Path: dp-news.maxwell.syr.edu!spool.maxwell.syr.edu!drn.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed.icl.net!newsfeed.fjserv.net!syros.belnet.be!news.belnet.be!hq-usenetpeers.eweka.nl!68.142.88.75.MISMATCH!hwmnpeer01.ams!nntp.telenet.be!kwabbernoot.telenet-ops.be!phobos.telenet-ops.be.POSTED!not-for-mail From: Jan Hidders User-Agent: Mozilla Thunderbird 0.8 (X11/20040923) X-Accept-Language: en-us, en MIME-Version: 1.0 Newsgroups: comp.databases.theory Subject: Re: Base Normal Form References: <1120703075.535108.140280@o13g2000cwo.googlegroups.com> <1120768247.546278.21990@z14g2000cwz.googlegroups.com> In-Reply-To: <1120768247.546278.21990@z14g2000cwz.googlegroups.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Lines: 19 Message-ID: Date: Thu, 07 Jul 2005 21:14:26 GMT NNTP-Posting-Host: 81.165.226.147 X-Complaints-To: abuse@telenet.be X-Trace: phobos.telenet-ops.be 1120770866 81.165.226.147 (Thu, 07 Jul 2005 23:14:26 MEST) NNTP-Posting-Date: Thu, 07 Jul 2005 23:14:26 MEST Organization: Telenet Internet Xref: dp-news.maxwell.syr.edu comp.databases.theory:32097 dawn wrote: > Jan Hidders wrote: >>It's really not a good idea to confuse the concept of >>relation and function. > > I definitely agree! And yet that seems to be the consequence of what you are proposing. I could be wrong but I interpreted your suggestion as that every relation with a candidate key is a function. Since every relation has at least one candidate key that means that every relation is a function according to you. And yet, at the same time, you say: > A function is a specific type of relation where a > relation might not be a function at all. So you seem to be contradicting yourself. -- Jan Hidders