Re: Is relational theory irrelevant? (was Re: Dreaming About Redesigning SQL)
Date: Thu, 13 Nov 2003 08:19:41 -0500
Message-ID: <rtOdnazHN9yPGC6iRVn-hg_at_golden.net>
"Mikito Harakiri" <mikharakiri_at_iahu.com> wrote in message
news:DxBsb.30$1n1.179_at_news.oracle.com...
> "Bob Badour" <bbadour_at_golden.net> wrote in message
> news:COydnd-jwepVXC-iRVn-hQ_at_golden.net...
> > "Marshall Spight" <mspight_at_dnai.com> wrote in message
> > news:Vftsb.179962$HS4.1498393_at_attbi_s01...
> > > "Bob Badour" <bbadour_at_golden.net> wrote in message
> > news:VaWdndbrNqgr0y-iRVn-jg_at_golden.net...
> > > >
> > > > Relations have no order. The values in relations have order. An
> ordered
> > > > structure, like an array for instance, involves physical order.
> > >
> > > Why? Why can't you have logical order?
> >
> > Ordered domains do have logical order. Relations have no order, but the
> > values in the relations have order.
>
> That totally depends whom you ask, of course. A person with mathematical
> background would have no trouble defining an order relation among the
tuples
> of the original relation induced by the order defined on each domain
> associated with individual column.
As I said above, ordered domains do have logical order. Received on Thu Nov 13 2003 - 14:19:41 CET