Kai Meinhard

For any given database table there is a set of common queries that could be implemented by default. Spring does that with [`CrudRepository`](https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#repositories.core-concepts) and [`JpaRepository`](https://docs.spring.io/spring-data/jpa/docs/current/reference/html/#jpa.query-methods). This makes it a lot...