586. Customer Placing the Largest Number of Orders mysql

https://leetcode.com/problems/customer-placing-the-largest-number-of-orders/?envType=study-plan&id=sql-i 

Customer Placing the Largest Number of Orders - LeetCode

select customer_number 
from 
(select customer_number, count(order_number) as cnt from orders group by customer_number) tb order by tb.cnt desc limit 1;