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-
