sql - 列出工资低于公司平均水平但项目总工时超过100小时的员工姓名

Question

所以我试图弄清楚我的教授给我的这个问题，无论我尝试什么，我似乎都无法正确获取代码。员工表有员工信息，比如薪水，而工作表有关于项目小时数的信息我现在的代码是 select e.name from employee e, workon w where e.empid = w.empid and e.name in (select name from employee having salary < avg (salary) and empid in (select empid from workon having sum (hours) > 100)) group by e.name

Answer 1

试试这个：

SELECT name FROM employee WHERE salary < (SELECT AVG(salary) FROM employee) having sum(hours) > 100 GROUP BY name;

Answer 2

也许是这样的：

select
  e.name
from
  employee e
  inner join workon wo on e.employee = wo.employee
where
  e.salary < (select avg(salary) from employee)
  and sum(wo.hours) > 100
group by
  e.name;