OTL Timekeeper Group, Timekeeper and Employees

select timekeepr_Group_Name,timekeeper_name ,Timekeeper_corporation_number timekeeper_tgi, Employee_Name ,employee_corporation_Number employee_tgi,a.name org_name
 from (select employee_number,npw_number,full_name,paaf.organization_id,haou.name
from per_all_people_f papf,per_all_assignments_f paaf,hr_all_organization_units haou
where paaf.person_id=papf.person_id
and sysdate between paaf.effective_start_date and paaf.effective_end_date
and sysdate between papf.effective_start_date and papf.effective_end_date
and current_employee_flag='Y'
and haou.organization_id=paaf.organization_id
and  paaf.organization_id in
(SELECT
org.organization_id
FROM
hr_all_organization_units org,
per_org_structure_elements pose
WHERE 1=1
AND org.organization_id = pose.organization_id_child
START WITH
pose.organization_id_parent =:p_org_id
CONNECT BY PRIOR
pose.organization_id_child = pose.organization_id_parent
))a,
(select tg.TK_GROUP_NAME timekeepr_Group_Name,papf2.full_name timekeeper_name ,papf2.employee_Number Timekeeper_corporation_number,
papf1.employee_Number employee_corporation_Number,papf1.full_name Employee_Name
from hxc_tk_groups tg,hxc_tk_group_queries tkgq,hxc_tk_group_query_criteria tc,per_all_people_f papf1,per_all_people_f papf2,
hxt_rotation_plans hrp
where tg.tk_group_id=tkgq.tk_group_id
and tc.TK_GROUP_QUERY_ID=tkgq.TK_GROUP_QUERY_ID
and tc.CRITERIA_ID=papf1.person_id
and tg.TK_RESOURCE_ID=papf2.person_id
and hrp.name(+)=papf1.employee_number
and sysdate between papf1.effective_start_date and papf1.effective_end_date
and sysdate between papf2.effective_start_date and papf2.effective_end_date)b
where nvl(a.employee_number,a.npw_number)=b.employee_corporation_Number
order by 1,3,4