Difference in two columns in excel.

You can use an array formula, enter the following in C2:

=IFERROR(IFERROR(INDEX($A$2:$A$9, MATCH(0, COUNTIF($C$1:D1, $A$2:$A$9), 0)), INDEX($B$2:$B$9, MATCH(0, COUNTIF($C$1:C4, $B$2:$B$9), 0))), "")

Select allOpen in new window

Then drag down as far as you need.

This will return the unique values from two lists: A2:A9, B2:B9

Note: It must be an Array Formula (ctrl+shft+entr)

Try this link
http://mobile.experts-exchange.com/questions/28331653/Manage-email-addresses.html

Mr. MacroShadow thanks for your support but I didnt understand it,
Mr. itjockey, thanks for your support but it is an endless discussion and the answer is not clear.Please give me more details or clarifcations
Warm Regards
Ihab

I'm not sure what you don't understand, if it's the formula - don't worry about that as long as it works (although it is worthwhile understanding if you're up to it...). If its how to add an array formula - follow these steps:
1. Paste the formula in C2.
2. Press the Control, Shift and Enter keys simultaneously.
3. Let go.
4. Click the little black handle in the corner of a C2 and drag down as far as you need.

That's it!

Note: The aforementioned formula assumes that your lists are located in A2:A9 and B2:B9. Change those ranges to match the location of your lists. IMPORTANT! Don't forget the Dollar signs, to add the dollar signs: select the range i.e. A2:A9 and press F4.
The aforementioned formula also assumes that you want the list of emails not sent to in C2 and down, that can be changed to suit your needs.

I hope this explains the matter.
EE-Demo.xlsm

Go to my link and see accepted solution. In that comment there is attachment file. I guess it will solve your problem. But I think Mr.MacroShadow array formula is the same as mine.

@MacroShadow.   I don't jump in to this question. I seen your comment after I posted.

Thanks

Please give me the unique emails that doesnt exist in both tables, I am sorry I did a lot of effort it didnt work
Thanks
A1.xls
w2.xls

You said you had two columns, you didn't say they were in two files ... The first step is combine the files.

In the attached file you will find two columns with the data from your files (minus the blank records), a column with the array formula and a column with the values returned from the formula (pasted as values).
Uniques.xls

Mr. Marc , my goal is not just to take the unique records ,I want w2 records minus  a1 records=(records that didnt recive my email)
I hope you get my idea, because what you have sent is the records are mixed again , you just remove the duplicate.
Thanks

Do all records that exist in a1 exist also in w2?

See Column I in attached.hide unwanted columns.
Unique-Values.xlsx

A1 list=236
w2=48

If all w2 records  exist in A1 then , it should equal =188. What you give me equals 26! how is that

or if there is a way to compare the two columns and neglect the address that are exists in the two columns and give me only the one that didn't repeat?

Isn't that what I answered @ a39981427

Mr.ihab_h,

in column I Do formula drop down.

Thanks

Hi
Which column ?