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Excel/Delete duplicate entries

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Dear Tom,

Thanks for your help yesterday, it solved the problem perfectly.

I now have another problem, I need to delete duplicate entries for column A and let the higher value of column B to be the remaining value.  For example:

Column  A  B
       1  4
       1  2
       2  5
       2  9
       3  10
       3  10
becomes
Column  A  B
       1  4
       2  9
       3  10

I have written the following VBA to solve the problem:

Sub comb()
Dim i As Long

i = 1
Do While Cells(i + 1, 9) <> ""
If Cells(i, 9) = Cells(i + 1, 9) Then
   If Cells(i, 10) >= Cells(i + 1, 10) Then
   Rows(i + 1).EntireRow.Delete
   End If
   If Cells(i, 10) < Cells(i + 1, 10) Then
   Cells(i, 10) = Cells(i + 1, 10)
   Rows(i + 1).EntireRow.Delete
   End If
   
i = i + 1
End If


' If i > 1000 Then Exit Sub
Do While Cells(i, 9) <> Cells(i + 1, 9)
i = i + 1
Loop
Loop
End Sub

However, it does not solve multiple entries that has more than 2.  I do not know how should I put in the loop for it.
Basically, after running, it will become like this:

Column  A  B
       1  4
       1  2
       1  5

becomes
Column  A  B
       1  4
       1  5

instead of
Column  A  B
       1  5

How should I put the loop so that it can remove more than 1 duplication?

Thank you so much for your time.

Answer
Donald,

This worked for me with the data you show:

Sub comb()
Dim i As Long

i = 1
Do While Cells(i + 1, 9) <> ""
If Cells(i, 9) = Cells(i + 1, 9) Then
   If Cells(i, 10) >= Cells(i + 1, 10) Then
   Rows(i + 1).EntireRow.Delete
   ElseIf Cells(i, 10) < Cells(i + 1, 10) Then
   Cells(i, 10) = Cells(i + 1, 10)
   Rows(i + 1).EntireRow.Delete
   End If
Else
   i = i + 1
End If
Loop

End Sub

--
Regards,
Tom Ogilvy

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Tom Ogilvy

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Selected as an Excel MVP by Microsoft since 1999. Answering Excel questions in Allexperts since its inception in 2001. Able to answer questions on almost all aspects of Excel's internal capabilities. If seeking a VBA solution, please specify that in your question itself so I give you the answer you want. [Excel has weak protection - if you are distributing an application, I don't answer questions on how to protect your project from your users.]

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Extensive experience.

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Master of Science (MS) degree Operations Research (ORSA)

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Microsoft MVP in Excel.

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