统计选修了a001课程的学生的平均成绩()
统计选修了a001课程的学生的平均成绩()
A.select cid,avg(grade) from student where cid=’a001’ group by cid
B.select cid,avg(grade) from student group by cid having cid=’a001’
C.select cid,avg(grade) from sc where cid=’a001’ group by cid
D.select cid,avg(grade) from course where cid=’a001’ group by cid
正确答案:select cid,avg(grade) from sc where cid=’a001’ group by cid
Tag:SqlServer数据库原理与应用 成绩 课程
时间:2023-12-26 10:57:50