Principles of database and knowledge-base systems, Vol. I
Principles of database and knowledge-base systems, Vol. I
The structure of the relational database model
The structure of the relational database model
Covers for functional independencies
MFDBS 89 Proceedings of the second symposium on Mathematical fundamentals of database systems
The design of relational databases
The design of relational databases
Complete rules for n-ary relationship cardinality constraints
Data & Knowledge Engineering
Entity-Relationship Modeling: Foundations of Database Technology
Entity-Relationship Modeling: Foundations of Database Technology
Cardinality Constraints for n-ary Relationship Types
ADBIS '99 Proceedings of the Third East European Conference on Advances in Databases and Information Systems
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The aim of this paper is to propose a uniform terminology for functional dependencies and their counterparts for n-ary relationship types. A variety of existing approaches is presented and the differences between them are discussed. A sound and complete axiomatization is introduced that allows one to check the consistency of a cardinality constraint specification and to derive new constraints from existing ones. The advantage of our system of rules is its applicability to the whole variety of existing approaches in this area. Our deductive system is nonredundant.