how to check privileges of user in mysql code example

Example 1: mysql check user privileges

SHOW GRANTS FOR 'root'@'localhost';

Example 2: mysql users and privileges list

SELECT * FROM information_schema.user_privileges;
SELECT CONCAT('SHOW GRANTS FOR ''',user,'''@''',host,''';') FROM mysql.user;
SHOW GRANTS FOR 'my_user'@'localhost';