题解 | #统计作答次数#
统计作答次数
https://www.nowcoder.com/practice/45a87639110841b6950ef6a12d20175f
select count(uid) as total_pv,count(submit_time) as complete, count(distinct if(submit_time is not null,exam_id,null)) as complete_exam_cnt from exam_record
统计作答次数
https://www.nowcoder.com/practice/45a87639110841b6950ef6a12d20175f
select count(uid) as total_pv,count(submit_time) as complete, count(distinct if(submit_time is not null,exam_id,null)) as complete_exam_cnt from exam_record
相关推荐