大家好，我是考100分的小小码 ，祝大家学习进步，加薪顺利呀。今天说一说mysql统计,希望您对编程的造诣更进一步.
-- 时间转任意格式DATE_FORMAT
-- #select DATE_FORMAT(NOW(),"%m-%d-%Y");
-- unix_timestamp 时间转时间戳
-- select unix_timestamp(now());
-- from_unixtime 时间戳转时间
-- SELECT from_unixtime(created_time,"%m-%d-%Y")
#按天统计
-- SELECT from_unixtime(created_time,"%m-%d-%Y") AS date, COUNT(*) AS num
-- FROM filter_ip
-- GROUP BY date
-- ORDER BY date;
#按小时统计
-- SELECT from_unixtime(created_time, "%Y-%m-%d %H:00:00") AS time, COUNT(*) AS num
-- FROM filter_ip
-- GROUP BY time
-- ORDER BY time;
#按分钟统计
-- SELECT DATE_FORMAT(from_unixtime(created_time), "%Y-%m-%d %H:%i:00") AS time, COUNT(*) AS num
-- FROM filter_ip
-- GROUP BY time
-- ORDER BY time;
#按十分钟统计、按半小时统计只需要把10改为30
SELECT time, COUNT( * ) AS num
FROM
(
SELECT
DATE_FORMAT(
concat( date( from_unixtime(created_time) ), " ", HOUR ( from_unixtime(created_time) ), ":", floor( MINUTE ( from_unixtime(created_time) ) / 10 ) * 10 ),
"%Y-%m-%d %H:%i"
) AS time
FROM filter_ip
) a
GROUP BY DATE_FORMAT( time, "%Y-%m-%d %H:%i" )
ORDER BY time;
代码100分
参考：https://blog.csdn.net/u010946448/article/details/83752984
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