答案在这里：

http://www.foxtable.com/help/topics/2669.htm

帮我写一下吧

你这是后面添加的计算，不能用哪个方法，你直接针对统计表设置汇总模式即可：

http://www.foxtable.com/help/topics/1372.htm

Dim bd1 As New GroupTableBuilder("统计表1",DataTables("行政案件"))
Dim dt1 As fxDataSource
bd1.Groups.AddDef("办案部门") \'根据办案部门分组
dt1 = bd1.BuildDataSource()
Tables("统计_Table1").DataSource = dt1 \'将统计结果绑定到Table
With DataTables("统计_Table1").DataCols \'用表达式列计算库存数据
    .Add("金额(元)_行政罚款",Gettype(Decimal))
    .Add("金额(元)_款1",Gettype(Decimal))
    .Add("金额(元)_合计",Gettype(Decimal))
    .Add("查办案件(宗)_投诉",Gettype(Integer))
End With
For Each dr As Row In Tables("统计_Table1").Rows
    dr("罚款金额(元)_行政罚款") = DataTables("行政案件").Compute("Sum(行政罚款)", "[办案部门] = \'" & dr("办案部门") & "\' And [结案日期]>=#" & e.form.controls("DateTimePicker1").Value & "# and [结案日期]<=#" & e.form.controls("DateTimePicker2").Value & "# ")
    dr("罚款金额(元)_折1") = DataTables("行政案件").Compute("Count(款1)", "[办案部门] = \'" & dr("办案部门") & "\' And [结案日期]>=#" & e.form.controls("DateTimePicker1").Value & "# and [结案日期]<=#" & e.form.controls("DateTimePicker2").Value & "# ")
    dr("罚款金额(元)_合计") = dr("罚款金额(元)_木材折款")+dr("罚款金额(元)_行政罚款")
    dr("查办案件(宗)_投诉") = DataTables("行政案件").Compute("Count(办案部门)", "[办案部门] = \'" & dr("办案部门") & "\' And [来源]=\'投诉\'And [结案日期]>=#" & e.form.controls("DateTimePicker1").Value & "# and [结案日期]<=#" & e.form.controls("DateTimePicker2").Value & "# ")
Next
Dim g As New Subtotalgroup
g.Aggregate = AggregateEnum.Sum
g.GroupOn = "*"

g.TotalOn = "罚款金额(元)_行政罚款,罚款金额(元)_折1,罚款金额(元)_合计,查办案件(宗)_投诉"
g.Caption = "总计"
Tables("统计_Table1").SubtotalGroups.Add(g)
Tables("统计_Table1").Subtotal