题解 | #近三个月未完成试卷数为0的用户完成情况#
近三个月未完成试卷数为0的用户完成情况
https://www.nowcoder.com/practice/4a3acb02b34a4ecf9045cefbc05453fa
select
uid,
count(score) as exam_complete_cnt
from (
select
*,
dense_rank() over(partition by uid order by date_format(start_time,'%Y%m') desc) ranking
from exam_record
)t
where ranking <=3
group by uid
having count(ranking) = count(score)
order by exam_complete_cnt desc,uid desc