For the first time, I am capturing temperatures in my underground pump house and using that data to turn heat lamps on/off. At the end of winter, I'd like to do some analysis of how quickly I'm loosing heat and how quickly my current system of lamps can recover at various outside temperatures.

I have been watching the charts, but is access to the underlying database possible? I'm only looking at a couple sensors, but don't have SQL experience. Suggestions for how best to access the data?