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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,
`domaine` varchar(255) not null,
`telephone` char(12) null default null
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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insert into `test` (`domaine`,`telephone`) values
('ABC', '0023125489'),
('DEF', '00215487232'),
('GHI', '01235478996'),
('ABC', NULL),
('MNO', '12412365487'),
('PQR', NULL),
('ABC', NULL),
('VWU', '21548796251'),
('GHI', NULL)
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select * from `test`
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+----+---------+-------------+
| id | domaine | telephone |
+----+---------+-------------+
| 1 | ABC | 0023125489 |
| 2 | DEF | 00215487232 |
| 3 | GHI | 01235478996 |
| 4 | ABC | NULL |
| 5 | MNO | 12412365487 |
| 6 | PQR | NULL |
| 7 | ABC | NULL |
| 8 | VWU | 21548796251 |
| 9 | GHI | NULL |
+----+---------+-------------+
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commit
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update `test` as t1
join ( select domaine, any_value(telephone) as telephone
from `test`
where telephone is not null
group by domaine
) as t2
on t2.domaine = t1.domaine
set t1.telephone = t2.telephone
where t2.telephone is not null
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select * from `test`
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+----+---------+-------------+
| id | domaine | telephone |
+----+---------+-------------+
| 1 | ABC | 0023125489 |
| 2 | DEF | 00215487232 |
| 3 | GHI | 01235478996 |
| 4 | ABC | 0023125489 |
| 5 | MNO | 12412365487 |
| 6 | PQR | NULL |
| 7 | ABC | 0023125489 |
| 8 | VWU | 21548796251 |
| 9 | GHI | 01235478996 |
+----+---------+-------------+
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COMMIT
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