A Unique Count
Adjust the values in the constants section.
Option Explicit
Sub countUnique()
Const SourceColumn As Variant = 2 ' e.g. 2 or "B"
Const TargetColumn As Variant = 1 ' e.g. 1 or "A"
Const FirstRow As Long = 1
Dim rng As Range
Dim dict As Object
Dim Key As Variant
Dim Source As Variant, Target As Variant
Dim i As Long, UB As Long
Dim CurrString As String
Set rng = Columns(SourceColumn).Find(What:="*", _
LookIn:=xlFormulas, SearchDirection:=xlPrevious)
If rng Is Nothing Then GoTo exitProcedure
If rng.Row < FirstRow Then GoTo exitProcedure
Source = Range(Cells(FirstRow, SourceColumn), rng)
Set rng = Nothing
UB = UBound(Source)
Set dict = CreateObject("Scripting.Dictionary")
For i = 1 To UB
If Source(i, 1) <> "" Then
dict(Source(i, 1)) = dict(Source(i, 1)) + 1
End If
Next i
ReDim Target(1 To UB, 1 To 1)
For i = UB To 1 Step -1
CurrString = Source(i, 1)
If CurrString <> "" Then
Target(i, 1) = CurrString & Format(dict(CurrString), "00")
dict(CurrString) = dict(CurrString) - 1
End If
Next i
With Cells(FirstRow, TargetColumn)
.Resize(Rows.Count - FirstRow + 1).ClearContents
.Resize(UB) = Target
End With
MsgBox "Operation finished successfully."
exitProcedure:
End Sub