mysql – Importing new db structure from dev site over older db structure using phpmyadmin

I have a site where the db structure is one way and I have a developer that provided me a copy of a database without data only the old db structure with new tables and fields added.

Using phpmyadmin how do I import the new db file so that it will allow the file to complete the import and add the new missing tables and fields that are in the new db?

I can not locate any setting to apply prior to import.

Thanks ahead of time for any help or direction to solve my problem.

Thank you