Functional Dependencies Constraints on the set of legal relations. Require that the value for a certain set of attributes determines uniquely the value for another set of attributes. A functional dependency is a generalization of the notion of a key. Database System Concepts-6th Edition 8.11 @Silberschatz,Korth and SudarshanDatabase System Concepts - 6 8.11 ©Silberschatz, Korth and Sudarshan th Edition Functional Dependencies Constraints on the set of legal relations. Require that the value for a certain set of attributes determines uniquely the value for another set of attributes. A functional dependency is a generalization of the notion of a key