | john |
> > +-----+---------+
> >
> > then for jack I want numbers 2, 3, 5 but not 4; for peter it should be 2
> and
I have very similar problem on my MySQL 3.23.29-gamma-log.
Rus, your query does not work. More over it looks like either I don't understand what
is going on in this world, or MySQL has a big flow.
If you try a query
select gid, user from games group by gid having user <> 'jack'
and after that a query
select gid, user from games group by gid having user <> 'john'
the results will surprise you a lot. At least they did it with me.
Am I completely out of the process?
Best regards,
Lumberer.
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