题解 | #计算用户8月每天的练题数量#
计算用户8月每天的练题数量
https://www.nowcoder.com/practice/847373e2fe8d47b4a2c294bdb5bda8b6
SELECT day(date) AS day, COUNT(question_id) AS question_cnt FROM question_practice_detail WHERE year(date)=2021 AND month(date) = 8 GROUP BY date;
猛猛地学了一遍黑马的sql课程，现在基本对着笔记都能把题写出来
唯一忘了的是from、where和group by的顺序
