CREATE USER 'xxx'@'%' IDENTIFIED BY 'yyy';
GRANT USAGE ON * . * TO 'xxx'@'%' IDENTIFIED BY 'yyy' WITH MAX_QUERIES_PER_HOUR 0 MAX_CONNECTIONS_PER_HOUR 0 MAX_UPDATES_PER_HOUR 0 MAX_USER_CONNECTIONS 0 ;
CREATE DATABASE IF NOT EXISTS `xxx` ;
GRANT ALL PRIVILEGES ON `xxx` . * TO 'xxx'@'%';