Datetime SSIS合并状态日期时间未更新

我正在SSIS包中使用Merge语句。问题是当我运行包时，它不会更新datetime列。它正确插入日期时间，但如果源数据库中有新的日期时间可用，则不会将其从NULL更新为某个日期时间。 源和目标都具有相同的列类型datetime2，null。 截断临时表后，我将在SQL任务中使用下面的代码

MERGE abc.dbo.invoices AS targe

USING (SELECT 

   ID      
  ,cash_received_date
  ,schedule_datetime
  ,delivery_date

FROM Staging.dbo.tmpabcinvoices) AS sourc
ON targe.id = sourc.id
WHEN MATCHED and  
targe.schedule_datetime <> sourc.schedule_datetime
or
targe.delivery_date <> sourc.delivery_date
or
targe.cash_received_date <> sourc.cash_received_date

THEN UPDATE SET 
,targe.schedule_datetime=sourc.schedule_datetime
,targe.delivery_date=sourc.delivery_date
,targe.cash_received_date=sourc.cash_received_date

WHEN NOT MATCHED THEN
INSERT(

      old_invoiceid         
      ,cash_received_date
      ,schedule_datetime
      ,delivery_date

)
VALUES
(

      sourc.old_invoiceid
      ,sourc.cash_received_date
      ,sourc.schedule_datetime
      ,sourc.delivery_date

);
GO

---

您有一个逗号，它不应该出现在此行的开头：

,targe.schedule_datetime=sourc.schedule_datetime

此外，您还需要添加以下内容来处理空值：

targe.schedule_datetime <> sourc.schedule_datetime
or (targe.schedule_datetime IS NULL AND sourc.schedule_datetime IS NOT NULL)
or targe.delivery_date <> sourc.delivery_date
or (targe.delivery_date IS NULL AND sourc.delivery_date IS NOT NULL)
or targe.cash_received_date <> sourc.cash_received_date
or (targe.cash_received_date IS NULL AND sourc.cash_received_date IS NOT NULL)

---

虽然ANSI_NULLS设置为ON，但NULLS基本上是未知的，因此它们不能计算为“等于”或“不等于”。

谢谢，这很有帮助。