mysql 数据库建立、添加用户、设置外网访问权限

出现此错误时：ERROR 1819 (HY000): Your password does not satisfy the current policy requirements，出现这个问题怎么办？

修改validate_password_policy参数的值。set global validate_password_policy=0;

一、修改用户密码。ALTER USER USER() IDENTIFIED BY '12345678';

二、建立用户。CREATE USER 'db_user'@'%' IDENTIFIED BY '12345678';

三、受权。GRANT ALL PRIVILEGES ON *.* TO 'db_user'@'%' IDENTIFIED BY '12345678' WITH GRANT OPTION;

四、刷新。FLUSH PRIVILEGES;