mysql add users and add new databases and authorizations

Add users, create new databases, and authorize users in MySQL

1. Create a new user

• Login to MYSQL:

　　@>mysql -u root -p

　　@> password

• Create user:

　　mysql>  insert into mysql.user(Host,User,Password) values("localhost","healthyuser",password("admin"));

　　This creates a user named: healthyuser with   password: admin .

Note : "localhost" here means that the user can only log in locally and cannot log in remotely on another machine. If you want to log in remotely, change "localhost" to "%", which means you can log in from any computer. You can also specify a machine that can log in remotely.

• Then log in:

　　mysql>exit;

　　@>mysql -u test -p

　　@> enter password

　　mysql> login successful

2. Authorize the user

　　Authorization format: grant permission on database.* to username@login host identified by "password";　

• Log in to MYSQL (with ROOT privileges), here log in as ROOT:

　　@>mysql -u root -p

　　@> password

• First create a database for the user ( healthy ):

　　mysql>create database healthy;

• Authorize the healthyuser user to have all permissions on the healthy database (all permissions on a database):

　　 mysql>grant all privileges on healthy.* to healthyuser@localhost identified by 'admin';

 　　mysql>flush privileges;//Refresh the system privilege table

　　Format: grant permission on database.* to username@login host identified by "password";　

• If you want to assign partial permissions to a user, you can write:

　　mysql>grant select,update on healthy.* to healthyuser@localhost identified by 'admin';

　　mysql>flush privileges; //Refresh the system privilege table

• Authorize the healthyuser user to have certain permissions on all databases :

　　mysql>grant select,delete,update,create,drop on *.* to healthyuser@"%" identified by "admin";