What happens to the IDs after generalizing the Player and Staff entities by the Person entity?

When generalizing the Player and Staff entities by creating a Person entity, each of the original entities—Player and Staff—will maintain their own unique identities within the context of the application. Upon generalization, the ID for each entity does not merge or share an ID series with the other entities; instead, they continue to use their independently generated IDs, which means they preserve their own sets and sequences.

This design allows for distinct identification of objects, even after they have been related through a generalization relationship. For example, a Player may have a different ID than a Staff member, making it easy to reference and manage each type of entity without confusion or overlap, which enhances database integrity and data retrieval efficiency.

The notion of resetting IDs or merging them into a single sequence would compromise this distinct identification and could lead to conflicts or data inconsistencies, which is generally avoided in entity modeling practices. Thus, maintaining separate ID sequences is essential for the integrity of the data model after generalization.