MySQL - user management

If we only use root user , There will be security risks .

1. user

1. User information

MySQL Users in , Are stored in the system database mysql Of user In the table .

• host： Indicates which host this user can log in from , If it is localhost, Indicates that you can only log in from this computer
• user： user name
• authentication_string： The user password passes password Function after encryption

2. Create user

create user ' user name '@' Landing host /ip' identified by ' password ';

 3. Delete user

drop user ' user name '@' Host name '

 4. Change user password

set password=password(' The new code ');                                     // Change your password

set password for ' user name '@' Host name '=password(' The new code ');  //root The user changes the password of the specified user

2. Database permissions

1. Authorize users

The newly created user does not have any permissions , The user needs to be authorized .

 grant Permission list on library . Object name to ' user name '@' Landing location ' [identified by ' password ']

• *.* : All objects representing all databases in the system （ surface , View , Stored procedure, etc ）
• library .* : Represents all data objects in a database ( surface , View , Stored procedure, etc )
• identified by Optional . If the user exists , Change the password while giving permission , If the user does not exist , It's about creating users

2. Recycling permissions

revoke Permission list on library . Object name from ' user name '@' Landing location ';