From: | Andrew McMillan <Andrew(at)catalyst(dot)net(dot)nz> |
---|---|
To: | Eric Jain <jain(at)gmx(dot)net> |
Cc: | PostgreSQL General <pgsql-general(at)postgresql(dot)org> |
Subject: | Re: COUNT DISTINCT |
Date: | 2000-07-15 09:51:14 |
Message-ID: | 39703412.5463D952@catalyst.net.nz |
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Thread: | |
Lists: | pgsql-general |
Eric Jain wrote:
>
> SELECT COUNT(DISTINCT url, id) FROM log;
> ERROR: Aggregate functions may only have one parameter
>
> SELECT COUNT(DISTINCT ON (url, id)) FROM log;
> ERROR: parser: parse error at or near "on"
>
> Any ideas how do I get this done properly?
SELECT count( DISTINCT(url,id) ) FROM log;
Seems to work for me...
Well, actually:
advert=# select count( distinct ( redirect_from ) ) from redirect;
count
-------
1980
(1 row)
rather than:
advert=# select count( redirect_from ) from redirect;
count
-------
4211
(1 row)
Cheers,
Andrew.
--
_____________________________________________________________________
Andrew McMillan, e-mail: Andrew(at)cat-it(dot)co(dot)nz
Catalyst IT Ltd, PO Box 10-225, Level 22, 105 The Terrace, Wellington
Me: +64 (21) 635 694, Fax: +64 (4) 499 5596, Office: +64 (4) 499 2267
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