leetcode刷题MySQL题解二十四

Posted 2022-05-17 hhh江月

leetcode刷题mysql题解二十四

题目叙述

表: Orders

±----------------±---------+
| Column Name | Type |
±----------------±---------+
| order_number | int |
| customer_number | int |
±----------------±---------+
Order_number是该表的主键。
此表包含关于订单ID和客户ID的信息。

编写一个SQL查询，为下了 最多订单 的客户查找 customer_number 。

测试用例生成后， 恰好有一个客户 比任何其他客户下了更多的订单。

题目解答

# Write your MySQL query statement below
# select count(customer_number) as customer_number  from Orders;
# Write your MySQL query statement below
SELECT
    customer_number
FROM
    orders
GROUP BY customer_number
ORDER By COUNT(*) desc
LIMIT 1;

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