如何找到拥有最活跃卖家(每个用户每天软件销售量最高)的团队? 我想做类似这样的查询,但感觉不太安静
SELECT users.team_id, count(*) as sales FROM users
INNER JOIN activity ON users.user_id = activity.user_id
WHERE activity.sales = software
GROUP BY users.team_id
ORDER BY sale DESC
我的用户表如下所示:
user_id team_id
0 62
1 32
2 21
虽然我的事件表如下所示:
user_id sale_date sale
1 2019-05-02 11:02:39 hardware
2 2018-05-02 11:02:53 software
2 2019-06-02 11:42:33 software
最佳答案
听起来这是一个逐步查询,所以让我们从最里面的部分开始:获取每个用户每天的销售计数。
SELECT sale_date, user_id, count(*) as sales
WHERE sale = 'software'
GROUP BY sale_date, user_id
然后我们就可以get the most active user for each day :
SELECT DISTINCT ON (sale_date) sale_date, user_id
FROM (
SELECT sale_date, user_id, count(*) as sales
WHERE sale = 'software'
GROUP BY sale_date, user_id
) AS counts_by_date_and_user
ORDER BY sale_date, sales -- consider breaking ties somehow
然后我们可以计算用户当天最活跃的频率,按此排序,并获取他们的团队 ID。
SELECT team_id, user_id, count(*) as days
FROM (
SELECT DISTINCT ON (sale_date) sale_date, user_id
FROM (
SELECT sale_date, user_id, count(*) as sales
WHERE sale = 'software'
GROUP BY sale_date, user_id
) AS counts_by_date_and_user
ORDER BY sale_date, sales -- consider breaking ties somehow
) AS most_active
JOIN users USING (user_id)
GROUP BY user_id
ORDER BY days DESC
关于sql - 如何找到拥有最活跃卖家(每个用户每天软件销售量最高)的团队?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/61030520/