主题：多表组合统计,怎么写多条件?

Dim bd1 As New GroupTableBuilder("统计表1",DataTables("进货单"))
Dim dt1 As fxDataSource

bd1.Groups.AddDef("编号")

bd1.Groups.AddDef("产品")

bd1.Groups.AddDef("类型")
bd1.Groups.AddDef("型号") '根据型号分组
bd1.Totals.AddDef("数量","进货_数量") '对数量进行统计
bd1.Totals.AddDef("金额","进货_金额") '对金额进行统计
dt1 = bd1.BuildDataSource()

Dim bd2 As New GroupTableBuilder("统计表2",DataTables("销售单"))
Dim dt2  As fxDataSource

bd1.Groups.AddDef("类型")
bd2.Groups.AddDef("型号") '根据型号分组
bd2.Totals.AddDef("数量","销售_数量") '对数量进行统计
bd2.Totals.AddDef("金额","销售_金额") '对金额进行统计
dt2 = bd2.BuildDataSource()

Dim bd3 As New GroupTableBuilder("统计表3",DataTables("退货单"))
Dim dt3 As fxDataSource

bd1.Groups.AddDef("类型")
bd3.Groups.AddDef("型号") '根据型号分组
bd3.Totals.AddDef("数量","退货_数量") '对数量进行统计
bd3.Totals.AddDef("金额","退货_金额") '对金额进行统计
dt3 = bd3.BuildDataSource()

dt1.Combine("型号",dt2,"型号") '将销售统计数据组合到进货统计数据
dt1.Combine("型号",dt3,"型号") '将退货统计数据组合到进货统计数据

Tables("窗口1_Table1").DataSource = dt1 '将统计结果绑定到Table
With DataTables("窗口1_Table1").DataCols  '用表达式列计算库存数据
    .Add("库存_数量",Gettype(Integer), "IsNull([进货_数量],0) - ISNULL([销售_数量],0) - ISNULL([退货_数量],0)")
    .Add("库存_金额",Gettype(Double), "[库存_数量] /[进货_数量] * [进货_金额]") 
End With

加粗部分多条件怎么写啊?

bd1.Filter = "xxxxx"

dt1 = bd1.BuildDataSource()

bd1
bd2
bd3

都有相同列,且都要取等值条件.

多个连接列的意思？

http://www.foxtable.com/help/topics/2392.htm

dt1.Combine("编号",dt2,"编号")
dt1.Combine("产品",dt2,"产品")

dt1.Combine("类别",dt2,"类别")

dt1.Combine("型号",dt2,"型号")

dt1.Combine("编号",dt3,"编号")
dt1.Combine("产品",dt3,"产品")

dt1.Combine("类别",dt3,"类别")

dt1.Combine("型号",dt3,"型号")

想要这样的条件