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Re: Outer join question?

From: Carol Walter <walterc(at)indiana(dot)edu>
To:
Cc: pgsql-novice(at)postgresql(dot)org
Subject: Re: Outer join question?
Date: 2009-04-08 16:55:32
Message-ID: AAB665AB-E90C-41A6-B65F-D26AA169D07A@indiana.edu (view raw or flat)
Thread:
Lists: pgsql-novice
You're right.  This did it.

Thanks,
Carol

On Apr 8, 2009, at 9:12 AM, Aurimas Černius wrote:

> Hi,
>
>> I have three tables that create a many-to-many relationship between  
>> two
>> of them. One of them has person data and one of them has contact  
>> data,
>> and, of course, the other is the bridge table. I want to select all  
>> the
>> people in the people table with the last name like Smith and join it
>> with their contact information. Sometimes they have no contact
>> information, but I want to put them on my list anyway. I typically  
>> use
>> the old syntax of the "where clause" to join tables, so I have two
>> questions. Is there a syntax in postgres to do an outer join using  
>> the
>> "where clause" and what would be the correct syntax to join the three
>> tables using the newer standard,
>>
>> SELECT last_name, first_name, contact
>> FROM people
>> LEFT (or RIGHT) JOIN bridge ON bridge.peopleid = people.peopleid
>> JOIN contact ON bridge.contactid = contact.contactid
>> WHERE last_name like 'Smi%';?
>>
>> The above query is incorrect and I can't seem to get the result I'm
>> looking for.
>
>
> I think both joins should be LEFT.
>
>
> -- 
> Aurimas
>
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