From: Bruno Wolff III <bruno@wolff.to>
To: Terry Brick <terry_brick2000@yahoo.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Formatting Functions and Group By
Date: Tue, 13 Apr 2004 11:45:18 -0500
Message-ID: <20040413164518.GA18956@wolff.to> (raw)
In-Reply-To: <20040413161305.22857.qmail@web11502.mail.yahoo.com>
References: <20040413161305.22857.qmail@web11502.mail.yahoo.com>
On Tue, Apr 13, 2004 at 09:13:05 -0700,
Terry Brick <terry_brick2000@yahoo.com> wrote:
> Hi,
> I'm porting a bunch of queries from MySQL to Postgres 7.4 and am having a problem with one
> particular area. For example, a query like this works in MySQL:
>
> select
> to_char(myCol,'Mon YY')
> from
> myTable
> group by
> to_char(myCol,'MM YYYY')
> order by
> to_char(myCol,'MM YYYY')
>
> Postgres will give me an error saying that "to_char(myCol,'Mon YY')" must be in the 'group by'. I
> understand why that normally needs to be the case, but in theory, it would be ok here because they
> are actually the same values (in the select and group by) but just formatted differently. I just
> want the query to be grouped and ordered by month and year, but to be formatted differently in the
> output.
>
> Any ideas?
You could do something like the following. It works in 7.4, but I am not
sure if it is completely standard.
area=> select to_char(date_trunc('month',current_date), 'MM YYYY')
area-> group by date_trunc('month',current_date);
to_char
---------
04 2004
(1 row)
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To: pgsql-sql@postgresql.org
Cc: bruno@wolff.to, terry_brick2000@yahoo.com
Subject: Re: Formatting Functions and Group By
In-Reply-To: <20040413164518.GA18956@wolff.to>
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