From: Richard Huxton <dev@archonet.com>
To: Giannis <ogiannhs@yahoo.gr>
To: pgsql-sql@postgresql.org
Subject: Re: SQL -select count-
Date: Tue, 26 Nov 2002 15:36:58 +0000
Message-ID: <200211261536.58303.dev@archonet.com> (raw)
In-Reply-To: <00cf01c28fee$144d8bd0$dd4186c3@edunet.uoa.gr>
References: <00cf01c28fee$144d8bd0$dd4186c3@edunet.uoa.gr>
On Tuesday 19 Nov 2002 5:06 pm, Giannis wrote:
> when I do :
>
> select count(column_name) from table_name
>
> should I get the count for all columns or just those which are not null?
Just "not null" - use count(*) or count(0) for a count of rows.
--
Richard Huxton
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To: pgsql-sql@postgresql.org
Cc: dev@archonet.com, ogiannhs@yahoo.gr
Subject: Re: SQL -select count-
In-Reply-To: <200211261536.58303.dev@archonet.com>
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