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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 NOT NULL AUTO_INCREMENT primary key,
`name` varchar(255) NOT NULL
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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insert into `test` (`name`) values
('évolution'),
('régression'),
('stable'),
('évolution'),
('évolution'),
('régression'),
('stable'),
('évolution'),
('évolution'),
('évolution')
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select * from test
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+----+------------+
| id | name |
+----+------------+
| 1 | évolution |
| 2 | régression |
| 3 | stable |
| 4 | évolution |
| 5 | évolution |
| 6 | régression |
| 7 | stable |
| 8 | évolution |
| 9 | évolution |
| 10 | évolution |
+----+------------+
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select name, cast(100 * (count(name) / (select count(*) from test)) as decimal(5,2)) as Moyenne from test group by name
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+------------+---------+
| name | Moyenne |
+------------+---------+
| évolution | 60.00 |
| régression | 20.00 |
| stable | 20.00 |
+------------+---------+
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COMMIT
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SET AUTOCOMMIT = 1
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