MySQLのCLI 「mysql」に関するtips
select の最後に \G を付ける事で一覧を縦表示にしてくれる
mysql> select schema_name, default_character_set_name, default_collation_name from information_schema.schemata;
+--------------------+----------------------------+------------------------+
| schema_name | default_character_set_name | default_collation_name |
+--------------------+----------------------------+------------------------+
| information_schema | utf8 | utf8_general_ci |
| mysql | latin1 | latin1_swedish_ci |
| performance_schema | utf8 | utf8_general_ci |
| soodb | utf8 | utf8_general_ci |
| sys | utf8 | utf8_general_ci |
+--------------------+----------------------------+------------------------+
5 rows in set (0.00 sec)
mysql> select schema_name, default_character_set_name, default_collation_name from information_schema.schemata \G
*************************** 1. row ***************************
schema_name: information_schema
default_character_set_name: utf8
default_collation_name: utf8_general_ci
*************************** 2. row ***************************
schema_name: mysql
default_character_set_name: latin1
default_collation_name: latin1_swedish_ci
*************************** 3. row ***************************
schema_name: performance_schema
default_character_set_name: utf8
default_collation_name: utf8_general_ci
*************************** 4. row ***************************
schema_name: soodb
default_character_set_name: utf8
default_collation_name: utf8_general_ci
*************************** 5. row ***************************
schema_name: sys
default_character_set_name: utf8
default_collation_name: utf8_general_ci
5 rows in set (0.00 sec)
mysql>ログイン
mysql -u root -p
[root@vm103 ~]# mysql -u root -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.7.39 MySQL Community Server (GPL)
Copyright (c) 2000, 2022, 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>
-- -pの後にそのままパスワード記載する事も可能（Warningでちゃうけど、、）
[root@vm103 ~]# mysql -u root -psoopass
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 8
Server version: 5.7.39 MySQL Community Server (GPL)
Copyright (c) 2000, 2022, 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> exit
Bye
-- 以下のように接続タイミングでデータベースを指定する事もできます
--
[root@vm103 ~]# mysql -u sooni -psoopass soodb
mysql: [Warning] Using a password on the command line interface can be insecure.
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A
ユーザ作成
create user 'sooni'@'%' identified by 'soopass';
ユーザへ権限付与
grant all privileges on *.* to 'sooni'@'%';
-- ユーザの作成
mysql> create user 'sooni'@'%' identified by 'soopass';
Query OK, 0 rows affected (0.00 sec)
-- 権限付与（*.*とはデータベース.テーブルを表しています）
-- ※ここでは検証用に付与していますが、通常は過剰な権限付与とならないように注意してください。
mysql> grant all privileges on *.* to 'sooni'@'%';
Query OK, 0 rows affected (0.00 sec)
mysql> select host,user from mysql.user order by user;
+-----------+---------------+
| host | user |
+-----------+---------------+
| localhost | mysql.session |
| localhost | mysql.sys |
| localhost | root |
| % | root |
| % | sooni |
+-----------+---------------+
5 rows in set (0.00 sec)
mysql>データベース作成
以下はキャラクターセット、照合順序(collate)を指定して作成しています。省略するとそれぞれ、latin1,latin1_swedish_ciとなり日本語の取り扱いが大変となるためです。何よりデフォルトで作成されているinformation_schemaやperformance_schem,sysなどもutf8/utf8_general_ciで作成されているので統一しておいたほうが良いと思います。(utf8を指定しておけば、照合順序はデフォルトでutf8_general_ciになります。参考までにですが、ciとは大文字小文字が区別されません。csにすると区別します）
create database soodb default character set utf8 collate utf8_general_ci;
データベース一覧
show databases;
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| soodb |
| sys |
+--------------------+
5 rows in set (0.00 sec)
mysql>select schema_name, default_character_set_name, default_collation_name from information_schema.schemata;
mysql> select schema_name, default_character_set_name, default_collation_name from information_schema.schemata;
+--------------------+----------------------------+------------------------+
| schema_name | default_character_set_name | default_collation_name |
+--------------------+----------------------------+------------------------+
| information_schema | utf8 | utf8_general_ci |
| mysql | latin1 | latin1_swedish_ci |
| performance_schema | utf8 | utf8_general_ci |
| soodb | utf8 | utf8_general_ci |
| sys | utf8 | utf8_general_ci |
+--------------------+----------------------------+------------------------+
5 rows in set (0.00 sec)
mysql>ログファイルの所在
ls -lt /var/log/mysqld.log
