159 lines
4.1 KiB
Markdown
159 lines
4.1 KiB
Markdown
# Bases
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### Voir toutes les bases:
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`mysql> SHOW DATABASES;`
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```mysql
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MariaDB [(none)]> SHOW DATABASES;
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+--------------------+
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| Database |
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+--------------------+
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| information_schema |
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| mysql |
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| performance_schema |
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| sys |
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| wordpress |
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+--------------------+
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```
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### Utiliser une base existante:
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`mysql> USE database;`
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```mysql
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MariaDB [(none)]> USE wordpress;
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Reading table information for completion of table and column names
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You can turn off this feature to get a quicker startup with -A
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Database changed
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MariaDB [wordpress]>
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```
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### Créer une base de donnée:
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`mysql> CREATE DATABASE database;`
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```mysql
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MariaDB [(none)]> CREATE DATABASE bdd;
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Query OK, 1 row affected (0.001 sec)
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```
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et donner les privilèges à un utilisateur (existant) sur cette base:
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```mysql
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MariaDB [(none)]> GRANT ALL ON bdd.* TO 'theuser'@'localhost';
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Query OK, 0 rows affected (0.021 sec)
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MariaDB [(none)]> FLUSH PRIVILEGES
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```
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ou à un utilisateur qui n'existe pas encore:
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```mysql
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MariaDB [(none)]> GRANT ALL ON bdd.* TO 'matrix'@'localhost' IDENTIFIED BY 'password';
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Query OK, 0 rows affected (0.030 sec)
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MariaDB [(none)]> FLUSH PRIVILEGES
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```
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L'utilisateur 'matrix' sera crée.
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`mysql> CREATE DATABASE IF NOT EXISTS database;`
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Avec `IF NOT EXISTS`, la base est créée uniquement si il n'y a pas de conflit de nom. Sans, MySQL envoie une erreur.
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```mysql
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MariaDB [(none)]> CREATE DATABASE IF NOT EXISTS bdd;
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Query OK, 1 row affected (0.003 sec)
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```
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`CHARACTER SET` `COLLATE`
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```mariadb
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MariaDB [(none)]> CREATE DATABASE mydatabase CHARACTER SET utf8 COLLATE utf8_general_ci;
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Query OK, 1 row affected (0.005 sec)
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```
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### Supprimer une base:
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`mysql> DROP DATABASE database;`
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```mysql
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MariaDB [(none)]> DROP DATABASE bdd;
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Query OK, 0 rows affected (0.074 sec)
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```
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Ajouter `IF EXISTS` évite le message d'erreur si la base n'existe pas:
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```mariadb
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MariaDB [(none)]> DROP DATABASE IF EXISTS zenphoto;
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Query OK, 0 rows affected, 1 warning (0.000 sec)
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```
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```mariadb
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MariaDB [(none)]> DROP DATABASE zenphoto;
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ERROR 1008 (HY000): Can't drop database 'zenphoto'; database doesn't exist
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```
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#### Bases dans macOS:
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Les bases se trouvent dans: `$(brew --prefix)/var/mysql`
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**mac intel:**
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```bash
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bruno@SilverBook: /usr/local/var/mysql $ l
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total 245920
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-rw-rw---- 1 bruno admin 6519 15 oct 17:48 SilverBook.local.err
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-rw-rw---- 1 bruno admin 5 15 oct 17:48 SilverBook.local.pid
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-rw-rw---- 1 bruno admin 24576 15 oct 17:46 aria_log.00000001
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-rw-rw---- 1 bruno admin 52 15 oct 17:46 aria_log_control
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-rw-r----- 1 bruno admin 976 15 oct 17:46 ib_buffer_pool
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-rw-rw---- 1 bruno admin 50331648 15 oct 17:48 ib_logfile0
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-rw-rw---- 1 bruno admin 50331648 6 aoû 20:18 ib_logfile1
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-rw-rw---- 1 bruno admin 12582912 15 oct 17:46 ibdata1
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-rw-rw---- 1 bruno admin 12582912 15 oct 17:48 ibtmp1
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-rw-rw---- 1 bruno admin 0 6 aoû 20:18 multi-master.info
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drwx------ 90 bruno admin 2880 6 aoû 20:18 mysql
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drwx------ 3 bruno admin 96 6 aoû 20:18 performance_schema
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-rw-rw---- 1 bruno admin 3047 11 aoû 22:49 silverbook-1.home.err
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-rw-rw---- 1 bruno admin 30926 15 oct 17:46 silverbook.home.err
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```
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**mac M1:**
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```bash
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❯ cd /opt/homebrew/var/mysql
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total 123324
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-rw-rw---- 1 bruno admin 7308 sep 2 16:19 AirBook.err
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-rw-rw---- 1 bruno admin 5 aoû 11 23:09 airbook.pid
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-rw-rw---- 1 bruno admin 417792 sep 3 18:18 aria_log.00000001
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-rw-rw---- 1 bruno admin 52 aoû 11 22:49 aria_log_control
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-rw-rw---- 1 bruno admin 16384 sep 3 18:18 ddl_recovery.log
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-rw-r----- 1 bruno admin 946 aoû 11 22:49 ib_buffer_pool
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-rw-rw---- 1 bruno admin 100663296 sep 3 18:18 ib_logfile0
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-rw-rw---- 1 bruno admin 12582912 aoû 11 22:49 ibdata1
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-rw-rw---- 1 bruno admin 12582912 aoû 11 23:09 ibtmp1
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-rw-rw---- 1 bruno admin 0 jul 29 09:44 multi-master.info
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drwx------ 90 bruno admin 2880 sep 3 18:18 mysql
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drwx------ 3 bruno admin 96 jul 29 09:43 performance_schema
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drwx------ 109 bruno admin 3488 sep 3 18:18 sys
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drwx------ 27 bruno admin 864 sep 3 18:18 wordpress
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```
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