2022-12-17:订单最多的客户。以下数据,结果输出3。请问sql语句如何写?
DROP TABLE IF EXISTS `orders`;
CREATE TABLE `orders` (
`order_number` int(11) NOT NULL,
`customer_number` int(11) NOT NULL,
...
/**
* Definition for a point.
* struct Point {
* int x;
* int y;
* Point() : x(0), y(0) {}
* Point(int a, int b) : x(a), y(b) {}
* };
*/
class Solution {
public:
...
描述
Given two strings a and b we define a*b to be their concatenation. For example, if a = "abc" and b = "def" then a*b = "abcdef". If we think of concatenation as multiplication, exponentiation b...