主题：如何删除重复行

在导入数据后，发现有很多数据行是重复的，现要根据其中的某个字段来判断，如果这个字段是重复，就删除其他行，只保留一行。如何写代码？例如表A,以第一列为判断，该如何写代码？

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点击浏览该文件:管理项目2.table

 

Dim idx As String = "-1,"
Dim idx_temp As String = ""
Dim pdr As DataRow = Nothing
Dim count As Integer = 0
Dim cs As String = "第一列"
For Each dr As DataRow In DataTables("表A").Select("", cs)
   
    Dim flag As Boolean = False
    If pdr IsNot Nothing Then
        For Each c As String In cs.split(",")
            If pdr(c) <> dr(c) Then
                flag = True
                Exit For
            End If
        Next
       
        If flag Then
            If count > 1 Then
                idx &= idx_temp
            End If
            count = 1
            idx_temp = ""
        Else
            count += 1
            idx_temp &= dr("_Identify") & ","
        End If
    End If
   
    pdr = dr
Next

If count > 1 Then
    idx &= idx_temp
End If

'Tables("表A").filter = "_Identify not in (" & idx.trim(",") & ")"

DataTables("表A").DeleteFor("_Identify In (" & idx.trim(",") & ")")

有点看花眼，好好学习，谢谢大红袍，不知你是怎样炼成的