SELECT
	T1.ITEM_CODE AS CODE
	,CASE
		WHEN T1.ITEM_NAME = T2.ITEM_NAME THEN 'NULL'
		ELSE T1.ITEM_NAME
	END AS NAME
FROM ITEM T1
LEFT OUTER JOIN ITEM_HISTORY T2
ON T1.ITEM_CODE = T2.ITEM_CODE
ORDER BY
	T1.ITEM_CODE DESC