SELECT 
    ORDERS_DTL.ITEM_CODE,
    ITEM.ITEM_NAME,
    SUM(ORDERS_DTL.ORDER_QTY)
FROM
    ORDERS_DTL
LEFT OUTER JOIN
    ITEM
ON
    ITEM.ITEM_CODE = ORDERS_DTL.ITEM_CODE
GROUP BY
    ITEM.ITEM_CODE
ORDER BY
    SUM(ORDERS_DTL.ORDER_QTY) DESC,
    ITEM.ITEM_CODE DESC;