Exadata Cloud@Customer: Configure Oracle Database Character Set and National Character Set

Before you create the database, decide the character set that you want to use.

After a database is created, changing its character set is usually very expensive in terms of time and resources. Such operations may require converting all character data by exporting the whole database and importing it back. Therefore, it is important that you carefully select the database character set at installation time.

For more information, see Using the Console to Create a Database.