Hi,
I got this program from David McRitchie's website and I tweaked it a little
bit.
It works great with alphabets matching in columns A and B. It deletes the
whole row when col A and B contain the same alphabet.
I was wondering how I would change it in order to work with numbers instead
of alphabets. And how can I have it delete the rows that DO NOT match and
keep the ones that match? Any help would be appreciated. Thanks

Sub Delete_rows_based_on_ColA_ColB()
Application.ScreenUpdating = False
Application.Calculation = xlCalculationManual
Dim cell As Range, rng As Range, i As Long
Set rng = Columns("A").SpecialCells(xlConstants, xlTextValues)
For i = rng.Count To 1 Step -1
If LCase(rng(i).Value) = LCase(rng(i).Offset(0, 1).Value) Then
rng(i).EntireRow.Delete

Next i
Application.Calculation = xlCalculationAutomatic
Application.ScreenUpdating = True
End Sub