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What is Entity-Relational Model?

Entity-Relationship (ER) Model is linked to the concept of real-world entities and relationships among them. 

The ER Model produces:
Entity set, 
Relationship set, 
General attributes, 

ER Model is being created on the basis of Entities and their attributes and Relationships among entities.

Entity: Entity in an ER Model is a real-world entity possessing properties known as attributes. Every attribute is distinct by its set of values known as domain.

Relationship: This is the logical association and relation among entities. 

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