ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this st

安装mysql8后，本地登录成功，选择数据库报错

ERROR 1820 (HY000): You must reset your password using ALTER USER statement before executing this statement.

解决办法： 

执行语句修改密码：set password='新密码';

如果密码符合Mysql要求，会修改成功。如果出现以下错误信息：
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements
执行如下两条语句：
set global validate_password.policy=0;
set global validate_password.length=1;
然后再次执行 set password='新密码'; 即可。