9

我有一个名为SitecolumnsNameSiteId的表Sequence。我想用行号填充该Sequence字段。我尝试了以下查询,但它只是不更新​​记录:

WITH RowNumbers AS 
(
    select   SiteId,
             RowNum = row_number() OVER ( order by SiteId )
    from     [Site] 
)
UPDATE  s
SET     s.[Sequence] = r.RowNum
FROM    [Site] as s INNER JOIN RowNumbers as r ON s.SiteId = r.Row

我究竟做错了什么?

4

2 回答 2

16

您可以直接更新 CTE...

WITH RowNumbers AS 
(
    select   *,
             RowNum = row_number() OVER ( order by SiteId )
    from     [Site] 
)
UPDATE  RowNumbers
SET     [Sequence] = RowNum

这与可更新视图的工作方式相同。我添加*以确保更新的字段通过,然后直接更新。

于 2012-08-24T13:59:05.433 回答
3

你应该加入r.SiteID,而不是r.Row

WITH RowNumbers AS  
( 
    select   SiteId, 
             RowNum = row_number() OVER ( order by SiteId ) 
    from     [Site]  
) 
UPDATE  s 
SET     s.[Sequence] = r.RowNum 
FROM    [Site] as s INNER JOIN RowNumbers as r ON s.SiteId = r.SiteID
于 2012-08-24T13:58:32.890 回答