Unity MySQL Database?

Hey !! I'm Programming a game with Unity and someone told me that Unity can use an internal Database. Until now i tried to create a local MySQL Database which just hasn't worked so I ended up putting everything in the MySQL installation Folder in my Unity Project... but my question is if there is a way to create a simple MySQL Database in Unity without using external resources. Just Unity if you know what i mean !!

all it has to do is that it can create an existing Database from SQL Files and Read and Write Values as Usual. And something that's not really neccessary but would be easy for me if you can access this database with Navicat !! i still have to configure the Database and set Data in it.

I Really hope you can help me as soon as possible

PS: If you write any Code it would be perfect if you do it für C# !!