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| --------------
SET AUTOCOMMIT = 0
--------------
--------------
START TRANSACTION
--------------
--------------
DROP DATABASE IF EXISTS `base`
--------------
--------------
CREATE DATABASE `base`
DEFAULT CHARACTER SET `latin1`
DEFAULT COLLATE `latin1_general_ci`
--------------
--------------
DROP TABLE IF EXISTS `trav`
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--------------
CREATE TABLE `trav`
( `id` integer unsigned NOT NULL auto_increment primary key,
`computername` varchar(255) NOT NULL,
`username` varchar(255) NOT NULL,
`targeturl` varchar(255) NOT NULL
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
--------------
--------------
INSERT INTO `trav` (`computername`,`username`,`targeturl`) VALUES
('ordi 1', 'user 1', 'cible a'),
('ordi 1', 'user 2', 'cible b'),
('ordi 1', 'user 3', 'cible c'),
('ordi 2', 'user 1', 'cible d'),
('ordi 2', 'user 4', 'cible e'),
('ordi 2', 'user 5', 'cible f'),
('ordi 3', 'user 2', 'cible g'),
('ordi 3', 'user 5', 'cible h'),
('ordi 4', 'user 2', 'cible i'),
('ordi 4', 'user 3', 'cible j')
--------------
--------------
select * from `trav`
--------------
+----+--------------+----------+-----------+
| id | computername | username | targeturl |
+----+--------------+----------+-----------+
| 1 | ordi 1 | user 1 | cible a |
| 2 | ordi 1 | user 2 | cible b |
| 3 | ordi 1 | user 3 | cible c |
| 4 | ordi 2 | user 1 | cible d |
| 5 | ordi 2 | user 4 | cible e |
| 6 | ordi 2 | user 5 | cible f |
| 7 | ordi 3 | user 2 | cible g |
| 8 | ordi 3 | user 5 | cible h |
| 9 | ordi 4 | user 2 | cible i |
| 10 | ordi 4 | user 3 | cible j |
+----+--------------+----------+-----------+
--------------
DROP TABLE IF EXISTS `computer`
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--------------
CREATE TABLE `computer`
( `id` integer unsigned NOT NULL auto_increment primary key,
`computer_name` varchar(255) NOT NULL,
index `IDX_COMPUTERNAME` (`computer_name`)
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
--------------
--------------
DROP TABLE IF EXISTS `user`
--------------
--------------
CREATE TABLE `user`
( `id` integer unsigned NOT NULL auto_increment primary key,
`user_name` varchar(255) NOT NULL,
index `IDX_USERNAME` (`user_name`)
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
--------------
--------------
DROP TABLE IF EXISTS `evolution`
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--------------
CREATE TABLE `evolution`
( `id` integer unsigned NOT NULL auto_increment primary key,
`target_url` varchar(255) NOT NULL,
`computer_clef` integer unsigned NOT NULL,
`user_clef` integer unsigned NOT NULL,
CONSTRAINT `FK_COMPUTER` FOREIGN KEY (`computer_clef`) REFERENCES `computer` (`id`) ON DELETE CASCADE ON UPDATE CASCADE,
CONSTRAINT `FK_USER` FOREIGN KEY (`user_clef`) REFERENCES `user` (`id`) ON DELETE CASCADE ON UPDATE CASCADE
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
--------------
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insert into `computer` (`computer_name`)
select distinct computername as computer_name
from `trav`
--------------
--------------
select * from `computer`
--------------
+----+---------------+
| id | computer_name |
+----+---------------+
| 1 | ordi 1 |
| 2 | ordi 2 |
| 3 | ordi 3 |
| 4 | ordi 4 |
+----+---------------+
--------------
insert into `user` (`user_name`)
select distinct username as user_name
from `trav`
--------------
--------------
select * from `user`
--------------
+----+-----------+
| id | user_name |
+----+-----------+
| 1 | user 1 |
| 2 | user 2 |
| 3 | user 3 |
| 4 | user 4 |
| 5 | user 5 |
+----+-----------+
--------------
explain
insert into `evolution` (`target_url`,`computer_clef`,`user_clef`)
select t1.targeturl as target_url,
t2.id as computer_clef,
t3.id as user_clef
from `trav` as t1
inner join `computer` as t2
on t2.computer_name = t1.computername
inner join `user` as t3
on t3.user_name = t1.username
--------------
+----+-------------+-----------+------------+-------+------------------+------------------+---------+------------------+------+----------+----------------------------------------------------+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
+----+-------------+-----------+------------+-------+------------------+------------------+---------+------------------+------+----------+----------------------------------------------------+
| 1 | INSERT | evolution | NULL | ALL | NULL | NULL | NULL | NULL | NULL | NULL | NULL |
| 1 | SIMPLE | t2 | NULL | index | IDX_COMPUTERNAME | IDX_COMPUTERNAME | 257 | NULL | 4 | 100.00 | Using index |
| 1 | SIMPLE | t1 | NULL | ALL | NULL | NULL | NULL | NULL | 10 | 10.00 | Using where; Using join buffer (Block Nested Loop) |
| 1 | SIMPLE | t3 | NULL | ref | IDX_USERNAME | IDX_USERNAME | 257 | base.t1.username | 1 | 100.00 | Using index |
+----+-------------+-----------+------------+-------+------------------+------------------+---------+------------------+------+----------+----------------------------------------------------+
--------------
select * from `evolution`
--------------
--------------
insert into `evolution` (`target_url`,`computer_clef`,`user_clef`)
select t1.targeturl as target_url,
t2.id as computer_clef,
t3.id as user_clef
from `trav` as t1
inner join `computer` as t2
on t2.computer_name = t1.computername
inner join `user` as t3
on t3.user_name = t1.username
--------------
--------------
select * from `evolution`
--------------
+----+------------+---------------+-----------+
| id | target_url | computer_clef | user_clef |
+----+------------+---------------+-----------+
| 1 | cible a | 1 | 1 |
| 2 | cible b | 1 | 2 |
| 3 | cible c | 1 | 3 |
| 4 | cible d | 2 | 1 |
| 5 | cible e | 2 | 4 |
| 6 | cible f | 2 | 5 |
| 7 | cible g | 3 | 2 |
| 8 | cible h | 3 | 5 |
| 9 | cible i | 4 | 2 |
| 10 | cible j | 4 | 3 |
+----+------------+---------------+-----------+
--------------
select t2.computer_name,
t3.user_name,
t1.target_url
from `evolution` as t1
inner join `computer` as t2
on t2.id = t1.computer_clef
inner join `user` as t3
on t3.id = t1.user_clef
--------------
+---------------+-----------+------------+
| computer_name | user_name | target_url |
+---------------+-----------+------------+
| ordi 1 | user 1 | cible a |
| ordi 1 | user 2 | cible b |
| ordi 1 | user 3 | cible c |
| ordi 2 | user 1 | cible d |
| ordi 2 | user 4 | cible e |
| ordi 2 | user 5 | cible f |
| ordi 3 | user 2 | cible g |
| ordi 3 | user 5 | cible h |
| ordi 4 | user 2 | cible i |
| ordi 4 | user 3 | cible j |
+---------------+-----------+------------+
--------------
drop table `trav`
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COMMIT
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SET AUTOCOMMIT = 1
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