Udemy is a large-scale learning site that usually does not offer formal certifications. You might try Coursera since these courses are university level type courses >
If you want a creditable certificate in Business Intelligence, then you most likely have to pay for a university level program such as Villanova University >
Be advised that most university level programs; especially degree programs (such as Capella University), are very expensive compared to Udemy and Coursera. Good luck.