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.SALES_QTY> SALES_DTL.DELIVERED_QTY THEN '一部出荷' 
           WHEN SALES_DTL.SALES_QTY = SALES_DTL.DELIVERED_QTY THEN '出荷済'ELSE ' ' END 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