类似,看懂代码自己改改
Dim Arys As List(Of String())
Arys = DataTables("订单A").GetValues("单号|版本号",,"版本号 desc")
For i As Integer = arys.Count - 1 To 1 Step -1
If Arys(i)(0) = Arys(i-1)(0) Then Arys.RemoveAt(i)
Next
For Each Ary As String() In Arys
For Each dr As DataRow In DataTables("订单A").Select("[单号] = '" & Ary(0) & "' And [版本号]= '" & Ary(0) & "'")
'添加到第二个表'
Next
Next