4 columns compared for uniqueness

Greetings,

I have 4 columns and am trying to compare each column to assure no names are repeated. The actual columns in question are about 30000 entries in-length. I shortened it here for ease of viewing. Could you suggest an approach to compare these four columns? I was having a challenge trying VLOOKUP.

Thank you!
JohnD
pairwise-comparisons.xlsx
LVL 1
John DarbyPMAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Martin LissOlder than dirtCommented:
Try this macro.

Sub CheckForDuplicates()

Dim colValues As Collection
Dim lngLastRow As Long
Dim lngRow As Long
Dim lngCol As Long

lngLastRow = Range("C1048576").End(xlUp).Row

For lngRow = 2 To lngLastRow
    Set colValues = New Collection
    For lngCol = 3 To 6
        On Error Resume Next
        colValues.Add Cells(lngRow, lngCol).Value, CStr(Cells(lngRow, lngCol).Value)
        On Error GoTo 0
    Next
    If colValues.Count <> 4 Then
        Cells(lngRow, "G").Value = "Has dupliacte(s)"
    End If
Next

Open in new window

tomfarrarCommented:
VBA is certainly a good way.  But you can use the Exact() and Trim() formulas too.  Normally Exact() would be fine by itself if there are no extra spaces in the cell names.  See attached.
Copy-of-pairwise-comparisons.xlsx

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
John DarbyPMAuthor Commented:
Great options...the EXACT/TRIM was the easiest solution. Thank you, both!
Martin LissOlder than dirtCommented:
I'm glad I was able to help.

In my profile you'll find links to some articles I've written that may interest you
including these two new ones.
Creating your own Excel Formulas and doing the impossible
A Guide to Writing Understandable and Maintainable VBA Code
Marty - MVP 2009 to 2015, Experts-Exchange Top Expert Visual Basic Classic 2012 to 2014
tomfarrarCommented:
Glad to also be of help.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft Excel

From novice to tech pro — start learning today.