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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,
`wc_id` integer unsigned NOT NULL,
`door_open` boolean NOT NULL,
`light` tinyint unsigned NOT NULL,
`temps` datetime NOT NULL
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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INSERT INTO `test` (`id`,`wc_id`,`door_open`,`light`,`temps`) VALUES
(138, 0, 1, 64, '2018-10-10 12:28:51'),
(139, 0, 0, 58, '2018-10-10 12:34:00'),
(140, 0, 0, 54, '2018-10-10 12:34:38'),
(141, 0, 1, 68, '2018-10-10 12:35:11'),
(142, 0, 1, 3, '2018-10-10 12:35:36'),
(143, 0, 0, 60, '2018-10-10 12:37:56'),
(144, 0, 0, 60, '2018-10-10 12:37:57'),
(145, 0, 0, 57, '2018-10-10 12:38:30'),
(146, 0, 1, 65, '2018-10-10 12:43:53'),
(147, 0, 1, 3, '2018-10-10 12:44:17'),
(148, 0, 0, 63, '2018-10-10 13:10:55'),
(149, 0, 0, 59, '2018-10-10 13:11:16'),
(150, 0, 1, 71, '2018-10-10 13:12:09'),
(151, 0, 1, 4, '2018-10-10 13:12:14'),
(152, 0, 1, 1, '2018-10-10 13:15:07'),
(153, 0, 0, 62, '2018-10-10 13:17:18'),
(154, 0, 0, 58, '2018-10-10 13:18:01'),
(155, 0, 1, 68, '2018-10-10 13:19:20'),
(156, 0, 1, 3, '2018-10-10 13:19:56'),
(157, 0, 1, 42, '2018-10-10 13:26:41'),
(158, 0, 0, 63, '2018-10-10 13:26:44'),
(159, 0, 0, 58, '2018-10-10 13:27:39'),
(160, 0, 1, 71, '2018-10-10 13:27:40'),
(161, 0, 1, 3, '2018-10-10 13:28:37')
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select * from `test`
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+-----+-------+-----------+-------+---------------------+
| id | wc_id | door_open | light | temps |
+-----+-------+-----------+-------+---------------------+
| 138 | 0 | 1 | 64 | 2018-10-10 12:28:51 |
| 139 | 0 | 0 | 58 | 2018-10-10 12:34:00 |
| 140 | 0 | 0 | 54 | 2018-10-10 12:34:38 |
| 141 | 0 | 1 | 68 | 2018-10-10 12:35:11 |
| 142 | 0 | 1 | 3 | 2018-10-10 12:35:36 |
| 143 | 0 | 0 | 60 | 2018-10-10 12:37:56 |
| 144 | 0 | 0 | 60 | 2018-10-10 12:37:57 |
| 145 | 0 | 0 | 57 | 2018-10-10 12:38:30 |
| 146 | 0 | 1 | 65 | 2018-10-10 12:43:53 |
| 147 | 0 | 1 | 3 | 2018-10-10 12:44:17 |
| 148 | 0 | 0 | 63 | 2018-10-10 13:10:55 |
| 149 | 0 | 0 | 59 | 2018-10-10 13:11:16 |
| 150 | 0 | 1 | 71 | 2018-10-10 13:12:09 |
| 151 | 0 | 1 | 4 | 2018-10-10 13:12:14 |
| 152 | 0 | 1 | 1 | 2018-10-10 13:15:07 |
| 153 | 0 | 0 | 62 | 2018-10-10 13:17:18 |
| 154 | 0 | 0 | 58 | 2018-10-10 13:18:01 |
| 155 | 0 | 1 | 68 | 2018-10-10 13:19:20 |
| 156 | 0 | 1 | 3 | 2018-10-10 13:19:56 |
| 157 | 0 | 1 | 42 | 2018-10-10 13:26:41 |
| 158 | 0 | 0 | 63 | 2018-10-10 13:26:44 |
| 159 | 0 | 0 | 58 | 2018-10-10 13:27:39 |
| 160 | 0 | 1 | 71 | 2018-10-10 13:27:40 |
| 161 | 0 | 1 | 3 | 2018-10-10 13:28:37 |
+-----+-------+-----------+-------+---------------------+
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select id,
wc_id,
door_open,
light,
temps
from ( select @i:=if (door_open=@p,0,1) as flag,
@p:=`door_open` as prec,
id,
wc_id,
door_open,
light,
temps
from test
cross join ( SELECT @i:=0,@p:='') as y
having flag = 1
) as x
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+-----+-------+-----------+-------+---------------------+
| id | wc_id | door_open | light | temps |
+-----+-------+-----------+-------+---------------------+
| 138 | 0 | 1 | 64 | 2018-10-10 12:28:51 |
| 139 | 0 | 0 | 58 | 2018-10-10 12:34:00 |
| 141 | 0 | 1 | 68 | 2018-10-10 12:35:11 |
| 143 | 0 | 0 | 60 | 2018-10-10 12:37:56 |
| 146 | 0 | 1 | 65 | 2018-10-10 12:43:53 |
| 148 | 0 | 0 | 63 | 2018-10-10 13:10:55 |
| 150 | 0 | 1 | 71 | 2018-10-10 13:12:09 |
| 153 | 0 | 0 | 62 | 2018-10-10 13:17:18 |
| 155 | 0 | 1 | 68 | 2018-10-10 13:19:20 |
| 158 | 0 | 0 | 63 | 2018-10-10 13:26:44 |
| 160 | 0 | 1 | 71 | 2018-10-10 13:27:40 |
+-----+-------+-----------+-------+---------------------+
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COMMIT
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SET AUTOCOMMIT = 1
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