更新语句中使用别名

Question

这是不被编译我的更新语句不编译：

Update Documents d 
     Set 
      DocumentDate = 1, 
      LastStatusChangedDateTime = (
       Select Top 1 DATEADD(ss,1,StatusChangedDateTime) 
        From [dbo].[DocumentStatusesHistory] dsh 
         Where dsh.DocumentID = d.DocumentID 
      ) 
      Where DocumentID In 
      (
       Select Data From dbo.Split(@DocumentIDs,',') 
      ) 

我无法使用d别名。我怎样才能解决这个问题？

Answer 1

这个怎么样？

Update Documents 
     Set 
      DocumentDate = 1, 
      LastStatusChangedDateTime = (
       Select Top 1 DATEADD(ss,1,StatusChangedDateTime) 
        From [dbo].[DocumentStatusesHistory] dsh 
         Where dsh.DocumentID = d.DocumentID 
      ) 
     From Documents d 
      Where DocumentID In 
      (
       Select Data From dbo.Split(@DocumentIDs,',') 
      ) 

Answer 2

添加FROM条款：

Update d 
Set 
DocumentDate = 1, 
LastStatusChangedDateTime = (
       Select Top 1 DATEADD(ss,1,StatusChangedDateTime) 
        From [dbo].[DocumentStatusesHistory] dsh 
         Where dsh.DocumentID = d.DocumentID 
) 
FROM Documents AS d 
... 

Answer 3

试试这个：

UPDATE d 
SET  d.DocumentDate = 1 , 
     d.LastStatusChangedDateTime = (SELECT TOP 1 
              DATEADD(ss, 1, 
                StatusChangedDateTime) 
             FROM [dbo].[DocumentStatusesHistory] dsh 
             WHERE dsh.DocumentID = d.DocumentID 
           ) 

从原稿D WHERE d.DocumentID IN（SELECT数据 FROM dbo.Split（@DocumentIDs， '，'））