What is generalization in EER modeling, and can you provide examples?
Understand the Problem
The question is asking for an explanation or definition of the concept of generalization in Enhanced Entity-Relationship (EER) modeling, as well as examples illustrating this concept.
Answer
Generalization combines entities with shared attributes into a supertype.
Generalization in EER modeling is the process of combining common attributes of multiple entities into a higher-level entity, called a supertype. For example, the entities CAR and TRUCK can be generalized into a higher-level entity VEHICLE.
Answer for screen readers
Generalization in EER modeling is the process of combining common attributes of multiple entities into a higher-level entity, called a supertype. For example, the entities CAR and TRUCK can be generalized into a higher-level entity VEHICLE.
More Information
Generalization helps to simplify the data model by reducing redundancy and organizing the data into meaningful categories. It is essential for understanding hierarchical relationships in databases.
Tips
A common mistake is confusing generalization with specialization, as specialization divides a high-level entity into multiple lower-level subtypes.
Sources
- Generalization, Specialization and Aggregation in ER Model - geeksforgeeks.org
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