Re: what are keys and surrogates?
Date: Mon, 28 Jan 2008 16:05:46 GMT
Message-ID: <u3nnj.1$4f.0_at_trndny08>
"Bob Badour" <bbadour_at_pei.sympatico.ca> wrote in message
news:479deace$0$4050$9a566e8b_at_news.aliant.net...
> David Cressey wrote:
>
> > "Bob Badour" <bbadour_at_pei.sympatico.ca> wrote in message
> > news:479d16f3$0$4055$9a566e8b_at_news.aliant.net...
> >
> >>Logical representations are representations to users. Physical
> >>representations are representations to the machine.
> >
> > The trouble with this definition is that the user of a machine is
frequently
> > another machine.
> > For example, the "user" of a database is frequently an application
program.
> > That application program is a machine. It has users.
>
> I fail to see a point in what you wrote.
Why am I not surprised? Received on Mon Jan 28 2008 - 17:05:46 CET