Networking + Database

I've used Unity for quite a few years and I'm fairly experienced in C#. I have successfully built several games and simulations for Uni, hobby and work. However, networking is something I never honestly explored too much, not sure why it never came up, so I'm a bit green in this area.

I've been doing research on this for the past couple days and I cannot find any useful information.

I've come across many networking middlewares such as:

• Photon

• Smart Fox

• TNet

• Bolt

However, none of them actually show any database capability for multiplayer games. I would love to add a multiplayer aspect to my RPG game, but without a database (such as MySQL) to store important character, world, etc. information it becomes quite impossible. XML, SQLite, etc. are out of the question because they are inefficient and I would like to be able to expand the game.

I'm hoping that someone may have some advice on how to go about this. Thank you very much!