Re: functional dependencies tht do not hold

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