+ ( SELECT AIR2.REQUIREMENT_ID FROM AMSTRUCK_INWARD_REQUIREMENT AIR2 LEFT JOIN AMSTRUCK_REQUIREMENT_PLAN ARP ON AIR2.REQUIREMENT_ID = ARP.REQUIREMENT_ID WHERE ARP.PLAN_ID IS NULL ) AIRP
+ LEFT JOIN AMSTRUCK_INWARD_REQUIREMENT AIR ON AIR.REQUIREMENT_ID = AIRP.REQUIREMENT_ID