Question

好吧，这是我需要回答的问题：哪个部门/专业的平均GPA最高？

我对SQL很新，实际上我现在只做了3个星期。我有平均GPA最高的答案，但我想知道如何让它显示主要和gpa，而不仅仅是gpa。

    select max (avg_gpa)
    from (select major, avg(gpa) AS avg_gpa
    from lab5_student
    group by major);

感谢您对此有任何见解！

专利

Answer 1

将主要列添加到select语句中，如下所示：

  select major, max (avg_gpa)
    from (select major, avg(gpa) AS avg_gpa
    from lab5_student
    group by major);

这应该有效。

Answer 2

Select y.* from
(
 SELECT MAX(avg_gpa) as max_avg_gpa
 FROM (
       SELECT major,AVG(gpa) AS avg_gpa
       FROM lab5_student
       GROUP BY major
      )v
 )x
 inner join

(
       SELECT major,AVG(gpa) AS avg_gpa
       FROM lab5_student
       GROUP BY major
)y
on x.max_avg_gpa=y.avg_gpa

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最大平均gpa sql

2 个答案: