create user
CREATE USER username IDENTIFIED BY password
Example:
CREATE USER kaigexuetang IDENTIFIED BY ‘kaige123.com’;
delete users
Note that deleting a user requires revoking permissions
DROP USER []
Example:
DROP USER kaigexuetang;
give user permissions
GRANT [function] ON library. table TO user
Example:
GRANT SELECT ON kaige.user TO kaigexuetang;
Take back permissions
REVOKE [Function] ON LIBRARY. TABLE FROM USER
Example:
REVOKE SELECT ON kaige.user FROM kaigexuetang;
Modify user password
SET PASSWORD FOR kaigexuetang=PASSWORD('kaige123.com');
show all permissions
SHOW GRANTS FOR kaigexuetang;