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