SELECT
ORDERS_DTL.ITEM_CODE AS CODE, 
ITEM.ITEM_NAME AS NAME,
ORDERS_DTL.ORDER_QTY AS SUM_QTY
FROM ORDERS_DTL, ORDERS, ITEM, WAREHOUSE
WHERE 
WAREHOUSE.WH_CODE = 100
AND ORDERS.WH_CODE = WAREHOUSE.WH_CODE
GROUP BY 
ORDERS_DTL.ITEM_CODE
HAVING 
SUM(ORDERS_DTL.ORDER_QTY) >= 50
ORDER BY
ORDERS_DTL.ORDER_QTY DESC,
ORDERS_DTL.ITEM_CODE DESC