WITH WH AS (
    SELECT WH_CODE
    FROM WAREHOUSE
    WHERE WH_NAME = '浦和倉庫'
)
SELECT
    ITEM_CODE AS CODE,
    ITEM_NAME AS NAME,
    SUM(ORDER_QTY) AS SUM_QTY
FROM ORDERS
    INNER JOIN WH
        USING(WH_CODE)
    INNER JOIN ORDERS_DTL
        USING(ORDER_NO)
    LEFT OUTER JOIN ITEM
        USING(ITEM_CODE)
GROUP BY
    CODE,
    NAME
HAVING
    SUM_QTY >= 50
ORDER BY
    SUM_QTY DESC,
    CODE DESC
;