I have done it few times. Just run dbconfigwizard whith key /internal. Choose there maintain db, and then chose backup from SQL. After it go the same way to restore on Oracle DB.
But after moving this way check if everythink works good on Oracle DB. I had errors... I had problems in deletting entries from Service Desk. If after moving you'll have the same problem I'll tell you my solution (you'll have to rebuild DB).