MySQL database renamed to change your password

• Change password (old version):

    mysql -u root -p  
    Enter password：***  
    mysql>use mysql;      --选择数据库-- 
    Database changed   
    mysql> UPDATE user SET password=PASSWORD("新密码") WHERE user='你的用户名';  mysql> FLUSH PRIVILEGES;  mysql> quit; 

• When newly installed MySQL5.7, prompts password error, the installation does not change the password, then change the password-free login password, the input

    update mysql.user  set password=password('root') where user='root'；

  prompt

    ERROR 1054 (42S22): Unknown column 'password' in 'field list'，

  The original is a mysql database has no password this field of, password field into a authentication_string

• So change the sentence is replaced

    update mysql.user set authentication_string=password('root') where user='root'；

• Change Username:

    mysql -u root -p  
    Enter password：***  
    mysql> use mysql;          --选择数据库--
    Database changed  
    mysql> update user set user="新用户名" where user="root"; --将用户名为root的改为新用户名--  mysql> flush privileges; --刷新权限--  mysql> exit

 

This article Source: https://www.cnblogs.com/renxiuxing/p/9053910.html