Re: [SQL] Counting the number of distinct rows returned

yeah... GROUP BY should do..

try this:

SELECT COUNT(*) FROM sales_by_region GROUP BY user_id;

Regards,

-----Original Message-----
From: Tom Lane <tgl@sss.pgh.pa.us>
To: Drew Whittle <drew@albatross.co.nz>
Cc: pgsql-sql@postgreSQL.org <pgsql-sql@postgreSQL.org>
Date: Thursday, August 19, 1999 9:35 AM
Subject: Re: [SQL] Counting the number of distinct rows returned


>Drew Whittle <drew@albatross.co.nz> writes:
>> How can I return the number of records (ie a count(user_id)) when using a
>> statement like this:
>
>> select distinct user_id from sales_by_region;
>
>count() with a GROUP BY will do what you want, I think --- see other
>thread with Doug Younger for an example.
>
>> I have tried things like:
>> select count(distinct user_id) from sales_by_region (parse error)
>
>Unfortunately we don't handle count(distinct ...) --- we should, since
>it's in SQL92.
>
> regards, tom lane
>
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