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, PRIMARY KEY (`order_number`)) ENGINE=InnoDB DEFAULT CHARSET=latin1;INSERT INTO `orders` VALUES ('1', '1');INSERT INTO `orders` VALUES ('2', '2');INSERT INTO `orders` VALUES ('3', '3');INSERT INTO `orders` VALUES ('4', '3');