First download the database setup scripts. Unzip the zip. Start the command and switch to the unzipped folder and run
setup.bat $systemUserName $systemUserPassword $tnsnames.ora.key $omsCubeUserName $omsCubeUserPassword
$systemUserName = username of the oracle system user $systemUserPassword = password of the oracle system user $tnsnames.ora.key = The database key in your tnsnames.ora $omsCubeUserName = The username of the new generated omscube scheme user. $omsCubeUserPassword = The password of the new generated omscube scheme user.