navicat错误1251

　　navicat在连接MySQL8.0及以上版本的时候，总是报错1251；原因是MySQL8.0版本的加密方式和MySQL5.0的不一样，连接会报错。下面就为大家介绍一下详细的解决办法。

推荐教程：MySQL数据库入门视频教程

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：该例子中 123为新密码

mysql> ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123';
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)

　　最后重新启动MySQL服务，在重新连接就行了。

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