How do you compare 2 list of numbers and highlight the difference

[Jay Jones]

I have to compare 2 lists of numbers every month and find the difference
between them

 

[Peter Rooney]

Jay,

See if you can adapt this:

Sub ListCompare()
Dim CompSheet As Worksheet

Dim List1 As Range 'range of cells containing your first list eg B3:B32
Dim List1Header As Range 'label at the top of list 1 e.g. B2
Dim List1Item As Range

Dim List2 As Range 'range of cells containing your second list e.g.D332
Dim List2Header As Range 'label at the top of list 1 e.g. D2
Dim List2Item As Range

Dim List1OnlyHeader As Range 'label above where you want items found
ONLY in first list to appear e.g.F2
Dim List2OnlyHeader As Range 'label above where you want items found
ONLY in second list to appear e.g. H2
Dim ListBothHeader As Range 'label above where you want items found in
BOTH lists to appear e.g. J2

Dim Flag As Boolean

'In my example, List1 is B3:B32 and List2 is D332, although the code
works out
'how long the lists are and allocates the names List1 and List2 to the
cells containing them (the
'data only, not the headers).

'Make sure that there is a blank column to the left of List1Header, and
blank
'columns between List1OnlyHeader and List2OnlyHeader, and between
List2OnlyHeader and ListBothHeader.

'Finally, make sure there is a blank column to the right of
ListBothHeader.
'This ensures that all the "CurrentRegion" referenece work correctly.
'In my example:
' Cell F2 contains the label "List1Only" and has a range name of
"List1OnlyHeader",
' Cell H2 contains the label "List2Only" and has a range name of
"List2OnlyHeader",
' Cell J2 contains the label "Both" and has a range name of
"ListBothHeader",

'Columns A, D, E, G, I and K must be blank (or at the very least,
mustn't contain data adjacent to the
'entries in columns B, D, F, H and K.
'The worksheet is called "Compare Lists"

Set CompSheet = Worksheets("Compare Lists")

Set List1Header = CompSheet.Range("List1Header")
Set List1OnlyHeader = CompSheet.Range("List1OnlyHeader")
Set List2Header = CompSheet.Range("List2Header")
Set List2OnlyHeader = CompSheet.Range("List2OnlyHeader")
Set ListBothHeader = CompSheet.Range("ListBothHeader")

If List1Header.CurrentRegion.Rows.Count = 1 Then
MsgBox ("You don't have any entries in List 1!")
Exit Sub
End If

If List2Header.CurrentRegion.Rows.Count = 1 Then
MsgBox ("You don't have any entries in List 2!")
Exit Sub
End If

List1Header.Offset(1, 0).Resize(List1Header.CurrentRegion.Rows.Count -
1, 1).Name = "List1"
List2Header.Offset(1, 0).Resize(List2Header.CurrentRegion.Rows.Count -
1, 1).Name = "List2"

Set List1 = CompSheet.Range("List1")
Set List2 = CompSheet.Range("List2")

'Clear List1 only entries produced when macro last run
If List1OnlyHeader.CurrentRegion.Rows.Count > 1 Then
List1OnlyHeader.Offset(1,
0).Resize(List1OnlyHeader.CurrentRegion.Rows.Count - 1).ClearContents
End If
'Clear List2 only entries produced when macro last run
If List2OnlyHeader.CurrentRegion.Rows.Count > 1 Then
List2OnlyHeader.Offset(1,
0).Resize(List2OnlyHeader.CurrentRegion.Rows.Count - 1).ClearContents
End If
'Clear ListBoth entries produced when macro last run
If ListBothHeader.CurrentRegion.Rows.Count > 1 Then
ListBothHeader.Offset(1,
0).Resize(ListBothHeader.CurrentRegion.Rows.Count - 1).ClearContents
End If

'Check which items are only in list 1 and not in List 2
For Each List1Item In List1
Flag = False
For Each List2Item In List2
If List2Item.Value = List1Item.Value Then
Flag = True
End If
Next
If Flag = False Then
'MsgBox (List1Item.Value & " is only in List 1!")
List1OnlyHeader.Offset(List1OnlyHeader.CurrentRegion.Rows.Count,
0).Value = List1Item.Value
Else
'MsgBox (List1Item.Value & " is in both Lists!")
ListBothHeader.Offset(ListBothHeader.CurrentRegion.Rows.Count,
0).Value = List1Item.Value
End If
Next

'Check which items are only in list 2 and not in List 1
For Each List2Item In List2
Flag = False
For Each List1Item In List1
If List1Item.Value = List2Item.Value Then
Flag = True
End If
Next
If Flag = False Then
'MsgBox (List2Item.Value & " is only in List 2!")
List2OnlyHeader.Offset(List2OnlyHeader.CurrentRegion.Rows.Count,
0).Value = List2Item.Value
Else 'Included only for completeness - you already worked out which
items
'were in both lists in the previous loop!
'MsgBox (List2Item.Value & " is in both Lists!")
'ListBothHeader.Offset(ListBothHeader.CurrentRegion.Rows.Count,
0).Value = List2Item.Value
End If
Next

'Sort List1Only list
List1OnlyHeader.CurrentRegion.Sort Key1:=Range("List1OnlyHeader"), _
Order1:=xlAscending, Header:=xlGuess, _
OrderCustom:=1, MatchCase:=False, _
Orientation:=xlTopToBottom

'Sort List2Only list
List2OnlyHeader.CurrentRegion.Sort Key1:=Range("List2OnlyHeader"), _
Order1:=xlAscending, Header:=xlGuess, _
OrderCustom:=1, MatchCase:=False, _
Orientation:=xlTopToBottom

'Sort ListBoth list
ListBothHeader.CurrentRegion.Sort Key1:=Range("ListBothHeader"), _
Order1:=xlAscending, Header:=xlGuess, _
OrderCustom:=1, MatchCase:=False, _
Orientation:=xlTopToBottom

End Sub

Hope it's of some use

Pete