how to grant user all privileges in mysql using cmd code example

Example 1: mysql grant all privileges to a user

GRANT ALL PRIVILEGES ON database_name.* TO 'username'@'localhost';

Example 2: grant revoke privileges to mysql username

#in SQL execute
#GRANT type_of_permission ON database_name.table_name TO 'username'@'localhost';
GRANT ALL PRIVILEGES ON * . * TO 'username'@'localhost';
#reload all the privileges
FLUSH PRIVILEGES;

#Show Privileges
SHOW GRANTS FOR 'username'@'localhost';

#Revoke Privileges
REVOKE type_of_permission ON database_name.table_name FROM 'username'@'localhost';