declare
	query1 recordgroup;
	query_studentid number;
begin
  	query1:=create_group_from_query('student_id','select student_id from student');
  	query_studentid:=populate_group(query1);
  	if query_studentid<>0 then
  		raise form_trigger_failure;
  		else
		clear_list('student_detail_upd.student_id');
		POPULATE_LIST('student_detail_upd.student_id',query1);
		end if;
	end;