Question

mysql 按时间统计用什么时间格式

Answer 1

时间段统计，可以采用 hour(subscribe_time) 取出小时然后分层。思路：
select

uid
,CASE WHEN HOUR(subscribe_time) BETWEEN 0 AND 1 THEN '00:00:00'
WHEN HOUR(subscribe_time) BETWEEN 2 AND 3 THEN '02:00:00'
...
ELSE '23:00:00' END -- 生成时间分层部分，insert前外层sql加上日期后作为唯一的时间值

,COUNT(*)
FROM yht_fans WHERE subscribe_time>=UNIX_TIMESTAMP(CURDATE()) and subscribe_time<=UNIX_TIMESTAMP(CURDATE())+86400
GROUP BY 1,2