Aggregation: Integral

I have sensor data from a gyroscope, which shows the current rotational velocity in degrees per second (this unit is missing from the list of units, though, as is pascals). Now, I would suppose the aggregate “integral” would integrate these measurements, so that I could show an absolute angle. However, I don’t see any real difference between selecting “mean” and “integral”.

I guess integral doesn’t work the way I thought it does - is what I need at all possible?