I am creating a new database that have multiple tables I want to import different excel sheets of information to multiple tables within the database example masterpart table , customertable related to master parttable, customertable is related to customerstoretable.

In summary I supply a part customer assigns their master part number and each store assigns their own internal part number.

Any ideas.
I have created the tables I need to know the best way to put info from the excel sheets into the tables, each sheet contains info that belongs in different tables