Path: news.cambrium.nl!textnews.cambrium.nl!feeder1.cambriumusenet.nl!feed.tweaknews.nl!postnews.google.com!news1.google.com!npeer01.iad.highwinds-media.com!news.highwinds-media.com!feed-me.highwinds-media.com!post02.iad!news.aliant.net!not-for-mail Date: Sat, 09 Oct 2010 21:32:49 -0300 From: Bob Badour User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 (ax) X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.databases.theory Subject: Re: The Relational Model & Queries That Naturally Return Duplicate Rows References: <0d9300b0-88be-40f3-ae94-97d1beac56dd@j18g2000yqd.googlegroups.com> <03efca15-4020-4ea2-b0c3-cfb8723e713f@l20g2000yqm.googlegroups.com> <746c7840-b5cb-4a16-98ff-aa66c3def471@j25g2000yqa.googlegroups.com> <72885253-9078-4a7d-a7e6-256ca1af6357@j25g2000yqa.googlegroups.com> <19f86d37-9d8c-40a4-b9f5-60bdb706b81b@t3g2000vbb.googlegroups.com> In-Reply-To: <19f86d37-9d8c-40a4-b9f5-60bdb706b81b@t3g2000vbb.googlegroups.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Antivirus: avast! (VPS 101009-1, 10/09/2010), Outbound message X-Antivirus-Status: Clean Lines: 20 Message-ID: <4cb109a3$0$14818$9a566e8b@news.aliant.net> NNTP-Posting-Host: 142.68.99.35 X-Complaints-To: abuse@aliant.net Xref: news.cambrium.nl Erwin wrote: > On 10 okt, 00:14, Cimode wrote: > >>Getting an unintuitive point across to somebody who >>probably never read any significant RM theory material > > Hmmmmmmmm. Now I'm just being curious. > > How can you match this claim of yours with the fact that the OP > explicitly states in his question that > > "Since this is not a relation - because it contains duplicate rows - > ". > > Do you think there exists any source _BUT_ "significant RM theory > material" where he could have acquired the knowledge to state that ? You assume the text requires knowledge instead of copy/paste. I suspect he got the text from a test question.