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(*) exam_complete_cnt from 
(
select uid,month,submit_time from
(
select uid,month(start_time) month,submit_time,
dense_rank()over(partition by uid order by month(start_time) desc) ranking 
from exam_record
where year(start_time) = '2021'
) a
where ranking <=3
) c
where uid not in (
select uid from 
(
select uid,month,submit_time from
(
select uid,month(start_time) month,submit_time,
dense_rank()over(partition by uid order by month(start_time) desc) ranking 
from exam_record
where year(start_time) = '2021'
) a
where ranking <=3
) b
where submit_time is null
)
group by uid
order by exam_complete_cnt desc,uid desc;

全部评论

相关推荐

自由水:笑死了,敢这么面试不敢让别人说
点赞 评论 收藏
分享
评论
点赞
收藏
分享

创作者周榜

更多
牛客网
牛客网在线编程
牛客网题解
牛客企业服务