Google don't use Oracle or MySQL, they use their own database software known as Bigtable.
In your internet browser search box, type google and hit 'go'
Google is a Search Engine used to find websites that answer what you type into the search box.
My SQL
You can upload a database to Google Docs as a .TXT file. You will preserve the data, but you will lose the database structure.
i think it is bigtable database system which is built on google file system.
datasheet
You could use Google Docs
bigtable
Yes it is. It is a Web Database and has progressively producing more productivity like the Google Android - a operating system for mobiles.
Yes, The mabinogino database is called mabinogiwiki.com Just search it in google