In implementing a database schema, each supertype and subtype entity must be implemented with a separate table.

Name: In implementing a database schema, each supertype and subtype entity must be implemented with a separate table.
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In a database schema, a supertype and its subtypes can be implemented using a single table with a discriminator column to differentiate between the subtypes, or with separate tables for each subtype, depending on the design approach.

In Implementing a Database Schema, Each Supertype and Subtype Entity