Re: count( distinct x )

From: Jose Rodrigo Fernandez Menegazzo <rocket(at)datascan-site(dot)com>
To: lists(at)a1(dot)org(dot)uk
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: count( distinct x )
Date: 2000-11-27 18:08:06
Message-ID: 1092.192.168.0.9.975348486.squirrel@mail.datascan-site.com
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> The problem I have is with this statement:
>
> select count( distinct area ) from areapostcode where postcode like
> 'BS1%'
>
> the above statement fails with
> ERROR: parser: parse error at or near "distinct"
>
> I am not the greatest when it comes to SQL, but the pgsql docs implied
> that the above would work.
>
> What I am trying to do is get a count of the no of matches from the
> statement below
> select distinct area from areapostcode where postcode like 'BS1%'
>
> Not the count of:
> select area from areapostcode where postcode like 'BS1%'
>

I don't have where to try it, but have you tried:

select distinct count(area) from areapostcode where postcode like 'BS1%'

Rodrigo F.

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