What database do we use?

Does anyone know if the default RDMS is Microsoft or Oracle SQL?
The Logs, details below along with other clues indicate the back end is Oracle. Would appreciate it if anyone could kindly let me know as this is a first time experience for me.

Database Name ProOptimized3
Database Region US East 1

@Shumon, I think they use a MySQL database server. I know this because I asked support, and one of the executives told me.

@christopher93 Are you sure, because I just need it for system documentation reference that’s all. I would be surprise if it is MySQL because everything has been so stable and secure. Impressive if that is the case. Its the Logs that indicate Oracle but mind you I am referring to how things were 20 years ago so perhaps its a standard feature these days.

This might give a clue, although explicitly it is not said MySQL is actually used.

Thanks @Peter I agree with you.