Re: Is relational theory irrelevant? (was Re: Dreaming About Redesigning SQL)
Date: Wed, 12 Nov 2003 17:46:38 -0800
Message-ID: <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. Received on Thu Nov 13 2003 - 02:46:38 CET