>Select an aggregate min, max over a period of time for a given category along with the other columns linked to min/max. The min/max aggregations over a period

>Select an aggregate min, max over a period of time for a given category along with the other columns linked to min/max. The min/max aggregations over a period of time per category is pretty straight forward (aggregating rows), but what do you mean by "along with the other columns linked to min/max"? How would other columns come into play after aggregating rows?