mysql -uroot -p

select version();

show databases;

 select user,host from user;

alter user 'root'@'%' identified by '1234';

flush privileges;

Microsoft Windows [版本 10.0.19045.2251]
(c) Microsoft Corporation。保留所有權(quán)利。

C:\Users\cj>mysql -uroot -p
Enter password: ****
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 5707
Server version: 8.0.33 MySQL Community Server - GPL

Copyright (c) 2000, 2023, Oracle and/or its affiliates.

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> select version();
+-----------+
| version() |
+-----------+
| 8.0.33    |
+-----------+
1 row in set (0.00 sec)

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| dongtou            |
| guozi              |
| information_schema |
| jinkai             |
| kunshan            |
| kunshan02          |
| kunshan03          |
| membership_system  |
| mysql              |
| performance_schema |
| sys                |
+--------------------+
11 rows in set (0.53 sec)

mysql> use mysql;
Database changed
mysql>  select user,host from user;
+------------------+-----------+
| user             | host      |
+------------------+-----------+
| root             | %         |
| mysql.infoschema | localhost |
| mysql.session    | localhost |
| mysql.sys        | localhost |
+------------------+-----------+
4 rows in set (0.61 sec)

mysql> alter user 'root'@'%' identified by '1234';
Query OK, 0 rows affected (1.12 sec)

mysql> alter user 'root'@'%' identified by '1234';
Query OK, 0 rows affected (0.44 sec)

mysql> flush privileges;
Query OK, 0 rows affected (1.43 sec)

mysql>