The following lines contain the word 'select', 'insert', 'update' or 'delete':
select to_char(p_from_request_date, 'YYYY/MM/DD HH24:MI:SS'),
to_char(p_to_request_date, 'YYYY/MM/DD HH24:MI:SS'),
to_char(p_from_schedule_date, 'YYYY/MM/DD HH24:MI:SS'),
to_char(p_to_schedule_date, 'YYYY/MM/DD HH24:MI:SS')
into l_from_request_date,
l_to_request_date,
l_from_schedule_date,
l_to_schedule_date
from dual;