Re: Several left outer joins on a same table
От | Aaron Mulder |
---|---|
Тема | Re: Several left outer joins on a same table |
Дата | |
Msg-id | Pine.LNX.4.44.0207230806120.29067-100000@gentoo.CS.Princeton.EDU обсуждение исходный текст |
Ответ на | Several left outer joins on a same table ("Th Templ" <templ_th@hotmail.com>) |
Список | pgsql-jdbc |
Try something like: select l1.lieu_nom, l2.lieu_num from Personne p left outer join Lieu l1 on lieu_id=lieu1 left outer join Lieu l2 on lieu_id=lieu2 Aaron On Tue, 23 Jul 2002, Th Templ wrote: > Here are my tables > > Personne > ------------ > int lieu1 > int lieu2 > > Lieu > ------------ > int lieu_id > varchar(50) lieu_nom > > I want to have in a single request the name of lieu1 and/or lieu2 in the > 'Lieu' table if there is a correspondance and if there are not null. > I see the postgresql documentation and I have no problem to make one left > outer join, but two?? > > Thans for your answers > Templ > > _________________________________________________________________ > Join the worlds largest e-mail service with MSN Hotmail. > http://www.hotmail.com > > > ---------------------------(end of broadcast)--------------------------- > TIP 5: Have you checked our extensive FAQ? > > http://www.postgresql.org/users-lounge/docs/faq.html >
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