子表单不显示在表单视图中

Question

我有一个从包含计算字段的查询派生的子表单。它不会显示在表单视图中。我已经设置了主字段和子字段链接，并且我的“允许添加”属性设置为是。我发现的原因之一是“表单基于没有记录的表”。情况就是这样。当然是一对多的关系，子表单就是多边表。

这里是查询：

SELECT [Management Accounting table].Date_To_Budgets,
       [Management Accounting table].Date_Returned_To_SCM, 
       [Management Accounting table].Date_To_Assets, 
       [Management Accounting table].Date_Returned_From_Assets, 
       [Management Accounting table].Select_Fund, 
       [Management Accounting table].Project, 
       [Management Accounting table].Select_SubProgramme, 
       [Management Accounting table].Cost_Centre, 
       [Management Accounting table].Item, 
       [Management Accounting table].Supplier, 
       [Management Accounting table].Amount, 
       Sum([Management Accounting table].Amount) AS [Total Amount], 
       SLD_Number
       FROM [Management Accounting table]
       GROUP BY [Management Accounting table].Date_To_Budgets, 
                [Management Accounting table].Date_Returned_To_SCM, 
                [Management Accounting table].Date_To_Assets,
                [Management Accounting table].Date_Returned_From_Assets, 
                [Management Accounting table].Select_Fund,
                [Management Accounting table].Project,
                [Management Accounting table].Select_SubProgramme, 
                [Management Accounting table].Cost_Centre, 
                [Management Accounting table].Item, 
                [Management Accounting table].Supplier, 
                [Management Accounting table].Amount,
                SLD_Number;

Answer 1

GROUP BY 的查询根据定义是只读的。参见例如here.

因此，将“允许添加”属性设置为是无关紧要 - 您将无法根据此查询将数据输入到子表单中。

=> 如果查询显示没有记录，您的子表单将完全为空。