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题解 | 获取当前薪水第二多的员工的emp_no以及其对应的薪水salary

select emp_no, salary from (select emp_no, salary, rank()over(order by salary desc) as r from salaries ) a where r = 2 order by emp_no asc;

2025-09-06

0 21

题解 | 统计出当前各个title类型对应的员工当前薪水对应的平均工资

select title, avg(salary) as avg from titles t join salaries s on t.emp_no = s.emp_no group by title order by avg asc;

2025-09-06

0 22

题解 | 查找employees表emp_no与last_name的员工信息

select emp_no, birth_date, first_name, last_name, gender, hire_date from employees where emp_no % 2 = 1 and last_name <> 'Mary' order by hire_da...

2025-09-06

0 20

题解 | 获取每个部门中薪水最高的员工相关信息

select dept_no, emp_no, salary from ( select dept_no, de.emp_no, salary, row_number()over(partition by dept_no order by salary de...

2025-09-06

0 24

题解 | 获取所有员工当前的manager

select de.emp_no, dm.emp_no as manager from dept_emp as de inner join dept_manager as dm on de.dept_no = dm.dept_no where de.to_date = '9999-01-01' a...

2025-09-06

0 17

题解 | 获取所有非manager的员工emp_no

select emp_no from employees where emp_no not in ( select emp_no from dept_manager )

2025-09-03

0 14

题解 | 找出所有员工当前薪水salary情况

select distinct salary from salaries order by salary desc;

2025-09-03

0 23

题解 | 查找薪水记录超过15条的员工号emp_no以及其对应的记录次数t

select emp_no, count(*) as t from salaries group by emp_no having count(*) > 15

2025-09-03

0 14

题解 | 查找所有员工的last_name和first_name以及对应部门编号dept_no

select last_name, first_name, dept_no from employees e left join dept_emp de on de.emp_no = e.emp_no

2025-09-03

0 15

题解 | 查找所有已经分配部门的员工的last_name和first_name以及dept_no

select last_name, first_name, dept_no from dept_emp de left join employees e on e.emp_no = de.emp_no

2025-09-03

0 15