题解 | 组合 Products 表中的产品名称和 Customers 表中的顾客名称

# select prod_name from Products
# union all
# select cust_name as prod_name from Customers
# order by prod_name ASC;


# select prod_name from Products
# union all
# select cust_name from Customers
# order by 1 ASC;


select prod_name from Products
union all
select cust_name from Customers
order by prod_name ASC;