题解 | #某乎问答单日回答问题数大于等于3个的所有用户#

SELECT *
FROM(
    SELECT answer_date, author_id, COUNT(issue_id) AS answer_cnt
    FROM answer_tb
    GROUP BY answer_date, author_id
    ORDER BY answer_date, author_id) AS a
WHERE a.answer_cnt >= 3
;