PO's Without Requesition Query

SELECT prh.segment1 "PR NUM"
,TRUNC (prh.creation_date) "CREATED ON"
,TRUNC (prl.creation_date) "Line Creation Date"
,prl.line_num "Seq #"
,msi.segment1 "Item Num"
,prl.item_description "Description"
,prl.quantity "Qty"
,TRUNC (prl.need_by_date) "Required By"
,ppf1.full_name "REQUESTOR"
,ppf2.agent_name "BUYER"

FROM po.po_requisition_headers_all prh
,po.po_requisition_lines_all prl
,apps.per_people_f ppf1
, (SELECT DISTINCT agent_id
,agent_name
FROM apps.po_agents_v) ppf2
,po.po_req_distributions_all prd
,inv.mtl_system_items_b msi
,po.po_line_locations_all pll
,po.po_lines_all pl
,po.po_headers_all ph

WHERE prh.requisition_header_id = prl.requisition_header_id
AND prl.requisition_line_id = prd.requisition_line_id
AND ppf1.person_id = prh.preparer_id
AND prh.creation_date BETWEEN ppf1.effective_start_date
AND ppf1.effective_end_date
AND ppf2.agent_id(+) = msi.buyer_id
AND msi.inventory_item_id = prl.item_id
AND msi.organization_id = prl.destination_organization_id
AND pll.line_location_id(+) = prl.line_location_id
AND pll.po_header_id = ph.po_header_id(+)
AND pll.po_line_id = pl.po_line_id(+)
AND prh.authorization_status = 'APPROVED'
AND pll.line_location_id IS NULL
AND prl.closed_code IS NULL
AND NVL (prl.cancel_flag, 'N') <> 'Y'
ORDER BY 1, 2