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START TRANSACTION
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DROP DATABASE IF EXISTS `base`
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CREATE DATABASE IF NOT EXISTS `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,
`date` date NOT NULL,
`rang` smallint unsigned NOT NULL,
`prestataire` smallint unsigned NOT NULL,
`patient` smallint unsigned NOT NULL,
`code` smallint unsigned NOT NULL,
index `idx` (`date`,`rang`,`prestataire`,`patient`)
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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DROP TRIGGER IF EXISTS `rang`
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CREATE TRIGGER `rang`
BEFORE insert ON `test`
FOR EACH ROW
BEGIN
SET NEW.rang=ifnull((select max(rang)+1 from `test` where date=NEW.date),1);
END
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insert into `test` (`date`,`prestataire`,`patient`,`code`) values
('2018-12-29', 4, 12, 8),
('2018-12-30', 4, 12, 1),
('2018-12-30', 4, 12, 3),
('2018-12-30', 6, 10, 1),
('2018-12-30', 10, 123, 1),
('2018-12-31', 10, 123, 1),
('2018-12-31', 4, 12, 1),
('2018-12-31', 4, 76, 8),
('2018-12-31', 4, 76, 12)
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select * from `test`
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+----+------------+------+-------------+---------+------+
| id | date | rang | prestataire | patient | code |
+----+------------+------+-------------+---------+------+
| 1 | 2018-12-29 | 1 | 4 | 12 | 8 |
| 2 | 2018-12-30 | 1 | 4 | 12 | 1 |
| 3 | 2018-12-30 | 2 | 4 | 12 | 3 |
| 4 | 2018-12-30 | 3 | 6 | 10 | 1 |
| 5 | 2018-12-30 | 4 | 10 | 123 | 1 |
| 6 | 2018-12-31 | 1 | 10 | 123 | 1 |
| 7 | 2018-12-31 | 2 | 4 | 12 | 1 |
| 8 | 2018-12-31 | 3 | 4 | 76 | 8 |
| 9 | 2018-12-31 | 4 | 4 | 76 | 12 |
+----+------------+------+-------------+---------+------+
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select prestataire,
COUNT(distinct date) as Nbre
from `test`
where date between '2018-12-01' and '2018-12-31'
group by prestataire
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+-------------+------+
| prestataire | Nbre |
+-------------+------+
| 4 | 3 |
| 6 | 1 |
| 10 | 2 |
+-------------+------+
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COMMIT
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