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| --------------
SET AUTOCOMMIT = 0
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START TRANSACTION
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SET collation_connection = latin1_general_ci
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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 `indiv`
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CREATE TABLE `indiv`
( `id` integer unsigned not null auto_increment primary key,
`matricule` char(05) not null,
`code_client` char(07) not null,
index `IDX_1` (`matricule`,`code_client`)
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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insert into `indiv` (`matricule`,`code_client`) values
('12345','zulu'),('23456','tango'),('34567','charlie'),('45678','bravo'),('56789','golf'),('67890','sierra')
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select * from indiv
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+----+-----------+-------------+
| id | matricule | code_client |
+----+-----------+-------------+
| 1 | 12345 | zulu |
| 2 | 23456 | tango |
| 3 | 34567 | charlie |
| 4 | 45678 | bravo |
| 5 | 56789 | golf |
| 6 | 67890 | sierra |
+----+-----------+-------------+
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DROP TABLE IF EXISTS `pap`
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CREATE TABLE `pap`
( `id` integer unsigned not null auto_increment primary key,
`num_matricule` char(05) not null,
`code_client` char(07) not null,
`code_document` char(07) not null,
`nom_salarie` varchar(255) not null,
index `IDX_2` (`num_matricule`,`code_client`),
index `IDX_3` (`code_document`)
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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insert into `pap` (`num_matricule`,`code_client`,`nom_salarie`,`code_document`) values
('12345', 'zulu', 'alphonse daudet', 'G270033'),
('23456', 'tango', 'marcel amont', 'G270033'),
('34567', 'charlie', 'gaston leroux', 'G350010'),
('45678', 'bravo', 'Maurice Leblanc', 'G350010'),
('56789', 'golf', ' Pierre Ponson du Terrail', 'G450077'),
('67890', 'sierra', 'jules verne', 'G450077')
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select * from pap
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+----+---------------+-------------+---------------+---------------------------+
| id | num_matricule | code_client | code_document | nom_salarie |
+----+---------------+-------------+---------------+---------------------------+
| 1 | 12345 | zulu | G270033 | alphonse daudet |
| 2 | 23456 | tango | G270033 | marcel amont |
| 3 | 34567 | charlie | G350010 | gaston leroux |
| 4 | 45678 | bravo | G350010 | Maurice Leblanc |
| 5 | 56789 | golf | G450077 | Pierre Ponson du Terrail |
| 6 | 67890 | sierra | G450077 | jules verne |
+----+---------------+-------------+---------------+---------------------------+
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SELECT DISTINCT *
FROM pap
LEFT outer JOIN indiv
ON indiv.MATRICULE = pap.NUM_MATRICULE
AND indiv.CODE_CLIENT = pap.CODE_CLIENT
WHERE pap.CODE_DOCUMENT = 'G350010'
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+----+---------------+-------------+---------------+-----------------+------+-----------+-------------+
| id | num_matricule | code_client | code_document | nom_salarie | id | matricule | code_client |
+----+---------------+-------------+---------------+-----------------+------+-----------+-------------+
| 3 | 34567 | charlie | G350010 | gaston leroux | 3 | 34567 | charlie |
| 4 | 45678 | bravo | G350010 | Maurice Leblanc | 4 | 45678 | bravo |
+----+---------------+-------------+---------------+-----------------+------+-----------+-------------+
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explain
SELECT DISTINCT *
FROM pap
LEFT outer JOIN indiv
ON indiv.MATRICULE = pap.NUM_MATRICULE
AND indiv.CODE_CLIENT = pap.CODE_CLIENT
WHERE pap.CODE_DOCUMENT = 'G350010'
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+----+-------------+-------+------------+------+---------------+-------+---------+---------------------------------------------+------+----------+-----------------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+-------+------------+------+---------------+-------+---------+---------------------------------------------+------+----------+-----------------+
| 1 | SIMPLE | pap | NULL | ref | IDX_3 | IDX_3 | 7 | const | 2 | 100.00 | Using temporary |
| 1 | SIMPLE | indiv | NULL | ref | IDX_1 | IDX_1 | 12 | base.pap.num_matricule,base.pap.code_client | 1 | 100.00 | Using index |
+----+-------------+-------+------------+------+---------------+-------+---------+---------------------------------------------+------+----------+-----------------+
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COMMIT
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SET AUTOCOMMIT = 1
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