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