navicat连接mysql报错1251解决方案

今天使用 MySQL8.0，发现Navicat连接不上，总是报错1251；百度发现https://blog.csdn.net/xdmfc/article/details/80263215博客写的找到原因，然后连接成功了：

1.先通过命令行进入 mysql 的root账户：

PS C:\Windows\system32> mysql -uroot -p

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>

2.更改加密方式：

mysql>  ALTER USER 'root' @ 'localhost' IDENTIFIED  BY 'password' PASSWORD EXPIRE NEVER;
Query OK, 0  rows affected (0.10 sec)

3.更改密码：9527

mysql>  ALTER USER 'root' @ 'localhost' IDENTIFIED  WITH mysql_native_password  BY '9527' ;
Query OK, 0  rows affected (0.35 sec)

4.刷新：

mysql> FLUSH  PRIVILEGES ;
Query OK, 0  rows affected (0.28 sec)

// 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：

mysql> use mysql;
Database changed

mysql>  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)

Navicat 连接MySQL的密码就是上面更改的新密码（如9527），也是MySQL的登录密码