TSQL更新查询，在运行

Question

该更新领域我有如下表（表1）：

+----+-----+ 
|Type|Value| 
+----+-----+ 
|P |4 | 
+----+-----+ 
|P |20 | 
+----+-----+ 
|S |0 | 
+----+-----+ 
|S |0 | 
+----+-----+ 
|S |0 | 
+----+-----+ 

我运行下面的查询：

update Table1 set value = (select sum(value) FROM Table1) where Type = 'S' 

结果将是24对所有字段的值='S'

我需要的是考虑在运行时更新的值。 结果，我需要：

+----+-----+ 
|Type|Value| 
+----+-----+ 
|P |4 | 
+----+-----+ 
|P |20 | 
+----+-----+ 
|S |24 | 
+----+-----+ 
|S |48 | 
+----+-----+ 
|S |96 | 
+----+-----+ 

这是如何可以在一个简单的查询？

谢谢你，

Answer 1

DECLARE @ID int
DECLARE cur CURSOR local select ID from table1 where Type = 'S'
FETCH cur into @ID
WHILE @@FETCH_STATUS=0
BEGIN
update Table1 set value = (select sum(value) FROM Table1) where ID=@ID
FETCH cur into @ID
END
Close cur
DEALLOCATE cur