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
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