Configuring your Database prior to Installation 15 Selecting Character Sets Using SQL Scripts When you create your database using scripts, your script should look similar to that shown below. Modifying Unicode Character Sets in an Existing Database To modify Unicode character sets in an existing database: 1.    Shut down the database, using either a SHUTDOWN IMMEDIATE or a SHUTDOWN NORMAL state- ment. 2.    Do a full backup of the database because the ALTER DATABASE CHARACTER SET statement can- not be rolled back. 3.    Complete the statements shown in the figure below. Configuring an Oracle Schema You will have to configure an Oracle schema if you are: • Installing Web TimeSheet on Oracle, or • Moving your data to a different Oracle database during a Web TimeSheet upgrade. If you are upgrading in place, an Oracle schema already exists, so you do not need to configure a new one. You can choose to either: