Requisition moved from different stages till converting into PR

SELECT DISTINCT
,u.description "Requestor"
,porh.segment1 as "Req Number"
,trunc(porh.Creation_Date) "Created On"
,pord.LAST_UPDATED_BY
,porh.Authorization_Status "Status"
,porh.Description "Description"
,poh.segment1 "PO Number"
,trunc(poh.Creation_date) "PO Creation Date"
,poh.AUTHORIZATION_STATUS "PO Status"
,trunc(poh.Approved_Date) "Approved Date"
FROM
,apps.po_headers_all poh
,apps.po_distributions_all pod
,apps.po_req_distributions_all pord
,apps.po_requisition_lines_all porl
,apps.po_requisition_headers_all porh
,apps.fnd_user u
WHERE
porh.requisition_header_id = porl.requisition_header_id and porl.requisition_line_id = pord.requisition_line_id and
pord.distribution_id = pod.req_distribution_id(+) and
pod.po_header_id = poh.po_header_id(+) and
porh.created_by = u.user_id
order by 2