使用Mysql语句查询一天中每个小时数据的数量统计

sql语句

SELECT HOUR
	( e.create_time ) AS HOUR,
	count( * ) AS Count 
FROM
	sale_order e 
WHERE
	e.create_time between '2018-09-26'  and '2018-09-27' 
GROUP BY
	HOUR ( e.create_time ) 
ORDER BY
	HOUR ( e.create_time );

结果：
每个小时内卖出的订单总数

Mysql 查询一天中每半小时记录的数量

SELECT HOUR(e.time)as Hour,FLOOR(MINUTE(e.time)/30) as M, COUNT(*) as Count FROM error_log e WHERE e.date = '2017-09-02' GROUP BY FLOOR(MINUTE(e.time)/30),HOUR(e.time) ORDER BY Hour(e.time);

floor函数是mysql 的向下取整函数 如 floor(1.2) = 1