Interactions between dependencies and nested relational structures
Journal of Computer and System Sciences
Partition semantics for relations
Journal of Computer and System Sciences
On the equivalence of an Egd to a set of Fd's
Journal of the ACM (JACM)
On the representation of dependencies by propositional logic
MFDBS 91 Proceedings of the 3rd symposium on Mathematical fundamentals of database and knowledge base systems
The number of keys in relational and nested relational databases
Discrete Applied Mathematics - Special issue on combinatorial problems in databases
A consideration on normal form of not-necessarily-normalized relation in the relational data model
VLDB '77 Proceedings of the third international conference on Very large data bases - Volume 3
Hi-index | 0.98 |
A combinatorial, data-oriented approach is suggested to study generalized relational databases (GRDs) and generalized functional dependencies (GFDs). GRDs, as defined here, extend the traditional relational model by Codd. Also, certain aspects of nonfirst-normal-form databases and databases with null values can be captured in the setting of GRDs. We show that, after a suitable transformation, GFDs can be described in the framework of traditional functional dependencies (FDs). This leads to a convenient description of GFDs in terms of propositional logic.