Re: BCNF and relational algebra
Date: Mon, 23 Feb 2004 18:50:42 +0000 (UTC)
Message-ID: <c1di22$no2$1_at_sparta.btinternet.com>
"mAsterdam" <mAsterdam_at_vrijdag.org> wrote in message
news:403950a7$0$562$e4fe514c_at_news.xs4all.nl...
> Hi,
> I am completely new to this group, but I'll give it a try.
> Perception wrote:
> > "Bob Badour" <bbadour_at_golden.net> wrote in message
> > news:NY2dnV0uDtJmkKTdRVn-uw_at_golden.net...
> >
> >>What do you suppose the unary relation of dates means?
> >>
> >>
> > ...
> > A:Patient Identifier -> Patient Name, Ward
> > B:Date
> > C:Doctor -> Clinic
>
> Start with providing the predicates which
> would let the population data convey true propositions.
Could you please elaborate on what you mean by true propositions?
> Example:
> A:
> A:Patient Identifier -> Patient Name, Ward
> ------------------ ------------ ----
> 1 Johnson IC
> 2 Perception RE
>
> What do these rows *mean* ?
> That should give a clue to the predicate for A.
Received on Mon Feb 23 2004 - 19:50:42 CET