LeetCode - 586. Customer Placing the Largest Number of Orders (MySQL)

Easy, SQL - GROUP BY

RunTime : 501 ms

문제

Write a solution to find the customer_number for the customer who has placed the largest number of orders.

The test cases are generated so that exactly one customer will have placed more orders than any other customer.

The result format is in the following example.

풀이

• 단순하게 가장 많이 나온 걸 찾는 문제

SELECT customer_number FROM Orders
GROUP BY customer_number
ORDER BY COUNT(customer_number) DESC
LIMIT 1