MySQL是一種開源的關系型數據庫管理系統，它被廣泛應用于各種應用程序的數據存儲和管理。當我們打開MySQL時，我們將看到以下內容：

Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 3
Server version: 5.7.22 MySQL Community Server (GPL)
Copyright (c) 2000, 2018, 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>

這是MySQL監視器的歡迎界面，我們可以在MySQL監視器中執行各種SQL命令。下面是一些基本命令，您可以在MySQL監視器中嘗試：

mysql> SHOW DATABASES;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set (0.00 sec)
mysql> CREATE DATABASE mydatabase;
Query OK, 1 row affected (0.00 sec)
mysql> USE mydatabase;
Database changed
mysql> CREATE TABLE mytable (
-> id INT,
-> name VARCHAR(255),
-> age INT
-> );
Query OK, 0 rows affected (0.00 sec)
mysql> INSERT INTO mytable (id, name, age) VALUES (1, 'Alice', 18);
Query OK, 1 row affected (0.00 sec)
mysql> SELECT * FROM mytable;
+------+------+-----+
| id   | name | age |
+------+------+-----+
| 1    | Alice|  18 |
+------+------+-----+
1 row in set (0.00 sec)

這些基本命令可以幫助您開始使用MySQL，嘗試在您的本地計算機上安裝MySQL，并使用這些命令創建您自己的數據庫和表。祝你好運！