You have two tables of customers in your database. Customers in cust_table_1 were sent an e- mail promotion last year, and customers in cust_table_2 received a newsletter last year. Customers can…

You have two tables of customers in your database. Customers in cust_table_1 were sent an e- mail promotion last year, and customers in cust_table_2 received a newsletter last year. Customers can only be entered in once per table. You want to create a table that includes all customers, and any of the communications they received last year. Which type of join would you use for this table?