主题：请教:合并数据的问题.

 首先要确定你Excel的订单编号的列在第几列，才能写代码。

Dim Book As New XLS.Book("c:\test\订单.xls")
Dim Sheet As XLS.Sheet = Book.Sheets(0)
Tables("订单").StopRedraw()
'注意以下数组中列名称的顺序,必须和Excel表中的列顺序一致
Dim nms() As String = {"订单编号", "产品","客户","雇员","单价","折扣","数量","日期"}
'注意下面的循环变量从1开始,而不是从0开始,因为Excel表的第一行是标题
For n As Integer = 1 To Sheet.Rows.Count -1
    If DataTables("订单").Find("订单编号 = '" & sheet(n, 0).Value & "'") Is Nothing Then
        Dim r As Row = Tables("订单").AddNew()
        For m As Integer = 0 To nms.Length - 1
            r(nms(m)) = Sheet(n,m).Value
        Next
    End If
Next
Tables("订单").ResumeRedraw()

 单一条件合并，需要自己编写代码完成。参考

 http://www.foxtable.com/help/topics/2137.htm