Re: functional dependencies tht do not hold

Jan Hidders wrote:
> Nabil wrote:
> > hey,
> > i have been studying databases for a while now . There exist some
> > cases where it is usefull to store even those FD's that do not hold.
> > Ofcourse we save these as not holding and do not use them while
> > normalizing. Does ne1 know when it is helpfull to store fd's that do
> > not hold??
>
> Sure, but this sounds a bit like a home-work problem, so could you tell
> a bit more about why you want to know this?
>
> -- Jan Hidders

I am working as a Research assistant in my university and i was asked to find out if there are such cases. I have searched on google but for no use. I have not found such a case. I personally think there is no use of storing fd's that do not hold. a functional dependency is defined as such that if it does not hold it has no meaning. will be waiting for ur reply. if there is such a case then let me know. will be waiting for ur reply. Received on Thu Jun 02 2005 - 01:00:25 CDT