Excel or VBA - VLOOKUP with IF Coniditon - excel

Question

Hi,
I would like to investigate a huge list that I can distinguish the Acc numbers according to the mail adresses. The things that I
would like to do if email adresses has a seperate Acc and if they
equal each other( I mean if Acc numbers are equal),write a "equal" if
the criterias were not equal with the same email then write a
"multiple criteria"..
Is there any way to do that with Excel formulas or VBA ?
Mail Acc
uralsmh#gmail.com C1234
uralsmh#gmail.com C2345

Answer 1

Part 1 - check for duplicates
Create a helper column that sticks columns A and B together and then count this column. You can use the & character for this:
A B C D
1 abc 123 =A1&B1 =COUNTIF($C$1:$C$1000,C1)
2 abc 123 =A2&C2 =COUNTIF($C$1:$C$1000,C2)
3 def 123 =A3&C3 =COUNTIF($C$1:$C$1000,C3)
If you get a number greater than 1 in column D, then that row is a duplicate of another row.
Part 2 - find multiple accounts
Now you have found the exact duplicates, any email addresses that match must have different account numbers. So, in column E, just count column A:
A B C D E
1 abc 123 =A1&B1 =COUNTIF($C$1:$C$1000,C1) =COUNTIF($A$1:$A$1000,A1)
2 abc 123 =A2&C2 =COUNTIF($C$1:$C$1000,C2) =COUNTIF($A$1:$A$1000,A2)
3 def 123 =A3&C3 =COUNTIF($C$1:$C$1000,C3) =COUNTIF($A$1:$A$1000,A3)
If you get a number greater than 1 in column E and you had a 1 in column D, you have found an email address with multiple accounts.