Mysql 遇到的一些坑

1.命令行按回车，或是输入\c,quit 都无法结束编辑状态，如图：

出现了”> ,然后不管输入什么都无法退出，这时输入>前的字符作为结束字符,再输入\c，既需要输入 “\c 回车即可

 

2.修改root密码,语法报错

mysql> alert user 'root'@'localhost' IDENTIFIED BY '123456';
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'alert user 'root'@'localhost' IDENTIFIED BY '159263Mysql#'' at line 1

原因就是alert拼错了，应该是alter,无语了....遇到语法错误,好好检查拼写

 

3.重装系统后没有重装mysql

mysql> ALTER user 'root'@'localhost' IDENTIFIED BY '123456' ;

ERROR 1290 (HY000): The MySQL server is running with the --skip-grant-tables option so it cannot execute this statement

mysql> flush privileges;
ERROR 1146 (42S02): Table 'mysql.user' doesn't exist

这两个莫名其妙的错误，应该是我重装系统导致的，重装了C盘，但是mysql装在D盘，所以直接继续用，就出现了一堆乱七八糟的问题。。。

PS:重装C盘后,应该要把D盘的mysql目录删掉，然后重新装一遍mysql，大多软件都如此，很多配置默认写在C盘

 

4.Navicat for mysql连接失败

提示： ERROR 1251: Client does not support authentication protocol requested by server; consider upgrading MySQL client

这是因为mysql8.0的要求的认证插件与Navicat不一致造成的,也就是Navicat太老了

caching_sha2_password是mysql8.0默认的认证插件，而Navicat和一些其他客户端还是用mysql_native_password，所以将root的plugin改成mysql_native_password即可

USE mysql; 
ALTER USER ‘root’@’localhost’ IDENTIFIED WITH mysql_native_password BY ‘831015’; 
FLUSH PRIVILEGES;

 

 

 

 

转载于:https://www.cnblogs.com/kevinWu7/p/10163466.html