MariaDB を削除して、Mysql をインストール

Ubuntu 22.04 で確認した方法です。
MariaDB の代わりに、MySQL を使う方法です。

MariaDB の状態

バージョン

MariaDB [city]> select version();
+----------------------------------+
| version()                        |
+----------------------------------+
| 10.6.12-MariaDB-0ubuntu0.22.04.1 |
+----------------------------------+
1 row in set (0.000 sec)

sql モード

MariaDB [city]> select @@sql_mode;
+-------------------------------------------------------------------------------------------+
| @@sql_mode                                                                                |
+-------------------------------------------------------------------------------------------+
| STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
+-------------------------------------------------------------------------------------------+
1 row in set (0.000 sec)

MariaDB の停止

sudo systemctl stop mariadb

MariaDB の削除

sudo apt purge mariadb-server
sudo apt purge mariadb-client
sudo apt purge mariadb-common

sudo rm -rf /var/lib/mysql
sudo rm -rf /etc/mysql

Mysql のインストール

sudo apt install mysql-server mysql-client mysql-common

Mysql の起動

sudo systemctl start mysql

Mysql が動いていることを確認

sudo systemctl status mysql

Mysql にアクセス

$ sudo mysql -uroot
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 70
Server version: 8.0.34 MySQL Community Server - GPL

Copyright (c) 2000, 2023, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> select version();
+-----------+
| version() |
+-----------+
| 8.0.34    |
+-----------+
1 row in set (0.01 sec)

mysql>

sql_mode の確認

mysql> select @@sql_mode;
+-----------------------------------------------------------------------------------------------------------------------+
| @@sql_mode                                                                                                            |
+-----------------------------------------------------------------------------------------------------------------------+
| ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION |
+-----------------------------------------------------------------------------------------------------------------------+
1 row in set (0.00 sec)

mysql>