I want to count the number of points from one layer around each point from a different points layer. The thing is that each point (from both layers) has an "entrance date", so I want to count only those points that have an entry date prior to the one relating to.
I have a point with an entry date equal to August 2016, and a second layer of 2 points with an entry date equal to July 2016, and 2 points with an entry date equal to December 2016. All of the points are within 100m of the first point. I want to be able to get the number of points, within 100m radius (in this example), that have an entry date prior to August 2016. In this example, the result would be 2.