单选题

有保存学生的课程分数的表STU_SCORE，STU_ID为学号，SCORE...

Question

有保存学生的课程分数的表STU_SCORE，STU_ID为学号，SCORE为分数，
以下哪个不能计算出学生的课程平均分

A. SELECT STU_ID, AVG(SCORE) FROM STU_SCORE GROUP BY STU_ID

B. SELECT STU_ID, AVG(SCORE) FROM STU_SCORE GROUP BY STU_ID ORDER BY STU_ID

C. SELECT STU_ID, SUM(SCORE)/COUNT(STU_ID) FROM STU_SCORE GROUP BY STU_ID

D. SELECT STU_ID, AVG(SCORE)/COUNT(STU_ID) FROM STU_SCORE GROUP BY STU_ID