# user 생성
DROP USER user_id;
CREATE USER user_id@`%` IDENTIFIED BY 'user_pw';
GRANT ALL PRIVILEGES ON *.* TO user_id@`%`;
# 확인
SELECT *
FROM mysql.user
WHERE `User` = 'user_id';
# 유저 생성과 동시에 권한 부여
GRANT ALL PRIVILEGES ON *.* TO user_id@`%` IDENTIFIED BY 'user_pw';