Macro to prevent duplicate entries in multiple columns

[Raaj Chauhan]

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[TD="class: postcell"] I am currently using this macro to prevent users from entering similar entries within a spreadsheet. This is working fine in a single column. But how can I add similar in multiple columns (like Column A, D and F). Each column as to allow only unique records only. Please help me out


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[TD="class: postcell"] I am currently using this macro to prevent users from entering similar entries within a spreadsheet. This is working fine in a single column. But how can I add similar in multiple columns (like Column A, D and F). Each column as to allow only unique records only. Please help me out


Private Sub Worksheet_Change(ByVal Target As Range)
With Target
If .Column <> 1 Or .Cells.Count > 1 Then Exit Sub
If WorksheetFunction.CountIf(Columns(.Column), .Value) > 1 Then
Application.DisplayAlerts = False
.ClearContents
Application.DisplayAlerts = True
MsgBox "Aadhar no. already exists!"
End If
End With
End Sub


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[Fluff]

Cross posted https://stackoverflow.com/questions/48437541/macro-to-prevent-duplicate-entries-in-multiple-columns#

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