CREATE DATABASE IF NOT EXISTS `db_name`;
CREATE USER IF NOT EXISTS 'root'@'%' IDENTIFIED BY '123456';
GRANT ALL PRIVILEGES ON `db_name`.* TO 'root'@'%';
FLUSH PRIVILEGES;
CREATE DATABASE IF NOT EXISTS `db_name`;
CREATE USER IF NOT EXISTS 'root'@'%' IDENTIFIED BY '123456';
GRANT ALL PRIVILEGES ON `db_name`.* TO 'root'@'%';
FLUSH PRIVILEGES;