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
-- 时间限制2021年8月：WHERE date BETWEEN '2021-08-01' AND '2021-08-31'
-- 计算刷题数量：COUNT(question_id) AS question_cnt, 需要按照DAY(date)分组：GROUP BY DAY(date)
-- 返回DAY(date),question_cnt
SELECT
DAY (date) AS day,
COUNT(question_id) AS question_cnt
FROM
question_practice_detail
WHERE
date BETWEEN '2021-08-01' AND '2021-08-31'
GROUP BY
DAY (date)
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