Re: Character string relation and functional dependencies

On 7 dec, 01:24, Tegiri Nenashi <TegiriNena..._at_gmail.com> wrote:
> On Dec 6, 2:38 pm, Jonathan Leffler <jleff..._at_earthlink.net> wrote:
>
> > Tegiri Nenashi wrote:
> > > On Dec 6, 9:40 am, rp..._at_pcwin518.campus.tue.nl (rpost) wrote:
> > >> Another difference is that database tables are finite and variable,
>
> > > Oh, relations in database world are certainly not restricted by finite
> > > cardinality.
>
> > I thought that computers are finite, so the relations containable in
> > them are too - even if damn large. There's a big difference between
> > very large and infinite.
>
> This doesn't really matter. You can still reason about infinite
> relations with finite resources available on you computer platform.

Indeed you can. In case anyone is interested in a concrete example:

http://cse.unl.edu/~revesz/cdb/index.htm

• Jan Hidders