主题：怎么汇总3个表中数据？？

 合并三个表数据？

方法一：分别合并填充

http://www.foxtable.com/webhelp/scr/0680.htm

方法二：用查询表，union all 语句

http://www.foxtable.com/webhelp/scr/0688.htm

具体问题上传例子说明。

做个按钮，执行下面代码

DataTables("线下全部订单数据表").DataRows.Clear
Dim Vals As List(of String())
Vals = DataTables("线下待发货订单数据表").GetValues("订单号|销售商编号")
For i As Integer = 0 To Vals.Count - 1
    Dim dr2 As DataRow = DataTables("线下全部订单数据表").AddNew()
    dr2("订单号") = Vals(i)(0)
    dr2("销售商编号") = Vals(i)(1)
Next
Vals = DataTables("线下已发货数据表").GetValues("订单号|销售商编号")
For i As Integer = 0 To Vals.Count - 1
    Dim dr2 As DataRow = DataTables("线下全部订单数据表").AddNew()
    dr2("订单号") = Vals(i)(0)
    dr2("销售商编号") = Vals(i)(1)
Next
Vals = DataTables("线下已收货数据表").GetValues("订单号|销售商编号")
For i As Integer = 0 To Vals.Count - 1
    Dim dr2 As DataRow = DataTables("线下全部订单数据表").AddNew()
    dr2("订单号") = Vals(i)(0)
    dr2("销售商编号") = Vals(i)(1)
Next