检索每个顾客的名称和所有的订单号（sql练习）

Customers表代表顾客信息含有顾客id cust_id和 顾客名称 cust_name

cust_id	cust_name
cust10	andy
cust1	ben
cust2	tony
cust22	tom
cust221	an
cust2217	hex

Orders表代表订单信息含有订单号order_num和顾客id cust_id

order_num	cust_id
a1	cust10
a2	cust1
a3	cust2
a4	cust22
a5	cust221
a7	cust2217

【问题】使用 INNER JOIN 编写 SQL语句，检索每个顾客的名称（Customers表中的 cust_name）和所有的订单号（Orders 表中的 order_num），最后根据顾客姓名cust_name升序返回。

【示例结果】返回顾客名称cust_name和订单号order_num

cust_name	order_num
an	a5
andy	a1
ben	a2
hex	a7
tom	a4
tony	a3

示例1

输入：

DROP TABLE IF EXISTS `Customers`;
CREATE TABLE IF NOT EXISTS `Customers`(
	cust_id VARCHAR(255) NOT NULL COMMENT '客户id',
	cust_name VARCHAR(255) NOT NULL COMMENT '客户姓名'
);
INSERT `Customers` VALUES ('cust10','andy'),('cust1','ben'),('cust2','tony'),('cust22','tom'),('cust221','an'),('cust2217','hex');

DROP TABLE IF EXISTS `Orders`;
CREATE TABLE IF NOT EXISTS `Orders`(
  order_num VARCHAR(255) NOT NULL COMMENT '商品订单号',
  cust_id VARCHAR(255) NOT NULL COMMENT '顾客id'
);
INSERT `Orders` VALUES ('a1','cust10'),('a2','cust1'),('a3','cust2'),('a4','cust22'),('a5','cust221'),('a7','cust2217');

输出：

an|a5
andy|a1
ben|a2
hex|a7
tom|a4
tony|a3

select
    cust_name,
    order_num
from
    Customers
inner join
    Orders
on Customers.cust_id=Orders.cust_id
order by
    cust_name;