查询score中选学多门课程的同学中分数为非最高分成绩的记录。

20、查询score中选学多门课程的同学中分数为非最高分成绩的记录。

SELECT * 
FROM  (SELECT * 
       FROM SCORE 
       WHERE DEGREE not in (SELECT MAX(DEGREE) DEGREE FROM SCORE group by CNO)) t1

WHERE SNO NOT IN (SELECT  SNO 
                  FROM SCORE 
                  GROUP BY SNO
                  HAVING  COUNT(SNO)<=1)
ORDER BY SNO ASC