Received: from candle.pha.pa.us (candle.navpoint.com [162.33.245.46]) by mail.postgresql.org (8.11.1/8.11.1) with ESMTP id eBCGlfm03368 for ; Tue, 12 Dec 2000 11:47:41 -0500 (EST) (envelope-from pgman@candle.pha.pa.us) Received: (from pgman@localhost) by candle.pha.pa.us (8.9.0/8.9.0) id LAA12907; Tue, 12 Dec 2000 11:47:51 -0500 (EST) From: Bruce Momjian Message-Id: <200012121647.LAA12907@candle.pha.pa.us> Subject: Re: Tutorial: chapter 5 In-Reply-To: <3A25384D@mailbox.hants.gov.uk> "from itdcgb at Dec 12, 2000 03:33:28 pm" To: itdcgb Date: Tue, 12 Dec 2000 11:47:51 -0500 (EST) CC: pgsql-docs@postgresql.org X-Mailer: ELM [version 2.4ME+ PL77 (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII X-Archive-Number: 200012/32 X-Sequence-Number: 79 Applied. Thanks. [ Charset ISO-8859-1 unsupported, converting... ] > 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 > > -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 853-3000 + If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania 19026