Modify the username and password of the mysql database

Change the database password:

mysql -u root -p  

Enter password：***  

mysql > use mysql; select database  

Database changed   

mysql > UPDATE user SET password=PASSWORD( " new password " ) WHERE user= ' your username ' ;  

mysql> FLUSH PRIVILEGES;  

mysql> quit;  

Change username:

mysql -u root -p  

Enter password：***  

mysql > use mysql; select database  

Database changed  

mysql > update user set user= " new user name "  where user= " root " ; change the user name root to the new user name  

mysql > flush privileges; flush privileges  

mysql> exit