Approved Supplier List Query in Oracle Apps

SELECT hou.NAME operating_unit, asl.vendor_business_type,
       pov.segment1 vendor_code, pov.vendor_name, sites.vendor_site_code,
       msi.segment1 item_code, msi.description item_desc,
       using_organization_id, owning_organization_id,plc.displayed_field , past.status Supplier_Status
  FROM po_approved_supplier_list asl,
       po_vendors pov,
       po_vendor_sites_all sites,
       mtl_system_items_b msi,
       hr_operating_units hou,
       po_lookup_codes plc,
       po_asl_statuses past
 WHERE asl.vendor_id = pov.vendor_id
   AND asl.vendor_site_id = sites.vendor_site_id
   AND msi.inventory_item_id = asl.item_id
   AND msi.organization_id = asl.using_organization_id
   AND sites.org_id = hou.organization_id
   and asl.vendor_business_type = plc.lookup_code
   AND asl.asl_status_id = past.status_id
   AND plc.lookup_type = 'ASL_VENDOR_BUSINESS_TYPE'
   and past.status='Approved';