000-MySQL初始化root用户密码

MySQL 5.7.5 及之前版本：

SET PASSWORD FOR 'root'@'localhost' = PASSWORD('MyNewPass');

MySQL 5.7.6 及之后版本：

ALTER USER 'root'@'localhost' IDENTIFIED BY 'MyNewPass';

或者：

UPDATE mysql.user
    SET authentication_string = PASSWORD('MyNewPass'), password_expired = 'N'
    WHERE User = 'root' AND Host = 'localhost';
FLUSH PRIVILEGES;