show databases;

databaseをつくったらshow

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| blog               |
| itamae             |
| mysql              |
| owncloud           |
| performance_schema |
| phpmyadmin         |
| wp_yeh             |
+--------------------+
8 rows in set (0.00 sec)