Purchase Requisition to Purchase Order Query

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
AND poh.segment1 = 'I-41174'
ORDER BY 2