Received: from firewall2.hants.gov.uk (gatekeeper2.hants.gov.uk
	[195.166.69.31])
	by mail.postgresql.org (8.11.1/8.11.1) with ESMTP id eBCFgqm88752
	for <pgsql-docs@postgresql.org>; Tue, 12 Dec 2000 10:42:53 -0500 (EST)
	(envelope-from itdcgb@its.hants.gov.uk)
Received: from [172.16.1.19] (helo=hants.gov.uk)
	by firewall2.hants.gov.uk with esmtp (Exim 3.15 #1)
	id 145ra8-0006BH-00
	for pgsql-docs@postgresql.org; Tue, 12 Dec 2000 15:43:08 +0000
Received: from [172.16.1.212] (HELO mailbox.hants.gov.uk)
	by hants.gov.uk (CommuniGate Pro SMTP 3.3.1)
	with ESMTP id 1539446 for pgsql-docs@postgresql.org;
	Tue, 12 Dec 2000 15:43:08 +0000
X-WebMail-UserID: itdcgb@its.hants.gov.uk
Date: Tue, 12 Dec 2000 15:33:28 +0000
From: itdcgb <itdcgb@its.hants.gov.uk>
To: pgsql-docs@postgresql.org
X-EXP32-SerialNo: 00002674
Subject: Tutorial: chapter 5
Message-ID: <3A25384D@mailbox.hants.gov.uk>
Mime-Version: 1.0
Content-Type: text/plain; charset="ISO-8859-1"
Content-Transfer-Encoding: 7bit
X-Mailer: WebMail (Hydra) SMTP v3.61
X-Archive-Number: 200012/30
X-Sequence-Number: 77

In 'Joins between classes' in Section 5 of the tutorial we have, in
the first paragraph:

    As an example, say we wish to find all the records that
    are in the  temperature  range  of  other records. In
    effect, we need to compare the temp_lo and temp_hi
    attributes of each EMP instance to the temp_lo and
    temp_hi  attributes of all other EMP instances.

I believe that EMP should read WEATHER, as the example query that
follows joins WEATHER to itself.

EMP is often used in Oracle examples.

Regards,
Graham