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What is DBMS Generalization?

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Generalization is like a bottom-up approach in which two or more entities of lower level combine to form a higher level entity if they have some attributes in common.

In generalization, an entity of a higher level can also combine with the entities of the lower level to form a further higher level entity.

Generalization is more like subclass and superclass system, but the only difference is the approach. Generalization uses the bottom-up approach.

In generalization, entities are combined to form a more generalized entity, i.e., subclasses are combined to make a superclass.
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