MYSQL按照一天的每个小时统计数据要怎么写 比如统计八点到九点 九点到十点等等

select to_char((trunc(sysdate)+trunc((日期-trunc(sysdate))*24)/24),'hh24') ||'-'||to_char((trunc(sysdate)+trunc((日期-trunc(sysdate))*24+1)/24),'hh24') 时间段, avg(统计字段平均值),sum(统计字段和),count(*) "字段条数"from 表名where trunc(日期)=to_date(&day,'yyyymmdd') group by to_char((trunc(sysdate)+trunc((日期-trunc(sysdate))*24)/24),'hh24')||'-'|| to_char((trunc(sysdate)+trunc((日期-trunc(sysdate))*24+1)/24),'hh24') order by 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

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