MySQL修改用户名和密码

#mysql修改和设置用户名，密码
设置登录密码：

mysql> set password for root@localhost=password('root');

修改密码
在MySQL或者mariadb安装好后，可能没有设置账号，下面介绍一种方式
1.使用sql语句进行修改

mysql> update user set password=password('root') where user='root' and host='localhost';
Query OK, 1 row affected (0.01 sec)
Rows matched: 1  Changed: 1  Warnings: 0

2.刷新数据库

flush privileges;
Query OK, 0 rows affected (0.00 sec)

mysql> exit;
Bye

3.使用新的用户名和密码登录

mysql -u[用户名] -p[密码]

Warning: Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or g.
Your MySQL connection id is 10
Server version: 5.6.50 MySQL Community Server (GPL)

Copyright (c) 2000, 2020, 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> exit;
Bye

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