1.在root用户下操作
删库语句：DROP DATABASE IF EXISTS dev_teller9;
删除用户：DROP USER dev_teller9;
建库语句: CREATE DATABASE dev_teller9 DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci; 建立用户：create user 'dev_teller9'@'%' IDENTIFIED by 'dev_teller9'; 为用户授权GRANT ALL PRIVILEGES on `dev_teller9`.* to 'dev_teller9'@'%'; FLUSH PRIVILEGES; COMMIT ;
