DB2SQL分区

我遇到的问题是不能为同一个单元显示不同的订单日期

Unit    OrderDate     ShipDate   ReceiptDate  
Robot 20160101       20160102   20160103   
Robot 20160102       20160103   20160104 
Robot 20160103       20160104   20160105   

相反，它显示的是所有三条记录的相同订单日期

单位订单日期发货日期收货日期 机器人20160101 20160102 20160103 机器人20160101 20160103 20160104 机器人20160101 20160104 20160105

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您显示的输出似乎与查询不匹配。如果按该列分组，如何得到salesorder.unitid的三个相同值？我猜您实际上希望按salesorder.eventdate分组

SELECT salesorder.unitid "Unit",
       max(salesorder.eventdate) "OrderDate",
       max(salesdelivery.eventdate) "ShipDate",
       max(salesreceipt.eventdate) "ReceiptDate"
FROM (
  SELECT eventdate,
         unitid
  FROM sales
  WHERE event = 'ORDER'
    AND eventdate > '2015-12-31'
    AND eventdate < '2016-02-01'
) salesorder
  LEFT OUTER JOIN (
    SELECT eventdate,
           unitid
    FROM sales
    WHERE event = 'SHIP'
      AND eventdate > '2015-12-31'
      AND eventdate < '2016-02-01'
  ) salesdelivery ON salesorder.unitid = salesdelivery.unitid
  LEFT OUTER JOIN (
    SELECT eventdate,
           unitid
    FROM sales
    WHERE event = 'RECEIPT'
      AND eventdate > '2015-12-31'
      AND eventdate < '2016-02-01'
  ) salesreceipt ON salesdelivery.unitid = salesreceipt.unitid
WHERE salesdelivery.eventdate > salesorder.eventdate
  AND salesreceipt.eventdate > salesdelivery.eventdate
  AND salesorder.unitid = '001'
GROUP BY salesorder.unitid