SCHEMA:
CREATE TABLE customers (customer_name VARCHAR, customer_id VARCHAR); CREATE TABLE customers_policies (customer_id VARCHAR)
USER:
What is the name of the customer who has the most policies listed?

QUERY:
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