题解 | #某乎问答单日回答问题数大于等于3个的所有用户#
某乎问答单日回答问题数大于等于3个的所有用户
http://www.nowcoder.com/practice/821e5072663f485f8204cf03b89d322a
select answer_date,author_id,count(char_len) as cnt
from answer_tb
where month(answer_date)=11
group by answer_date,author_id
having cnt>=3
order by answer_date,author_id
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