Is it possible to get CPL without having a SPL and PPL? I'm currently studying in 12th.

Yes, you can. Apply for CPL without having SPL or PPL. The only condition is that you should have Physics and Maths as subjects in class 12th. You have to join flying academy for flight training and completion of flying hours. After class 12th, you can pursue CPL course.

Hi, Student Pilot License (SPL) and Private Pilot License (PPL) are intermediate stages before you finally attain Commercial Pilot License (CPL). Although its your own personal choice to get a PPL issued after you complete the qualification for the same or you may choose to continue flying on SPL

Well, SPL is the first stage of a pilot's career. This is the order- SPL PPL CPL ATPL