From: Stephan Szabo <sszabo@megazone.bigpanda.com>
To: sad <sad@bankir.ru>
Cc: pgsql-sql@postgresql.org
Subject: Re: a wierd query
Date: Thu, 13 May 2004 22:24:06 -0700 (PDT)
Message-ID: <20040513222259.D23568@megazone.bigpanda.com> (raw)
In-Reply-To: <200405140745.48296.sad@bankir.ru>
References: <323910-220045413878445@M2W099.mail2web.com>
<200405131134.35156.sad@bankir.ru>
<40A393FF.3030806@onesystem.com>
<200405140745.48296.sad@bankir.ru>
On Fri, 14 May 2004, sad wrote:
> On Thursday 13 May 2004 19:27, you wrote:
> > sad wrote:
> > > select distinct a as F from table
> > > union
> > > select distinct b as F from table;
> >
> > Note that UNION only returns the unique values of the union
> > You can get repeated values by using UNION ALL.
>
> read the original problem
> look at the DISTINCT clause in my query
> and think again
What about the fact that union already removes duplicates?
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To: pgsql-sql@postgresql.org
Cc: sszabo@megazone.bigpanda.com, sad@bankir.ru
Subject: Re: a wierd query
In-Reply-To: <20040513222259.D23568@megazone.bigpanda.com>
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