Question

What is entity relationship model ?

Answer 1

Entity Relationship Modeling (ER Modeling) is a graphical approach to database design. It uses Entity/Relationship to represent real world objects. An Entity is a thing or object in real world that is distinguishable from surrounding environment.

Answer 2

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An entity–relationship model describes interrelated things of interest in a specific domain of knowledge. A basic ER model is composed of entity types and specifies relationships that can exist between entities. 

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