Restoring old WhatsApp data

Is it possible to restore an old WA backup from my old phone (from a year ago)? I found that phone's files which I've saved to my PC, there's some backup ih Whatsapp/Database folder, that's what it looks like... My question is, having in mind that I don't have that old phone with me, and I also have a new WA number/account on my new phone, so, that old account is completely gone, would it be possible to restore anything to my new phone having just those files?