From: | Richard Broersma <richard(dot)broersma(at)gmail(dot)com> |
---|---|
To: | Gavin Baumanis <gavinb(at)eclinic(dot)com(dot)au> |
Cc: | Carol Cheung <cacheung(at)consumercontact(dot)com>, pgsql-sql(at)postgresql(dot)org |
Subject: | Re: left outer join on more than 2 tables? |
Date: | 2009-06-16 22:45:03 |
Message-ID: | 396486430906161545u512acc33lbd67f78174434509@mail.gmail.com |
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Lists: | pgsql-sql |
On Tue, Jun 16, 2009 at 2:39 PM, Gavin Baumanis<gavinb(at)eclinic(dot)com(dot)au> wrote:
> At the risk of being wrong.... (I'm always ready to learn something new) -
> and seemingly I'm only too happy to be wrong!...
>
> And... it might even be that it is exactly the same result - but I would
> have proposed;
>
> SELECT
> R.region_name,
> Count(*) AS RegionComplaints
> FROM
> Region AS R
> LEFT JOIN City AS Ci
> LEFT JOIN Complaint AS Cm ON Ci.id = Cm.city_id
> ON R.id = C.region_id
> GROUP BY
> R.region_name;
Yup, it produces the same result.
--
Regards,
Richard Broersma Jr.
Visit the Los Angeles PostgreSQL Users Group (LAPUG)
http://pugs.postgresql.org/lapug
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