SELECT
    A.ITEM_CODE AS CODE
  , CASE WHEN A.ITEM_NAME = B.ITEM_NAME
         THEN NULL
         ELSE A.ITEM_NAME
    END AS NAME
FROM
    ITEM AS A
    LEFT JOIN ITEM_HISTORY AS B
    ON A.ITEM_CODE = B.ITEM_CODE
ORDER BY
    A.ITEM_CODE DESC;