Mysql 计算日期间隔之间的行数
我有一个表,其中有两列Mysql 计算日期间隔之间的行数,mysql,date,range,Mysql,Date,Range,我有一个表,其中有两列DATETIME列date\u start和date\u end。 现在我需要计算每个时间间隔内的发生次数,按分钟分组 样品 id date_start date_end 01 2014-01-01 08:10:28 2014-01-01 08:12:35 <-- 08:10, 08.11, 08.12 02 2014-01-01 08:10:58 2014-01-01 08:11:26 <-- 08:10,
DATETIME
列date\u start
和date\u end
。
现在我需要计算每个时间间隔内的发生次数,按分钟分组
样品
id date_start date_end
01 2014-01-01 08:10:28 2014-01-01 08:12:35 <-- 08:10, 08.11, 08.12
02 2014-01-01 08:10:58 2014-01-01 08:11:26 <-- 08:10, 08.11
03 2014-01-01 08:11:04 2014-01-01 08:12:01 <-- 08:11, 08.12
04 2014-01-01 08:11:56 2014-01-01 08:11:58 <-- 08:11
05 2014-01-01 08:12:06 2014-01-01 08:12:09 <-- 08:12
06 2014-01-01 08:14:06 2014-01-01 08:14:20 <-- 08:14
可能我需要一个临时表来存储每个间隔中的时间,以便我以后可以对它们进行分组…试试这一个,用实际的表名替换
yourtable
(2次出现yourtable
)
(此sqlfiddle包含与编辑问题之前相同的数据)
time count
2014-01-01 08:10 2
2014-01-01 08:11 4
2014-01-01 08:12 3
2014-01-01 08:14 1
SELECT DATE_FORMAT(H.hardTime,'%Y-%m-%d %H:%i') as time,
COUNT(*) as count
FROM
(SELECT DATE_FORMAT(MIN(T1.date_start),'%Y-%m-%d %H:%i:00') + INTERVAL V.value MINUTE as hardTime
FROM yourtable T1
,(SELECT T1.value+T2.value+T3.value+T4.value+T5.value+T6.value+T7.value
as value FROM
(SELECT 0 as value UNION SELECT 1)T1,
(SELECT 0 as value UNION SELECT 2)T2,
(SELECT 0 as value UNION SELECT 4)T3,
(SELECT 0 as value UNION SELECT 8)T4,
(SELECT 0 as value UNION SELECT 16)T5,
(SELECT 0 as value UNION SELECT 32)T6,
(SELECT 0 as value UNION SELECT 64)T7
)V
GROUP BY V.value
)H
INNER JOIN yourTable Y
ON H.hardTime BETWEEN DATE_FORMAT(Y.date_start,'%Y-%m-%d %H:%i:00')
AND DATE_FORMAT(Y.date_end,'%Y-%m-%d %H:%i:00')
GROUP BY H.hardTime
ORDER BY H.hardTime