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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,
`variable` char(06) not null,
`valeur` varchar(255) not null,
primary key (`id`,`variable`)
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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insert into `test` (`id`,`variable`,`valeur`) values
(1, 'NOM', 'DURAND'),
(1, 'PRENOM', 'PIERRE'),
(1, 'DOB', '21/11/1990'),
(2, 'NOM', 'DUPONT'),
(2, 'PRENOM', 'JACQUES'),
(2, 'DOB', '17/08/2000')
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select * from `test`
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+----+----------+------------+
| id | variable | valeur |
+----+----------+------------+
| 1 | DOB | 21/11/1990 |
| 1 | NOM | DURAND |
| 1 | PRENOM | PIERRE |
| 2 | DOB | 17/08/2000 |
| 2 | NOM | DUPONT |
| 2 | PRENOM | JACQUES |
+----+----------+------------+
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select id,
max(nom) as nom,
max(prenom) as prenom,
max(dob) as dob
from ( select id,
case variable when 'NOM' then valeur else '' end as nom,
case variable when 'PRENOM' then valeur else '' end as prenom,
case variable when 'DOB' then cast(str_to_date(valeur, '%d/%m/%Y') as date) else '' end as dob
from test
) as x
group by id
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+----+--------+---------+------------+
| id | nom | prenom | dob |
+----+--------+---------+------------+
| 1 | DURAND | PIERRE | 1990-11-21 |
| 2 | DUPONT | JACQUES | 2000-08-17 |
+----+--------+---------+------------+
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COMMIT
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SET AUTOCOMMIT = 1
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