列出工資低於公司平均值但工程總工時超過100的員工的名稱

Question

因此，我試圖找出我的教授給我的這個問題，而且我似乎無法獲得代碼。事關我的嘗試。僱員表有僱員​​信息，如工資，而workon表中有關於時間的項目，我有現在的代碼是 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

也許像這：

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; 

Answer 2

試試這一個方面的信息：

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