mysql如何获取规定时间段内的统计数据的代码详解

mysql 获取规定时间段内的统计数据

按年统计

SELECT 
 count(*), 
 DATE_FORMAT(order_info.create_time, '%Y-%m-%d') AS count_by_date 
FROM 
 order_info 
WHERE 
 DATE_FORMAT(order_info.create_time, '%Y') = '2017' 
GROUP BY 
 count_by_date 
ORDER BY NULL

按月统计

SELECT 
 count(*), 
 DATE_FORMAT(order_info.create_time, '%Y-%m-%d') AS count_by_date 
FROM 
 order_info 
WHERE 
 DATE_FORMAT(order_info.create_time, '%Y-%m') = '2017-04' 
GROUP BY 
 count_by_date 
ORDER BY NULL

具体变换可以自己根据需求变更