命令行验证MySQL的隔离级别

https://www.bilibili.com/video/BV1eJ411c7rf?p=40

1. Windows 下 cmd 进入命令行：

   C:\Users\Administrator>mysql -uroot -p123456
   

2. 创建一个新用户登录MySQL Server：

   mysql> create user tom identified by 'abc123';
   Query OK, 0 rows affected (0.03 sec)
   

   用户名：tom 密码：abc123
3. 登录tom：

   C:\Users\Administrator>mysql -utom -pabc123
   

4. 查看 root 用户可以操作的数据库：

   mysql> show databases;
   +--------------------+
   | Database           |
   +--------------------+
   | information_schema |
   | db2019             |
   | guns               |
   | jdbc_test          |
   | ke                 |
   | m3u8_download      |
   | mysql              |
   | nacos_config       |
   | performance_schema |
   | sakila             |
   | seata              |
   | seata_account      |
   | seata_order        |
   | seata_storage      |
   | sql                |
   | sys                |
   | world              |
   +--------------------+
   17 rows in set (0.00 sec)
   

5. 查看 tom 用户可以操作的数据库：

   mysql> show databases;
   +--------------------+
   | Database           |
   +--------------------+
   | information_schema |
   +--------------------+
   1 row in set (0.00 sec)