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SET AUTOCOMMIT = 0
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START TRANSACTION
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DROP DATABASE IF EXISTS `base`
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CREATE DATABASE `base`
DEFAULT CHARACTER SET `latin1`
DEFAULT COLLATE `latin1_general_ci`
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DROP TABLE IF EXISTS `test`
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CREATE TABLE `test`
( `id` integer unsigned not null auto_increment primary key,
`clef` char(05) not null,
`type` tinyint unsigned not null,
`periode` datetime not null
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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insert into `test` (`clef`,`type`,`periode`) values
('OP1', 1, '2017-04-20 23:45:00'),
('OP1', 2, '2017-04-21 02:00:00'),
('OP2', 1, '2017-04-21 10:45:00'),
('OP2', 2, '2017-04-22 11:00:00'),
('OP3', 1, '2017-04-23 09:00:00'),
('OP3', 2, '2017-04-23 15:00:00')
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select * from `test`
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+----+------+------+---------------------+
| id | clef | type | periode |
+----+------+------+---------------------+
| 1 | OP1 | 1 | 2017-04-20 23:45:00 |
| 2 | OP1 | 2 | 2017-04-21 02:00:00 |
| 3 | OP2 | 1 | 2017-04-21 10:45:00 |
| 4 | OP2 | 2 | 2017-04-22 11:00:00 |
| 5 | OP3 | 1 | 2017-04-23 09:00:00 |
| 6 | OP3 | 2 | 2017-04-23 15:00:00 |
+----+------+------+---------------------+
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select t1.clef,
t1.periode as debut,
t2.periode as fin,
timediff(t2.periode, t1.periode) duree
from test as t1
inner join test as t2
on t2.clef = t1.clef
and t2.id > t1.id
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+------+---------------------+---------------------+----------+
| clef | debut | fin | duree |
+------+---------------------+---------------------+----------+
| OP1 | 2017-04-20 23:45:00 | 2017-04-21 02:00:00 | 02:15:00 |
| OP2 | 2017-04-21 10:45:00 | 2017-04-22 11:00:00 | 24:15:00 |
| OP3 | 2017-04-23 09:00:00 | 2017-04-23 15:00:00 | 06:00:00 |
+------+---------------------+---------------------+----------+
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COMMIT
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SET AUTOCOMMIT = 1
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