关于sql按天统计

year是你的条件

SELECT YEAR, (SELECT COUNT(*) FROM A GROUP BY TO_CHAR(date, 'yyyy')

FROM xxx

不过这样，2005对应的结果为0。。。

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

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