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SET AUTOCOMMIT = 0
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--------------
START TRANSACTION
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SET session 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 `test1`
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CREATE TABLE `test1`
( `id` integer unsigned auto_increment NOT NULL primary key,
`col1` varchar(255) NOT NULL
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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INSERT INTO `test1` (`col1`) VALUES
('Dupond'),('Durand'),('Grandjean')
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select * from test1
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+----+-----------+
| id | col1 |
+----+-----------+
| 1 | Dupond |
| 2 | Durand |
| 3 | Grandjean |
+----+-----------+
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DROP TABLE IF EXISTS `test2`
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CREATE TABLE `test2`
( `id` integer unsigned auto_increment NOT NULL primary key,
`col2` varchar(255) NOT NULL
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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INSERT INTO `test2` (`col2`) VALUES
('Patrick'),('Marcel'),('Léon')
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select * from test2
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+----+---------+
| id | col2 |
+----+---------+
| 1 | Patrick |
| 2 | Marcel |
| 3 | Léon |
+----+---------+
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DROP TABLE IF EXISTS `test3`
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CREATE TABLE `test3`
( `id` integer unsigned auto_increment NOT NULL primary key,
`col3` varchar(255) NOT NULL,
`id_fk1` integer unsigned NOT NULL,
`id_fk2` integer unsigned NOT NULL,
CONSTRAINT `FK_01` FOREIGN KEY (`id_fk1`) REFERENCES `test1` (`id`) ON DELETE RESTRICT ON UPDATE CASCADE,
CONSTRAINT `FK_02` FOREIGN KEY (`id_fk2`) REFERENCES `test2` (`id`) ON DELETE RESTRICT ON UPDATE CASCADE
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
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INSERT INTO `test3` (`col3`,`id_fk1`,`id_fk2`) VALUES
('Paris', 1, 1),('Lyon', 2, 3),('Marseile', 3, 2)
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select * from test3
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+----+----------+--------+--------+
| id | col3 | id_fk1 | id_fk2 |
+----+----------+--------+--------+
| 1 | Paris | 1 | 1 |
| 2 | Lyon | 2 | 3 |
| 3 | Marseile | 3 | 2 |
+----+----------+--------+--------+
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select tb1.col1, tb2.col2, tb3.col3
from test3 as tb3
inner join test2 as tb2
on tb2.id = tb3.id_fk2
inner join test1 as tb1
on tb1.id = tb3.id_fk1
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+-----------+---------+----------+
| col1 | col2 | col3 |
+-----------+---------+----------+
| Dupond | Patrick | Paris |
| Durand | Léon | Lyon |
| Grandjean | Marcel | Marseile |
+-----------+---------+----------+
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COMMIT
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SET AUTOCOMMIT = 1
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