[英]Difficulty in creating update totals query on same table
Consider the following table: 请考虑下表:
ID nonUniqueID value total
--------------------------
1 12345 5 x
2 12345 10 x
3 789 20 x
4 789 5 x
I need to make a query something like this (psuedo SQL), which will work within Access 2007: 我需要进行如下查询(伪SQL),该查询将在Access 2007中运行:
UPDATE table
SET total = SUM(value)
WHERE nonUniqueID IS SAME;
The result should be as follows: 结果应如下所示:
ID nonUniqueID value total
--------------------------
1 12345 5 15
2 12345 10 15
3 789 20 25
4 789 5 25
I've tried group bys, but I got odd results that quite frankly, I could not interpret. 我已经尝试了分组方式,但是坦率地说,我得到的结果很奇怪,我无法解释。 Does anybody know how I could achieve something like this? 有人知道我能实现这样的目标吗?
Not sure if this works in Access or not, but give it a try: 不知道这是否可以在Access中工作,请尝试一下:
update table t1
inner join (
select nonUniqueID, sum(value) as SumValue
from table
group by nonUniqueID
) t2 on t1.nonUniqueID = t2.nonUniqueID
set t1.total = t2.SumValue
Update: Based on this question , it looks like it is not going to work. 更新:基于此问题 ,看来它无法正常工作。 But give it a shot! 但是试一试! If it doesn't, you can use the approach suggested in that question. 如果不是,则可以使用该问题中建议的方法。
Another possible option: 另一个可能的选择:
update t
set total = (select SUM(value) from table where nonUniqueID = t.nonUniqueID)
from table t
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