Hi,
This works for me but the result is not that what is expected. I returns
with the number of rows in the table, and the distinct has no effect because
there is only one row in the result.
Best Regards,
Otto
----- Original Message -----
From: "Foster, Stephen" <stephenlfoster@comcast.net>
To: "'Havasvölgyi Ottó'" <h.otto@freemail.hu>; "'Jaime Casanova'"
<systemguards@gmail.com>
Cc: <pgsql-sql@postgresql.org>
Sent: Sunday, December 11, 2005 2:12 AM
Subject: Re: [SQL] select count of distinct rows
Well this should work but I tried it and it didn't.
SELECT DISTINCT COUNT(*) FROM mytable;
-----Original Message-----
From: pgsql-sql-owner@postgresql.org
[mailto:pgsql-sql-owner@postgresql.org] On Behalf Of Havasvölgyi Ottó
Sent: Saturday, December 10, 2005 7:07 PM
To: Jaime Casanova
Cc: pgsql-sql@postgresql.org
Subject: Re: [SQL] select count of distinct rows
Hi,
Yes, I need to compare all fields. Well, in this case it does not. Is
this
impossible?
Thanks,
Otto
----- Original Message -----
From: "Jaime Casanova" <systemguards@gmail.com>
To: "Havasvölgyi Ottó" <h.otto@freemail.hu>
Cc: <pgsql-sql@postgresql.org>
Sent: Sunday, December 11, 2005 1:57 AM
Subject: Re: [SQL] select count of distinct rows
On 12/10/05, Havasvölgyi Ottó <h.otto@freemail.hu> wrote:
> Hi,
>
> I would like to select the count of distinct rows in a table.
>
> SELECT COUNT(DISTINCT *) FROM mytable;
>
are really all the fields distincts? the table doesn't have a pk?
> This does not work. How can I do it with Postgres?
>
> Thanks,
> Otto
>
--
regards,
Jaime Casanova
(DBA: DataBase Aniquilator ;)
---------------------------(end of broadcast)---------------------------
TIP 4: Have you searched our list archives?
http://archives.postgresql.org
---------------------------(end of broadcast)---------------------------
TIP 4: Have you searched our list archives?
http://archives.postgresql.org
--
No virus found in this incoming message.
Checked by AVG Free Edition.
Version: 7.1.371 / Virus Database: 267.13.13/197 - Release Date:
12/9/2005
--
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.371 / Virus Database: 267.13.13/197 - Release Date:
12/9/2005
---------------------------(end of broadcast)---------------------------
TIP 4: Have you searched our list archives?
http://archives.postgresql.org
