Filtering two tables in one sheet

Hi.
Im currently working with updating some codes. To do this, I have two tables with two columns each, looking like this:

Old code Old description New code New description
111111 test test 22222222 test test test

To update the code, the desriptions must describe the same object, but dont have to match.
Im wondering if there is any way I can filter out only new description (and new codes), showing all fields in the old description and old codes?
I know I can make two sheets, but it would mean less work if I could work on only one sheet.

Regards
Joachim