worksheet function - How to remove it items from one Excel list, if the same item exist in different list

I know nothing about Excel, so the first thing I would like to do is to remove any duplicates from within the lists themselves.

But then I would also like any rows from list B that has a duplicate row in list A to be removed.

For example, if the email John@John.com is in list B and there is also a John@john.com in list A, I want to remove John@john.com from list B.

Answer

To remove the duplicates:

1. Select the range of cells, or make sure that the active cell is in a table.


2. On the Data tab, in the Data Tools group, click Remove Duplicates.

To remove duplicates form list A in list B:

=IF(COUNTIF(ListB!$A:$A;ListA!A1)>0;"";ListB!A1)

First of all, you need to make a new sheet ListC For example, This is what you should paste into ListC at A1 and pull it down across.
Of course you'll have to change ListA! & ListB! by the names of your sheets.