按照学号进行分组,统计学生的平均成绩,且平均分按降序排列


按照学号进行分组,统计学生的平均成绩,且平均分按降序排列

A.select sid, avg(grade) from sc group by sid order by avg(grade) desc

B.select sid, avg(grade) from student group by sid order by avg(grade) desc

C.select sid, avg(grade) from student group by cid order by avg(grade)

D.select sid, avg(grade) from sc group by cid order by avg(grade) desc

正确答案:select sid, avg(grade) from sc group by sid order by avg(grade) desc


Tag:SqlServer数据库原理与应用 学号 排列 时间:2023-12-26 10:57:52