Database Management System20825 marksExtended ER model constraints
Discuss the various types of constraints used on Extended ER Model.
Discuss the various types of constraints used on Extended ER Model. [5]
The Extended Entity-Relationship (EER) model adds additional semantic concepts to the basic ER model. Among the most important additions are constraints on specialization and generalization, which control how entities participate in subclass/superclass relationships. --- This constraint specifies...