create query for table t1 need to accept data only on working hours(MON-FRI and 9AM-6PM).


create or replace trigger trg_time
before insert or delete or update on t1
begin
if to_char(sysdate,'DAY')  in ('SATURDAY','SUNDAY') or to_char(sysdate,'HH24') not between '09' and '18'
then
raise_application_error(-20111,'Try in office working hours');
end if;
end;
/