MySQL中统计一天之内每个时间段内的数据，很急

Question

有两个表
表一：粉丝表Fans

表二：粉丝统计表Fanstrack

要求
Fanstrack 统计 从fans表里面拿取数据
Total （subscribe=1）的所有的粉丝数据的总和
New （subscribe=1） 所有新增粉丝数据的总和
outflow （subscribe=0） 所有流失流失粉丝数据的总和
net 用new - outflow 净增粉丝的总和

（subscribe=1）关注的粉丝
（subscribe=0）取消关注的粉丝
（uid） 被关注的对象
按时间段（两个小时一个时间段）进行统计，定时插入到粉丝统计表里面，如果按天统计的话，通过存储过程和定时器可以实现，我这里有个sql语句
INSERT INTO yht_fanstrack(total,new,outflow,net,time,uid)
SELECT c.total,a.new,b.outflow,(a.new-b.outflow) AS net,a.time,a.uid FROM
(SELECT now() AS time,COUNT(subscribe_time) AS new,uid FROM yht_fans WHERE subscribe_time>=UNIX_TIMESTAMP(CURDATE()) and subscribe_time<=UNIX_TIMESTAMP(CURDATE())+86400 GROUP BY uid) a
JOIN
(SELECT now() AS time,COUNT(cancel_time) AS outflow,uid FROM yht_fans WHERE cancel_time>=UNIX_TIMESTAMP(CURDATE()) and cancel_time<=UNIX_TIMESTAMP(CURDATE())+86400 GROUP BY uid) b
ON
a.uid=b.uid
JOIN
(SELECT COUNT(subscribe) AS total,uid FROM yht_fans GROUP BY uid) c
ON
a.uid=c.uid
现在的问题是，按时间段先用sql语句把数据统计出来，然后每天定时自动插入，不知道如何实现。
有没哪位大神给个思路，或者写个实现方案，小弟在此谢过了！！！

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

Answer 2

@param pay_time数据库时间戳字段
@param price_transaction数据库价格字段
$date = '2018-09-21';
$sql = "
SELECT
HOUR (FROM_UNIXTIME(pay_time)) AS Hour,
sum(price_transaction) as sum
FROM
zt_order
WHERE
FROM_UNIXTIME(pay_time, '%Y-%m-%d') = '$date'
GROUP BY
HOUR (FROM_UNIXTIME(pay_time))
ORDER BY
HOUR (FROM_UNIXTIME(pay_time))
";
$query = $this->db->query($sql);
$data = $query->result_array();
返回每个小时对应的和
不足的地方在于如果该时间段数据为0,则不返回数据