select
    ORDERS_DTL.ITEM_CODE as CODE
    ,
    case
        when ITEM.ITEM_CODE IS NULL then 'NULL'
        else ITEM.ITEM_NAME
        end as NAME
    ,sum(ORDERS_DTL.ORDER_QTY) as SUM_QTY
from ORDERS
inner join WAREHOUSE on ORDERS.WH_CODE = WAREHOUSE.WH_CODE
left outer join ORDERS_DTL on ORDERS.ORDER_NO = ORDERS_DTL.ORDER_NO
left outer join ITEM on ORDERS_DTL.ITEM_CODE = ITEM.ITEM_CODE
where WAREHOUSE.WH_NAME = '浦和倉庫'
group by ORDERS_DTL.ITEM_CODE
having sum(ORDERS_DTL.ORDER_QTY) >= 50
order by SUM_QTY desc, CODE desc
;