What's Android database files structure

i'm trying to deal with Android since few weeks. And i'm now trying to access media databases files like photo, music, videos,settings,installed application开发者_运维技巧s stored in the phone. What's these files paths? I've already find contacts, bookmarks, sms files under "/data/data/com.android.providers" structure. Can someone tell me the whole database structure?

your databases are under /data/data/[your package name]/databases/[your database name] although you should usually not be trying to access these

edit

adamcodes is right, corrected