Navicat连接mysql报错1251

Navicat无法连接MySQL8,是因为MySQL8的方式和MySQL5的加密方式不一样导致

解决方案: 

1.通过命令行进入mysql数据库:

 C:Windowssystem32> mysql -uroot -p

2.更改加密方式：

mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY 'password' PASSWORD EXPIRE NEVER;

3.更改新密码：

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

4.刷新：

mysql> FLUSH PRIVILEGES;

如果报错: ERROR 1396 (HY000): Operation ALTER USER failed for 'root'@'localhost'

检查一下数据库和用户是否正确

mysql> use mysql;
Database changed
mysql> select user,host from user;