What does user mean in mysql?

User in MySQL is a database object, which represents an entity that can interact with the database, including user name, password, permissions and host information. Use CREATE USER to create a user, GRANT to grant permissions, and REVOKE to revoke permissions. Managing Users is critical to database security as it controls access permissions and operations.

User in MySQL

What is User?

User in MySQL is a database object that represents an entity that can interact with the database. It defines the user's access rights to the database and its objects.

User composition:

A User usually contains the following information:

• User name (user_name): User identifier, unique in the database.
• Password (password): An encrypted string used to authenticate the user.
• Permissions (privileges): Grant users permission to access and operate specific objects of the database (such as tables, views, procedures).
• Host: The host or IP address from which users are allowed to connect to the database.

Create User:

You can use the CREATE USER statement to create a new User:

<code class="sql">CREATE USER 'username' IDENTIFIED BY 'password';</code>

Grant permissions:

You can use the GRANT statement to grant user permissions:

<code class="sql">GRANT SELECT ON database.table TO 'username';</code>

Revoke permissions:

You can use REVOKE Statement to revoke user permissions:

<code class="sql">REVOKE SELECT ON database.table FROM 'username';</code>

Manage User:

The following are some useful commands for managing User:

• SHOW GRANTS FOR 'username';: Show the user's permissions.
• ALTER USER 'username' IDENTIFIED BY 'new_password';: Change the user's password.
• DROP USER 'username';: Delete the user.

Importance of User:

Managing User is very important because it enables administrators to control who can access the database and what operations they can perform. This helps protect the security of database data from unauthorized access and modification.

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