按各科平均成绩和及格率的百分数，按及格率高到低的顺序排序

SELECT SC.COURSE_NO,ROUND(AVG(CORE),2),(SUM(CASE
              WHEN CORE BETWEEN 60 AND 100 THEN
               1
              ELSE
               0
              END)/COUNT(*))*100||'%' 及格率
FROM HAND_STUDENT_CORE SC
GROUP BY SC.COURSE_NO