19-9-30(数据库)

Posted 2022-12-07 newliu

https://leetcode-cn.com/problems/customers-who-never-order/

从不订购的客户

select Customers.Name as Customers from Customers where Customers.Id not in (select Orders.CustomerId from Orders);

个人理解：作为一个sql入门白痴，not in是个好东西