Re: Artificial Primary keys
Date: Mon, 28 Jan 2002 12:25:35 -0800
> >> Or could you give an example - that is: of a natural key that holds
> information, but is immutable? <<
With organ transplants and the like, I wonder what potential there is for mutability here.
A sample of a person's DNA taken from (what you think is) their liver might not be the same as the DNA taken from their blood 6 years earlier, if the liver has been changed for a new one.
-- Ben Clifford http://www.hawaga.org.uk/ben/ GPG: 30F06950 webcam: http://barbarella.hawaga.org.uk/benc-cgi/watchers.cgi Do not ever send e-mail to: philip_at_hawaga.org.uk (seriously!)Received on Mon Jan 28 2002 - 21:25:35 CET