Advanced Database20815 marksConstraints and characteristics of specialization and Genera
Explain different constraints of specialization and generalization.
Explain different constraints of specialization and generalization. [5]
Specialization and Generalization are key concepts in the Enhanced Entity-Relationship (EER) model. There are two main constraints that apply to both specialization and generalization: --- This constraint specifies whether every entity in the superclass must participate as a member of at least on...