Now let’s make it a bit more challenging. Update the previous challenge to return the customer email (cust_email in the Customers table) for any customers who purchased item with a prod_id of BR01. Hint, this involves the SELECT statement, the innermost one returning order_num from OrderItems, and the middle one returning cust_id from Orders.

SELECT cust_email FROM Customers
WHERE cust_id IN (SELECT cust_id
                  FROM Orders
                  WHERE order_num IN (SELECT order_num
                                      FROM OrderItems
                                      WHERE prod_id = 'BR01'));

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