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| --------------
SET AUTOCOMMIT = 0
--------------
--------------
START TRANSACTION
--------------
--------------
DROP DATABASE IF EXISTS `base`
--------------
--------------
CREATE DATABASE `base`
DEFAULT CHARACTER SET `latin1`
DEFAULT COLLATE `latin1_general_ci`
--------------
--------------
DROP TABLE IF EXISTS `test`
--------------
--------------
CREATE TABLE `test`
(
`id` integer unsigned NOT NULL,
`col` integer unsigned NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
--------------
--------------
INSERT INTO `test` (`id`,`col`) VALUES
(1, NULL), (2, 35), (3, 4), (4, NULL)
--------------
--------------
select * from `test`
--------------
+----+------+
| id | col |
+----+------+
| 1 | NULL |
| 2 | 35 |
| 3 | 4 |
| 4 | NULL |
+----+------+
--------------
select id, sum(coalesce(col, 1000)) as total
from `test`
having total = 2039
--------------
+----+-------+
| id | total |
+----+-------+
| 1 | 2039 |
+----+-------+
--------------
DROP TABLE IF EXISTS `recidives`
--------------
--------------
CREATE TABLE `recidives`
(
`id` integer unsigned NOT NULL,
`qui` char(4) NOT NULL,
`debut` date NULL,
`fin` date NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
--------------
--------------
INSERT INTO `recidives` (`id`,`qui`,`debut`,`fin`) VALUES
(1, 'toto', '2015-02-01', '2015-03-01'),
(2, 'toto', '2014-12-12', NULL),
(3, 'tutu', '2010-05-06', '2013-08-01'),
(4, 'tata', NULL, '2015-12-31')
--------------
--------------
select * from `recidives`
--------------
+----+------+------------+------------+
| id | qui | debut | fin |
+----+------+------------+------------+
| 1 | toto | 2015-02-01 | 2015-03-01 |
| 2 | toto | 2014-12-12 | NULL |
| 3 | tutu | 2010-05-06 | 2013-08-01 |
| 4 | tata | NULL | 2015-12-31 |
+----+------+------------+------------+
--------------
SELECT id, qui, SUM(datediff(coalesce(fin,now()), coalesce(debut,now()))) as val
FROM recidives
group by id
order by id
--------------
+----+------+------+
| id | qui | val |
+----+------+------+
| 1 | toto | 28 |
| 2 | toto | 255 |
| 3 | tutu | 1183 |
| 4 | tata | 129 |
+----+------+------+
--------------
SELECT qui, SUM(datediff(coalesce(fin,now()), coalesce(debut,now()))) as val
FROM recidives
group by qui
order by qui
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+------+------+
| qui | val |
+------+------+
| tata | 129 |
| toto | 283 |
| tutu | 1183 |
+------+------+
--------------
SELECT qui, SUM(datediff(coalesce(fin,now()), coalesce(debut,now()))) as val
FROM recidives
group by qui
having val between 365 and 1460
order by qui
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+------+------+
| qui | val |
+------+------+
| tutu | 1183 |
+------+------+
--------------
COMMIT
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SET AUTOCOMMIT = 1
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