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DBMS Generalization

DBMS Generalization with DBMS Overview, DBMS vs Files System, DBMS Architecture, Three schema Architecture, DBMS Language, DBMS Keys, DBMS Generalization, DBMS Specialization, Relational Model concept, SQL Introduction, Advantage of SQL, DBMS Normalization, Functional Dependency, DBMS Schedule, Concurrency Control etc.

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Generalization

  • 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.

For example, Faculty and Student entities can be generalized and create a higher level entity Person.


DBMS Generalization
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