SQl练习 2022/6/29

175. 组合两个表

题干
代码思路

1. join连接

select a.name as  Employee
from employee a left join employee b
on a.managerId=b.id
where a.salary>b.salary

181. 超过经理收入的员工

题干
代码思路

1. join子句

select a.name as  Employee
from employee a left join employee b
on a.managerId=b.id
where a.salary>b.salary

2. where子句

select a.name as  Employee
from employee a,employee b
where a.managerId=b.id and a.salary>b.salary