Sql server 查询访问中的计算字段计数

我有一个查询，我想计算打开位置-关闭（计算另一个表中关闭的行）并排除所有0结果

SELECT Positions.[Req #], tblPositionList.PositionName, 
       Positions.[Opening Date], Positions.[Close Date], 
       Positions.Status, Count([OpenPosition]![Close Date]) AS Closed,
       Positions.Openings AS Opened, [Opened]-[Closed] AS Remaining
FROM tblPositionList INNER JOIN (
       Positions INNER JOIN OpenPosition ON Positions.[Req #] = OpenPosition.[Req #]) 
ON (tblPositionList.PositionID = Positions.PositionID) AND
   (tblPositionList.PositionID = OpenPosition.PositionID)
GROUP BY Positions.[Req #], tblPositionList.PositionName, Positions.[Opening Date], 
         Positions.[Close Date], Positions.Status, Positions.Openings;

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我想在剩余字段中添加一个过滤器。

谢谢@user3728595，它工作得很好。 最后的剧本是

 SELECT Positions.[Req #], tblPositionList.PositionName, Positions.[Opening 
    Date], Positions.[Close Date], Positions.Status, Count([OpenPosition]![Close 
    Date]) AS Closed, Positions.Openings AS Opened, Positions.Openings-
    Count([OpenPosition]![Close Date]) AS Remaining
    FROM tblPositionList INNER JOIN (Positions INNER JOIN OpenPosition ON 
    Positions.[Req #] = OpenPosition.[Req #]) ON (tblPositionList.PositionID = 
    Positions.PositionID) AND (tblPositionList.PositionID = 
    OpenPosition.PositionID)
    GROUP BY Positions.[Req #], tblPositionList.PositionName, Positions.[Opening 
    Date], Positions.[Close Date], Positions.Status, Positions.Openings
    HAVING (((Positions.Openings-Count([OpenPosition]![Close Date]))>0));

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尝试替换

由
中的
计数（[OpenPosition]！[Close Date]）
你好，谢尔盖，谢谢。代码按原样工作，但我想在保留时添加一个过滤器。您不能在
选择
列表中计算字段，然后在同一
选择
列表中使用该字段的名称。不要将
[Opened]-[Closed]作为剩余
尝试使用
Positions.Openings-Count（[OpenPosition]！[Close Date]）作为剩余
。