SQL101 检索每个顾客的名称和所有的订单号(一)
描述
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');
复制输出:
an|a5 andy|a1 ben|a2 hex|a7 tom|a4 tony|a3
复制
《SQL必知必会(第5版)》独家授权
答案
进行简单的内联,然后根据名称进行排序即可
select t1.cust_name,t2.order_num
from Customers t1
inner join Orders t2 on t1.cust_id=t2.cust_id
order by t1.cust_name asc