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 SALES_DTL.DELIVERED_QTY = 0 THEN '未出荷'
  WHEN SALES_DTL.DELIVERED_QTY != 0 AND SALES_QTY> DELIVERED_QTY THEN '一部出荷'
  WHEN SALES_DTL.DELIVERED_QTY = SALES_DTL.SALES_QTY THEN  '出荷済'
END AS "SHIP_STS"
FROM
SALES
LEFT JOIN SALES_DTL ON SALES.SALES_NO = SALES_DTL.SALES_NO 

ORDER BY 
SALES.SALES_DATE DESC,
SALES.SALES_NO,
SALES_DTL.ITEM_CODE