mysql - mysql每月用户数

Question

我有一个带有字段架构的 mysql 数据库

用户名，时间戳

其中时间戳是上次活动的日期。

我想在 mysql 中构建一个查询，它将为我提供按月分解的特定用户的记录数。

谢谢。

Answer 1

Select count(*) as counta, DATE_FORMAT(timestamp, "%Y-%m") as "_month" 
from users    
where username='YOUR_USER_NAME'
group by _month
order by _month

对于 unix 时间戳，使用 FROM_UNIXTIME

SELECT count(*) as counta, DATE_FORMAT(FROM_UNIXTIME(timestamp), "%Y-%m") as "_month"
from users    
where username='YOUR_USER_NAME'
group by _month
order by _month

Answer 2

您的问题是以每月用户数的形式发布的，但我认为您的意思是给定用户每月的记录数。您想要的查询是：

Select CAST(CONCAT(YEAR(`timestamp`),'-',MONTH(`timestamp)) AS CHAR) as `month`, COUNT(*) as `hits` FROM db.table WHERE `username`='<the_username>'  GROUP BY `month`;