101 lines
1.9 KiB
Markdown
101 lines
1.9 KiB
Markdown
# MySQL users actions
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## Show users with hosts
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```SQL
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SELECT User, Host FROM mysql.user;
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```
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## Check user privileges
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```SQL
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SHOW GRANTS FOR 'someuser'@'somehost.somedomain';
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```
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## Create user
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```SQL
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CREATE USER 'some_user'@'somehost.somedomain' IDENTIFIED BY 'some_password';
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FLUSH PRIVILEGES;
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```
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## Delete user
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```SQL
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DROP USER 'some_user'@'somehost.somedomain';
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FLUSH PRIVILEGES;
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```
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## Granting privileges
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### Grant all privileges
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```SQL
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GRANT ALL PRIVILEGES ON *.* TO 'some_user'@'somehost.somedomain' WITH GRANT OPTION;
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FLUSH PRIVILEGES;
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```
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### Grant privilege on database 'some_db'
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```SQL
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GRANT SELECT ON `some_db`.* TO 'some_user'@'somehost.somedomain';
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FLUSH PRIVILEGES;
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```
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### Grant privilege on table 'some_db'.'some_table'
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```SQL
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GRANT SELECT ON `some_db`.'some_table' TO 'some_user'@'somehost.somedomain';
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FLUSH PRIVILEGES;
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```
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### Grant privilege to select and update some columns on table 'some_db'.'some_table'
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```SQL
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GRANT SELECT (id, some_column), UPDATE (some_column) ON `some_db`.`some_table` TO 'some_user'@'somehost.somedomain';
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```
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### Grant with inheritance
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```SQL
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GRANT SELECT, INSERT, UPDATE, DELETE ON `some_db`.* TO 'some_user'@'somehost' WITH GRANT OPTION;
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FLUSH PRIVILEGES;
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```
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**'WITH GRANT OPTION'** makes it possible to convey to others what is permitted to oneself.
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## Revoking privileges
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### Revoke privilege to select from database 'somedb'
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```SQL
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REVOKE SELECT ON `somedb`.* FROM 'someuser'@'somehost';
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FLUSH PRIVILEGES;
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```
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### Revoke all privileges from user
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```SQL
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ALL PRIVILEGES ON *.* FROM 'someuser'@'somehost';
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FLUSH PRIVILEGES;
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```
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### Revoke all privileges to database 'somedb' from user
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```SQL
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ALL PRIVILEGES ON `somedb`.* FROM 'someuser'@'somehost';
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FLUSH PRIVILEGES;
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```
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### Revoke all privileges from user
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```SQL
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REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'someuser'@'somehost';
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FLUSH PRIVILEGES;
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```
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## Change password
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```SQL
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ALTER USER 'test_user'@'localhost' IDENTIFIED BY 'new_password';
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``` |