Pooja-Lohar25 / mysqlUserBasics

Mysql User Management Basics

Working with Mysql shell

\sql // to activate sql 

\connect root@localhost // to connect to the server with user root and host as localhost

User Management

View existing Users with host

syntax :

select user, host from mysql.user; 

Create New User

syntax:

create user 'username'@'host' identified by 'password';

View grants / privileges

syntax:

show grants for username@host ;

Grant Privileges

syntax :

grant privilege_name on dbname.tablename to username@host;

examples :

• Grant select privilege :

 grant select on *.* to user@host; // all databases and all tables

grant select on db.tb to user2host; // database db having table tb

• Grant update on single column :

grant update (col) on db.tb to user@host;

Revoke Privileges

syntax :

revoke privilege_name on dbname.tablename from user@host; <br>

privilege must be first granted only then it could be revoked
Only those granted privileges can be revoked.

view currently running users
select id, users from information_schema.processlist;

to disconnect a existing user connection from root account

kill \<id\>; //id given in the previos table i.e processlist 

Different types of users

'username'@'localhost'
'pooja'@'localhost' // pooja can only access it through localhost

'username'@'192.25.1.2'
'pooja'@'192.25.1.2' // pooja can only access through server 192.25.1.2

'username'
'pooja' // username without specifying host will enable it to access from anywhere