Prior to beginning this assignment, review Chapter 3: The Relational Database Model and Chapter 4: Entity Relationship (ER) Modeling from the course text and read Enhanced Entity-Relationship Model (Links to an external site.). A superclass is an entity type that has one or more distinct subgroups with unique attributes. The subgroups with unique attributes are defined as subclasses. There are several reasons for introducing superclass and subclasses into an ER model. First, incorporating a superclass and subclasses maintains the cleanliness of the structure and improves the conceptual flow. Second, it adds familiar semantic information to an ER diagram. For this interactive assignment,
Attach your ER diagram with your response in your initial post.
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