mysql 获取规定时间段内的统计数据

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

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来源：http://blog.csdn.net/smile_miracle/article/details/69961185