【简答题】
统计出考试平均分大于70分的课程及平均分,下面查询统计语句正确的是( ) A. select 课程,avg(score) from student_score where score > 70 B. select课程,avg(score) from student_score where avg(score) > 70 C. select课程,avg(score) from student_score having avg(score) > 70 D. select课程,avg(score) from student_score group by 课程 having avg(score) > 70
参考答案:
参考解析:
举一反三