Kuidas koostada SQL-päring Spring Data JPA hoidlate integreerimiseks?

In Spring Data JPA, to integrate SQL queries with repositories, you can use the @Query annotation. It allows you to write native SQL or JPQL queries directly in the repository interface.

Example with a native SQL query:

public interface UserRepository extends JpaRepository<User, Long> {
    @Query(value = "SELECT * FROM users WHERE status = ?1", nativeQuery = true)
    List<User> findByStatus(String status);
}

Example with a JPQL query:

public interface UserRepository extends JpaRepository<User, Long> {
    @Query("SELECT u FROM User u WHERE u.status = ?1")
    List<User> findByStatus(String status);
}

This way, the SQL query is formulated inside the @Query annotation, and Spring Data JPA automatically integrates it with the repository and executes it when the method is called.