Hi Girishchandra Y,
Yes, we support both OpenStreetMap (online) and loading local tiles from disk.
Also, if you want to use your own, local tiles from disk, please see this section from our documentation on how to do that.
Please let us know if this answers your question.
I had initially replied that it cannot be done, but in fact this can be done. We provide a method on the ImageTiledLayer base class to provide a QByteArray of data for the tiles. You should be able to use this method to load your images directly from the database.
Sorry for the confusion. Let us know if that works for you.