Excel如何实现两个工作表数据的对比

Sub 数据对比()
    Dim i As Integer
    Dim j As Integer
    For i = 2 To 3225      ‘员工基础报表数据范围
        For j = 2 To 2028    ‘员工待遇统计表数据范围
         If Sheets("old").Cells(i, 6) = Sheets("new").Cells(j, 6) Then
               Sheets("old").Cells(i, 8) = "已存在"   ‘存在时进行标记
         End If
        Next j
    Next i
End Sub