创建数据库：

输入：CREATE DATABASE itcase;
计算机输出：

Query OK, 1 row affected

查看数据库：
输入：SHOW DATABASES;
计算机输出：

+--------------------+
| Database           |
+--------------------+
| information_schema |
| itcast             |
| mysql              |
| performance_schema |
| test               |
+--------------------+
5 rows in set
查看创建数据库的方式：     
输入：SHOW CREATE DATABASE itcast;
计算机输出：

+----------+----------------------------------------------------------------+
| Database | Create Database                                                |
+----------+----------------------------------------------------------------+
| itcast   | CREATE DATABASE `itcast` /*!40100 DEFAULT CHARACTER SET gbk */ |
+----------+----------------------------------------------------------------+
1 row in set
修改后的数据库：
 输入：ALTER DATABASE itcast DEFAULT CHARACTER SET utf8;
计算机输出：

Query OK, 1 row affectedSHOW CREATE DATABASE itcast;
+----------+-----------------------------------------------------------------+
| Database | Create Database                                                 |
+----------+-----------------------------------------------------------------+
| itcast   | CREATE DATABASE `itcast` /*!40100 DEFAULT CHARACTER SET utf8 */ |
+----------+-----------------------------------------------------------------+
1 row in set
删除数据库：
输入：DROP DATABASE itcast;
计算机输出：

Query OK, 0 rows affected

 

查看数据库：

 输入：SHOW DATABASES;
计算机输出：

+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| performance_schema |
| test               |
+--------------------+
4 rows in set