We can use the union operation in Hibernate 6 to unify results from two related database entities. There are also a few other ways, depending on our circumstances.

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Hibernate 6 introduces native support for SQL union operations to combine results from multiple entities. The tutorial demonstrates implementing union queries using JPQL, CriteriaBuilder API, and database views, along with alternative approaches like manual result merging in memory. Key considerations include performance trade-offs, pagination challenges, and proper DTO mapping for unified results.

Implementing Unions in Hibernate

4. Simulating the Union Statement in Memory