They share some similarities but are more powerful and expansive. DB entries can be indexed by multiple keys to create arrays DB_Foo(x, y, z, ...), and most notably DB entry modifications cause events to fire, so you can catch on them.
If you haven't checked it out, the
Osiris Overview has some good information and Larian made two tutorial videos for scripting databases that are helpful:
Scripting Databases(1)Scripting Databases(2)