PER Employee Approved Leave History

select
papf.employee_number, 
papf.full_name requester_name,
pbg.name business_group,
paat.name leave_type, 
paa.date_start Leave_Start,
paa.date_end Leave_end,
paa.date_notification,
paa.creation_date approval_date,
psth.last_update_date ,
papf1.full_name approver_name
from
per_all_people_f papf,
per_business_groups pbg,
per_absence_attendances paa,
per_absence_attendance_types paat,
pqh_ss_transaction_history psth,
per_all_people_f papf1,
fnd_user fu,
pqh_ss_step_history pssh
where 1=1 and 
sysdate between papf.effective_start_date and papf.effective_end_date and
papf.business_group_id=pbg.business_group_id and
papf.person_id=paa.person_id and
paa.absence_attendance_type_id=paat.absence_attendance_type_id and
paat.date_end is null and
paa.absence_attendance_id=pssh.pk1 and
pssh.transaction_history_id=psth.transaction_history_id and
psth.process_name='HR_GENERIC_APPROVAL_PRC' and
fu.user_id=paa.created_by and
fu.employee_id=papf1.person_id and
trunc(sysdate) between papf1.effective_start_date and papf1.effective_end_date
order by 1,2,3,5