From: Havasvölgyi Ottó <h.otto@freemail.hu>
To: pgsql-sql@postgresql.org
To: Frank Bax <fbax@sympatico.ca>
Subject: Re: select count of distinct rows
Date: Sun, 11 Dec 2005 02:29:26 +0100
Message-ID: <008601c5fdf2$5332d380$0200a8c0@OTTO> (raw)
References: <20051209053849.498E8F0BEC@svr2.postgresql.org>
<5.2.1.1.0.20051210202158.0344ac80@pop6.sympatico.ca>
Oh, that's it.
Thank you all very much.
Otto
----- Original Message -----
From: "Frank Bax" <fbax@sympatico.ca>
To: <pgsql-sql@postgresql.org>
Sent: Sunday, December 11, 2005 2:23 AM
Subject: Re: [SQL] select count of distinct rows
At 07:53 PM 12/10/05, Havasvölgyi Ottó wrote:
>I would like to select the count of distinct rows in a table.
> SELECT COUNT(DISTINCT *) FROM mytable;
>This does not work. How can I do it with Postgres?
select count(*) from (select distinct * from mytable) as x;
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Cc: h.otto@freemail.hu, fbax@sympatico.ca
Subject: Re: select count of distinct rows
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