Oracle FAQ | Your Portal to the Oracle Knowledge Grid |
Home -> Community -> Usenet -> comp.databases.theory -> 3NF but not BCNF
I am presented with the following question:
Argue that if a relation schema R is in Third Normal Form but not in Boyce-Codd
Normal Form with respect to a set of functional dependencies F, then it must have
at least two distinct keys for R with respect to F which overlap, i.e. such that their
intersection is nonempty.
Unfortunately, my textbook only mentions this point in passing, referring to some paper by Vincent and Srinivasan. This paper does not appear to be available online, however.
Any explanation would be greatly appreciated. Received on Tue May 15 2001 - 05:09:41 CDT