老师，如表，增加了个列”具体日期“， 只要具体日期相同的只计算一次相同产品，以下代码该如何修改，谢谢。
Dim dt As DataTable = DataTables("表C")
Dim C As List(Of String())
C = dt.GetValues("月份|产品","产品 is not null")
Dim dr As DataRow
For Each Customer As String() In C
dr = dt.find("[月份] = '" & Customer (0) & "' and 产品='" & Customer (1) & "'")
dr("总数量") = dt.Compute("Sum(数量)","[月份] = '" & Customer(0) & "' and 产品='" & Customer(1) & "'")
dr("产品重复笔数") = dt.Compute("COUNT(产品)","[月份] = '" & Customer(0) & "' and 产品='" & Customer(1) & "'")
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Post By：2023/8/26 11:37:00 [显示全部帖子]
