How do I save information to a MySQL DB? (VaRest)

I asked this question on answer HUB but haven’t gotten an answer yet so I thought I would throw it here.

So I followed tutorials and I am able to receive information from my DB but I can’t find any tuts on saving info to that database. I am using VaRest. As an example I have a column for kills. I can call that from the db but I don’t know how to add +1 kill to the database once a player gets a kill.