Skip site navigation (1) Skip section navigation (2)

SQL command join question

From: "Ehab Galal" <ehabgalal123(at)hotmail(dot)com>
To: pgsql-sql(at)postgresql(dot)org
Subject: SQL command join question
Date: 2006-11-30 00:41:42
Message-ID: BAY24-F23D89B0EEF2CFB0C611FFA96DB0@phx.gbl (view raw or flat)
Thread:
Lists: pgsql-sql
Hi,

I have three tables t1(a, b, c, d), t2(a, b, c, k), and t3(c, e). I need to 
outer join them as shown below, but only have all tuples from t1 as output. 
But the following syntax does not allow me to do so.

SELECT t1.*
FROM (t1 outer join t2 on (t1.a=t2.a and t1.b=t2.b)) t outer join t3 on 
(t1.c=t3.c);

I'm getting the following error message:
ERROR:  invalid reference to FROM-clause entry for table "t1"
HINT:  There is an entry for table "t1", but it cannot be referenced from 
this part of the query.

I'll be grateful if someone may help me with this.

Thanks,
Ehab

_________________________________________________________________
Fixing up the home? Live Search can help 
http://imagine-windowslive.com/search/kits/default.aspx?kit=improve&locale=en-US&source=hmemailtaglinenov06&FORM=WLMTAG


Responses

pgsql-sql by date

Next:From: Phillip SmithDate: 2006-11-30 00:46:14
Subject: Re: SQL command join question
Previous:From: James RobinsonDate: 2006-11-29 17:59:50
Subject: Re: Subselects in CHECK clause ...

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group