Link Purchase Order and Requisition

SELECT prh.segment1 req_number
,prh.authorization_status
,prl.line_num req_line_num
,prl.item_description req_item_description
,prl.unit_price req_unit_price
,prl.quantity req_quantity
,pd.req_header_reference_num
,pd.req_line_reference_num
,pl.line_num
,pl.item_description
,pl.quantity
,pl.amount
,ph.segment1 po_number
,prd.distribution_id
,pd.req_distribution_id
FROM po_requisition_headers_all prh
,po_requisition_lines_all prl
,po_req_distributions_all prd
,po_distributions_all pd
,po_line_locations_all pll
,po_lines_all pl
,po_headers_all ph
WHERE prh.requisition_header_id = prl.requisition_header_id
and prh.org_id = prl.org_id
and prl.requisition_line_id = prd.requisition_line_id
and prl.org_id = prd.org_id
and prd.distribution_id = pd.req_distribution_id(+)
and prd.org_id = pd.org_id(+)
and pd.line_location_id = pll.line_location_id(+)
and pd.org_id = pll.org_id(+)
and pll.po_line_id = pl.po_line_id(+)
and pll.org_id = pl.org_id(+)
and pl.po_header_id = ph.po_header_id(+)
and pl.org_id = ph.org_id(+);