题解 | #出现三次以上相同积分的情况#
出现三次以上相同积分的情况
http://www.nowcoder.com/practice/c69ac94335744480aa50646864b7f24d
SELECT
e.number
FROM
(
SELECT
number, count(number) as cnt
FROM
grade
GROUP BY
number
) e
WHERE
e.cnt >= 3; 
