Sql 选择GPA高于课程和专业平均GPA的学生姓名

我有桌子“学生”：

我如何选择那些GPA高于其课程和专业平均GPA的学生的名字

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非常感谢

像这样的事情应该行得通。在这里，我们计算每门课程和专业的平均数，加入学生并从那里过滤

Select s.name
from students s
inner join
(Select course, speciality, avg(gpa) as avg_gpa from students
group by course, speciality) a
on a.course = s.course and a.speciality = s.speciality
where s.gpa > a.avg_gpa

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欢迎来到Stackoverflow。请展示您所做的尝试，以便我们能更好地提供帮助。还有，看看这个，这正是我需要的。谢谢，有人想解释投票失败的原因吗？答案被认为是正确的。

Select s.name
from students s
inner join
(Select course, speciality, avg(gpa) as avg_gpa from students
group by course, speciality) a
on a.course = s.course and a.speciality = s.speciality
where s.gpa > a.avg_gpa

SELECT name 
FROM student s
INNER JOIN ( 
    SELECT course , speciality , AVG(gpa) gpa
    FROM student
    GROUP BY course , speciality
) a ON s.course = a.course AND s.speciality = a.speciality
WHERE s.gpa > a.gpa