如何定义嵌套SQL语句以返回计算值？

问题如下。我有以下SQL语句：

// SQL statement for ms access 2010
SELECT 
    ID, SUM(fund_assets) AS Sum_FV, COUNT(*) AS DataCount, 
    (Sum_FV / DataCount) AS Result
FROM 
    V_Assets_L12
WHERE 
    Datum >= DATEADD("m", -12, #6/2/2017#) 
    AND Datum <= #6/2/2017# 
    AND ID = 325
GROUP BY 
    ID
ORDER BY 
    ID;

---

但这对我不起作用。我做错了什么？

您可以删除

WHERE

子句中的条件：

SELECT ID, SUM(fund_assets) AS Sum_FV, COUNT(*) AS DataCount,
       (Sum_FV / DataCount) AS Result
FROM V_Assets_L12
WHERE Datum >= DateAdd("m", -12, #6/2/2017#) And
      Datum <= #6/2/2017#
GROUP BY ID
ORDER BY ID;

选择ID，SUM（基金资产）作为SUM\u FV，COUNT（*）作为DataCount，
（总和/数据计数）作为结果
来自V_资产12
其中基准>=日期添加（“m”、-12、#6/2/2017#）和
如果我想选择3个ID，例如325、466和30014，那么数据是什么。我如何解决这个问题？
SELECT ID, SUM(fund_assets) AS Sum_FV, COUNT(*) AS DataCount,
       (Sum_FV / DataCount) AS Result
FROM V_Assets_L12
WHERE Datum >= DateAdd("m", -12, #6/2/2017#) And
      Datum <= #6/2/2017#
GROUP BY ID
ORDER BY ID;