Received: from davinci.ethosmedia.com (davinci.ethosmedia.com [209.10.40.250])
	by postgresql.org (Postfix) with ESMTP id 2659D474E42
	for <pgsql-sql@postgresql.org>; Tue, 16 Jul 2002 14:03:38 -0400 (EDT)
Received: from [66.219.92.2] (HELO chocolate-mousse)
	by davinci.ethosmedia.com (CommuniGate Pro SMTP 3.5.9)
	with ESMTP id 1579004; Tue, 16 Jul 2002 11:03:36 -0700
Content-Type: text/plain;
  charset="iso-8859-1"
From: Josh Berkus <josh@agliodbs.com>
Reply-To: josh@agliodbs.com
Organization: Aglio Database Solutions
To: Devrim GUNDUZ <devrim@oper.metu.edu.tr>,
	PostgreSQL Mailing Lists-SQL <pgsql-sql@postgresql.org>
Subject: Re: A SQL Training
Date: Tue, 16 Jul 2002 11:07:22 -0700
X-Mailer: KMail [version 1.4]
References: <Pine.LNX.4.44.0207161957450.30332-100000@oper.metu.edu.tr>
In-Reply-To: <Pine.LNX.4.44.0207161957450.30332-100000@oper.metu.edu.tr>
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Message-Id: <200207161107.22547.josh@agliodbs.com>
X-Archive-Number: 200207/243
X-Sequence-Number: 8621


Devrim,

> Today, one of my teacher asked me a question for a practice... I could no=
t=20
> solve it :)
>=20
> Here it comes:
>=20
> We are given the name of the grandfather in a family. Let's call him A. A=
=20
> has n sons, each son has children .
etc.

In a month or so, I will be posting an article on advanced tree structure=
=20
(based on Joe Celko's work) in PostgreSQL.

Until then, buy a copy of SQL for Smarties, 2nd ed. by Joe Celko.  He has t=
wo=20
chapters on tree structure.

--=20
-Josh Berkus
 Aglio Database Solutions
 San Francisco