The Application Server includes a bundled Java DB server. Java DB is based on the Apache Derby database. You do not have to start the database to perform any other tasks in this Quick Start Guide. However if you would like to start the database for future use, see the following procedure.
Make sure that you are logged in as the user that installed the database.
Run asadmin start-database.
For more information on the start-database command, see the command's help or the start-database(1).