# 方法一：使用简单的等联结语法
# select c.cust_name, o.order_num
# from Customers c, Orders o
# where c.cust_id = o.cust_id
# order by c.cust_name asc

# 方法二：使用inner join
select c.cust_name, o.order_num
from 
    Customers c inner join Orders o 
    on c.cust_id = o.cust_id
order by c.cust_name asc