From: Ian Barwick <barwick@gmx.net>
To: cgg007@yahoo.com
To: pgsql-sql@postgresql.org
Subject: Re: Elegant SQL solution:
Date: Sun, 8 Jun 2003 13:54:17 +0200
Message-ID: <200306081354.17591.barwick@gmx.net> (raw)
In-Reply-To: <20030606162635.97132.qmail@web13807.mail.yahoo.com>
References: <20030606162635.97132.qmail@web13807.mail.yahoo.com>
On Friday 06 June 2003 18:26, Chris Gamache wrote:
> I could create a one-column table with values 1 - 12 in it, and select from
> that table with a where clause matching "month". I could also create a view
> "SELECT 1 UNION SELECT 2 UNION ..." and select against the view. There MUST
> be a more elegant way to do this.
You probably need a pivot table (the one-column table with values 1 - 12).
Oracle Magazine had a useful article on this subject (relevant for none-Oracle
SQL too) a while back:
http://otn.oracle.com/oramag/oracle/02-sep/o52sql.html
(registration probably required).
Of course you could also use a set returning function a la:
CREATE OR REPLACE FUNCTION months() RETURNS SETOF INT AS '
BEGIN
FOR i IN 1..12 LOOP
RETURN NEXT i;
END LOOP;
RETURN;
END;' LANGUAGE 'plpgsql';
Ian Barwick
barwick@gmx.net
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To: pgsql-sql@postgresql.org
Cc: barwick@gmx.net, cgg007@yahoo.com
Subject: Re: Elegant SQL solution:
In-Reply-To: <200306081354.17591.barwick@gmx.net>
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