CREATE TABLE customers (customer_name VARCHAR(255), customer_id VARCHAR(255)); CREATE TABLE customers_policies (customer_id VARCHAR(255))
What is the name of the customer who has the most policies listed?
    
SQL: SELECT t1.customer_name FROM customers AS t1 JOIN customers_policies AS t2 ON t1.customer_id = t2.customer_id GROUP BY t1.customer_name ORDER BY COUNT(*) DESC LIMIT 1