题解 | #月总刷题数和日均刷题数#
月总刷题数和日均刷题数
https://www.nowcoder.com/practice/f6b4770f453d4163acc419e3d19e6746
select date_format(submit_time,'%Y%m') submit_month,count(*) month_q_cnt,round(count(*)/any_value(day(last_day(submit_time))),3) avg_day_q_cnt from practice_record where year(submit_time)=2021 group by submit_month union select '2021汇总',count(*),round(count(*)/any_value(day(last_day(submit_time))),3) avg_day_q_cnt from practice_record where year(submit_time)=2021 order by submit_month;
