https://docs.spring.io/spring-data/jpa/docs/current/reference/html/ Spring Data JPA - Reference Documentation Example 119. Using @Transactional at query methods @Transactional(readOnly = true) interface UserRepository extends JpaRepository { List findByLastname(String lastname); @Modifying @Transactional @Query("delete from User u where u.active = false") void del docs.spring.io 1. 공통 인터페이스 기능 1..