Message-ID: <B5CDCF382265D311BF33009027A8FE9401E6F370@pmrmsg.edsn.com>
From: "Picard, Cyril" <cyril.picard@eads-dsn.com>
To: "'Algirdas Sakmanas'" <asakmanas@grafton.lt>
Cc: pgsql-sql@postgresql.org
Subject: RE: outer joins
Date: Wed, 4 Apr 2001 17:01:41 +0200 
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I've read that the version 7.1 provides outer join feature. Since I did not
try it yet, I've no more information about it.


> -----Message d'origine-----
> De:	Algirdas Sakmanas [SMTP:asakmanas@grafton.lt]
> Date:	mercredi 4 avril 2001 13:03
> À:	pgsql-sql@postgresql.org
> Objet:	[SQL] outer joins
> 
> Hi all,
> 
> I'm new to postgre, I've changed my work and consequently now i'm moving
> from MS plaform.
> In MS SQL there are such constructs left or right outer join, in postgres
> there are no such thing
> 
> Can You offer me strategy to make query that selects from table (a) and
> joins to it another (b)
> on e.g. a.id=b.aid but joins so that in case there is no value in table b
> NULL is left in result:
> in MS SQL i've used query:
> 
> select a.id, b.name from a left outer join b on a.id=b.aid
> 
> table a          table b
> 
> id |             aid | name
> -----------      ----------------
> 1                1   | Tom
> 2                3   | Sam
> 
> result:
> a.id  |  b.name
> ---------------------
> 1     | Tom
> 2     | NULL
> 
> thank you in advance
> 
> Algirdas Sakmanas
> IT manager
> +370 99 90369
> asakmanas@grafton.lt
> Grafton Entertainment
> http://www.tvnet.lt
> 
> 
> 
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