Question

我有CTE，如下所示：

;with cte as  
(  
    SELECT  WeekNum
    FROM MonitorTable 
    GROUP BY WeekNum
    HAVING SUM(CASE WHEN IsProcessed = 1 THEN 1
               ELSE 0
          END) = 8
    order by WeekNum
) 
update MonitorTable 
set ReadToGrid = 0 
where WeekNum in (select WeekNum from cte)

这里的问题是它正在更新所有内容。由于总是必须剩下两个，我只能更新除了最后一个以外的所有内容。

所以，让我们说CTE会返回以下内容：

我无法更新所有内容;需要更新除最后两个（1,2,3,4）之外的所有内容。

那么如何修改脚本以便更新除最后两行之外的所有内容？

感谢。

Answer 1

没有数据我无法测试确切的语法，但这个想法会起作用：

Select WeekNum, Row_Number() Over (Order By WeekNum Desc) RowNum
From
(
SELECT  WeekNum
    FROM MonitorTable 
    GROUP BY WeekNum
    HAVING SUM(CASE WHEN IsProcessed = 1 THEN 1
               ELSE 0
          END) = 8
)
update MonitorTable set ReadToGrid = 0 where WeekNum in (select WeekNum from cte Where RowNum > 2)

更新除最后两个以外的所有内容？

1 个答案: