writing wehere clause in repository in springboot

import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.data.jpa.repository.Query;
import org.springframework.data.repository.query.Param;

public interface YourEntityRepository extends JpaRepository<YourEntity, Long> {

    @Query("SELECT e FROM YourEntity e WHERE e.someField = :someFieldValue")
    List<YourEntity> findBySomeField(@Param("someFieldValue") String someFieldValue);

}