SELECT 
    ITM.ITEM_CODE as CODE,
    CASE 
        WHEN ITM.ITEM_NAME == HIS.ITEM_NAME THEN NULL
        ELSE ITM.ITEM_NAME
    END
    as NAME
FROM ITEM ITM
LEFT JOIN ITEM_HISTORY HIS
ON ITM.ITEM_CODE = HIS.ITEM_CODE


ORDER BY ITM.ITEM_CODE DESC