Re: Building a "complex" select?

From: Scott Marlowe <smarlowe(at)g2switchworks(dot)com>
To: Bjørn T Johansen <btj(at)havleik(dot)no>
Cc: pgsql-general(at)postgresql(dot)org
Subject: Re: Building a "complex" select?
Date: 2005-04-18 16:50:36
Message-ID: 1113843036.20921.500.camel@state.g2switchworks.com
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On Mon, 2005-04-18 at 11:24, Bjørn T Johansen wrote:
> I need a select like this..:
>
> select ordre.id, ordre.desc, log_stop.stoptype from ordre left outer join log_stop on
> ordre.id = log_stop.ordreid where ordre.id = 22
>
> The problem is that I need to include "where log_stop.stoptype = 1". So if log_stop
> includes 3 rows with stoptype = 1 and ordreid = 22, my select should return 3 rows.
> Also, if log_stop includes 3 rows with stoptype = 1 and 2 rows with stoptype = 2, my
> select should still return 3 rows. And if there are 0 rows with stoptype = 1, my
> select should return 1 row.

Would this work?

select ordre.id, ordre.desc, log_stop.stoptype from ordre left outer join log_stop on
ordre.id = log_stop.ordreid where ordre.id = 22 AND COALESCE(log_stop.stoptype,1)=1

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