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Compare ER and EER models

written 9.0 years ago by meghalikalyankar • 2.3k

modified 4.0 years ago by binitamayekar ★ 6.7k

database management systems

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written 9.0 years ago by meghalikalyankar • 2.3k

ER Model	EER Model
ER Model stands for Entity Relationship model.	EER Model stands for Extended Entity relationship model.
ER Model consists of set of entities and relationship among these entities	EER Model is used to represent a collection of objects i.e union of objects of different entity types.
In ER schema the resulting schema diagrams are called ER diagrams	In EER schema the resulting schema diagrams are called EER diagrams
The concept of specialization and generalization is absent.	It includes the concept of specialization and generalization.
ER Model is the basic model.	EER Model includes all the modelling concept of ER model along with features such as subclass and superclass, Specialization and Generalization, Union and category, Aggregate,etc..

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