用行号更新列

Question

我在SQL Server存储过程中有一个带有ID和日期列的临时表。 该表已经填充了日期，我希望能够根据日期以升序在id列中添加序列号

我尝试了以下

UPDATE #Weeks 
SET Id = (
          SELECT ROW_NUMBER() OVER (ORDER BY WeekDate ASC) AS Id 
          FROM #Weeks AS DATA);

并得到这个错误。

子查询返回的值超过1。 当子查询遵循=，！=，<，<=，>，> =或将子查询用作表达式时，不允许这样做。

任何帮助表示赞赏。

这对我有用.....

更新#Weeks SET Id = tab.Id FROM #Weeks w内加入（选择WeekDate，ROW_NUMBER（）OVER（按WeekDate ASC排序）作为ID从#Weeks的ID）Tab ON w.WeekDate = Tab.WeekDate

Answer 1

尝试这个：

UPDATE #Weeks 
SET Id = Tab.Id
FROM #Week w
     INNER JOIN (
                 SELECT Id, 
                        ROW_NUMBER() OVER (ORDER BY WeekDate ASC) AS Id 
                 FROM #Weeks ) Tab ON w.Id = Tab.Id 

由于子查询返回的行多，而=运算符仅返回一行。

Answer 2

尝试这个

;with cte as
(
SELECT Id,ROW_NUMBER() OVER (ORDER BY WeekDate ASC) AS DATA FROM #Weeks 
)

UPDATE #Weeks SET Id=DATA from cte

Answer 3

  UPDATE #Weeks 
    SET Id = t.Id1
    FROM #Week w
    INNER JOIN
    (
      SELECT Id, ROW_NUMBER() OVER (ORDER BY WeekDate ASC) AS Id1 
      FROM #Weeks ) T ON w.Id = t.Id