spring boot - how to write the JpaRepository for tables which has composite keys - Stack Overflow

Please refer attached screenshot to understand the table structure. Empd_Id is the primary key in 'Employee' table which in turn becomes as a part of composite key along with 'product_id' in table

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Modeling a child parent relationship in the same table using JPA + Spring Boot and representing it as a JSON tree structure., by Malkeith Singh

Spring Boot JpaRepository with Example - GeeksforGeeks

java - Spring Data JPA - create @Composite key for the three tables - Stack Overflow