pg.ddx.io pgsql-interfaces@postgresql.org mailing list archive
help / color / mirror / Atom feedouter joins
2+ messages / 2 participants
[nested] [flat]
* outer joins
@ 1999-03-08 03:00 Ken J. Wright <ken@ori-ind.com>
1999-03-08 08:02 ` Re: [INTERFACES] outer joins Denis Sbragion <sbragion.denis@usa.net>
0 siblings, 1 reply; 2+ messages in thread
From: Ken J. Wright @ 1999-03-08 03:00 UTC (permalink / raw)
To: pgsql-interfaces
So, is there an eloquent (or not) way to fake an outer join in PostgreSQL?
Ken
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: [INTERFACES] outer joins
1999-03-08 03:00 outer joins Ken J. Wright <ken@ori-ind.com>
@ 1999-03-08 08:02 ` Denis Sbragion <sbragion.denis@usa.net>
0 siblings, 0 replies; 2+ messages in thread
From: Denis Sbragion @ 1999-03-08 08:02 UTC (permalink / raw)
To: Ken J. Wright <ken@ori-ind.com>; pgsql-interfaces
Hello,
At 19.00 07/03/99 -0800, you wrote:
>So, is there an eloquent (or not) way to fake an outer join in PostgreSQL?
yes! Example of a workaround using unions:
select
X.a, X.b,
Y.a, Y.b
from
X left outer join Y on X.a = Y.a
becomes
select
X.a, X.b,
Y.a, Y.b
from
X,Y
where
X.a = Y.a
union
select
X.a, X.b,
null, null
from
X
where
not exists (select * from Y where Y.a = X.a)
Little cumbersome but it works.
Bye!
Sbragion Denis
InfoTecna
Tel, Fax: +39 039 2324054
URL: http://space.tin.it/internet/dsbragio
^ permalink raw reply [nested|flat] 2+ messages in thread
end of thread, other threads:[~1999-03-08 08:02 UTC | newest]
Thread overview: 2+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
1999-03-08 03:00 outer joins Ken J. Wright <ken@ori-ind.com>
1999-03-08 08:02 ` Denis Sbragion <sbragion.denis@usa.net>
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox