@Query(value="UPDATE student_results SET external_marks = null FROM exam, students WHERE student_results.exam_cycle_id = exam.exam_cycle_id AND student_results.student_id = students.id AND exam.exam_cycle_id = :examCycleId AND students.institute_id = :instituteId",nativeQuery=true)
@Query("UPDATE StudentResult sr SET sr.externalMarks = null, sr.passingExternalMarks = null, sr.externalMarksObtained = null WHERE sr.examCycle_name = :examCycleName AND sr.instituteId = :instituteId")