Master Hibernate and JPA with Spring Boot in 100 Steps - Step 46 - JPA Inheritance Hierarchies and Mappings - Table Per

The video tutorial explains the table per class inheritance strategy in JPA, where each concrete subclass has its own table. It highlights that while this approach simplifies data insertion and retrieval, it leads to data redundancy as common columns are repeated across tables. The tutorial also demonstrates how data is retrieved using a union of tables and discusses the pros and cons of this strategy, including performance benefits and potential issues with having multiple tables for subclasses.

Explain how the retrieval of employee details is performed using a union in this inheritance strategy.

What are the advantages and disadvantages of using the 'table per class' inheritance strategy in JPA?