Re: BCNF and relational algebra

"Perception" <perceptionist2000_at_yahoo.com> wrote in message news:c1bcs9$89q$1_at_hercules.btinternet.com...
> "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?
> >
> >
>
> Thanks for the reply.
>
> To answer your question: the unary relation means that every date is
> associated with more than one value for every other attribute (that is,
Date
> only determines itself).

That tells me what Date determines, but it does not tell me what it means. Is every date for all time in the unary relation? What does it mean for a specific date if it is in the relation? What does it mean for a specific date if it is not in the relation? Received on Mon Feb 23 2004 - 01:24:28 CET