SELECT SALES.SALES_DATE AS SAL_DATE,
    SALES.SALES_NO AS NO,
    SALES_DTL.ITEM_CODE AS ITEM_CODE,
    SALES_DTL.SALES_QTY AS SAL_QTY,
    SALES_DTL.DELIVERED_QTY AS DEL_QTY,
        CASE 
            WHEN DELIVERED_QTY = 0 THEN '未出荷'
            --WHEN SALES_QTY > DELIVERED_QTY THEN '一部出荷'
            --ELSE SALES_QTY = DELIVERED_QTY THEN '出荷済'
        END
        AS SHIP_STS
FROM SALES
INNER JOIN SALES_DTL
ON SALES.SALES_NO = SALES_DTL.SALES_NO
;