SELECT [S].[SALES_DATE] AS [SAL_DATE]
,[SD].[SALES_NO] AS [NO]
,[SD].[ITEM_CODE] AS [ITEM_CODE]
,[SD].[SALES_QTY] AS [SAL_QTY]
,[SD].[DELIVERED_QTY] AS [DEL_QTY]
,CASE WHEN [SD].[DELIVERED_QTY] = 0 THEN '未出荷'
      WHEN [SD].[DELIVERED_QTY] <> 0
            AND [SD].[SALES_QTY] > [SD].[DELIVERED_QTY]
            THEN '一部出荷'
      WHEN [SD].[DELIVERED_QTY] = [SD].[SALES_QTY] THEN '出荷済'
      END AS [SHIP_STS]
FROM [SALES] AS [S]
LEFT OUTER JOIN [SALES_DTL] AS [SD]
ON [S].[SALES_NO] = [SD].[SALES_NO]