comparing 2 columns

I have got a set of data returned from a query – exported to excel. I have 2 rows of data I need to “compare”, they are called invoice_num and invoice_ID. If a unique invoice_num appears in 20 consecutive rows – there should also be a unique invoice_ID which should also appear in the same 20 rows.
 i.e.

invoice_num             invoice_id
12345                  34567
12345                  34567
12345                  34567
55555                  99999
55555                  99999
12348                  50006
12348                  50006


As it stands invoice_num is in column A and invoice_ID is in column B. I presume an additioanl column i.e. Z that has some sort of summary would be fine. An exception would be if you have unique invoice_num but different invoice_ID on different rows, and vice versa.
LVL 3
pma111Asked:
Who is Participating?
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.

Randy PooleCommented:
Not quite sure what you are asking for here. Can you give an example
0
Rgonzo1971Commented:
Hi,

pls try

=IF(SUM(IF(FREQUENCY(($A$2:$A$8=A2)*($B$2:$B$8),($A$2:$A$8=A2)*($B$2:$B$8))>0,1))-2+SUM(IF(FREQUENCY(($B$2:$B$8=B2)*($A$2:$A$8),($B$2:$B$8=B2)*($A$2:$A$8))>0,1))-2,"Not OK","OK")

Regards
EE20140910.xlsx
0
Rob HensonFinance AnalystCommented:
Assuming data in columns A & B, the following formula in column C will give blank for first occurence of Invoice or TRUE or FALSE depending whether the Invoice ID matches the first occurence:

=IFERROR(B2=VLOOKUP(A2,$A$1:B1,2,FALSE),"")

Copy into C2 and then copy down. The lookup range will extend as you copy down. You can then filter for FALSE to get those that don't match.

Thanks
Rob H
0

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
tomfarrarCommented:
If this is an ongoing requirement you could make a table out of the two columns and create two linked pivot tables, one with column A left-most row and one with column B left-most row ( in traditional pivot table format) and the abnormal combinations will visually stand out.
0
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.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.