Navicat连接mysql8.0.1版本出现1251--Client does not support authentication protocol requested by server的解决
好不容易安装好mysql，但又出现了mysql客户端版本太低的问题。根据参考的这篇教程，完美的解决了该问题。
1、通过命令行进入解压的mysql根目录下。
2、登陆数据库
mysql -uroot -p3、再输入root的密码：
Enter password: ******
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 18
Server version: 8.0.11 MySQL Community Server - GPL
Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type ‘help;‘ or ‘\h‘ for help. Type ‘\c‘ to clear the current input statement.
mysql>
4、更改加密方式：
mysql> ALTER USER ‘root‘@‘localhost‘ IDENTIFIED BY ‘password‘ PASSWORD EXPIRE NEVER;5、更改密码：该例子中 123为新密码
mysql> ALTER USER ‘root‘@‘localhost‘ IDENTIFIED WITH mysql_native_password BY ‘123‘;6、刷新：
mysql> FLUSH PRIVILEGES;这步完成后我已经成功解决了问题。如果报错，可以看下面第7步，博主依然给出了解决方案
7、
// 如果报错ERROR 1396 (HY000): Operation ALTER USER failed for ‘root‘@‘%‘：
则是远程访问权限不正确，先选择数据库，查看一下再更改：
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mysql> use mysql;Database changedmysql> select user,host from user;+------------------+-----------+| user | host |+------------------+-----------+| mysql.infoschema | localhost || mysql.session | localhost || mysql.sys | localhost || root | localhost |+------------------+-----------+5 rows in set (0.00 sec) |
原文：https://www.cnblogs.com/xiaowenshu/p/9904766.html