SELECT
    ITEM_CODE AS CODE
    , CASE
        WHEN I.ITEM_CODE = H.ITEM_CODE AND I.ITEM_NAME = H.ITEM_NAME
            THEN NULL
        ELSE I.ITEM_NAME
    END AS NAME
FROM
    ITEM I
    LEFT OUTER JOIN ITEM_HISTORY H USING(ITEM_CODE)
ORDER BY 1 DESC;