Sum: The total value is calculated for the selected items.
Average: The average value is calculated for the selected items.
Median: The median value is calculated for the selected items.
Maximum: The largest value is calculated for the selected items.
Minimum: The minimum value is calculated for the selected items.
Array: A list of values is provided. You can also specify a maximum value for this list.
First: The first value is selected from the list.
Last: The last value is selected from the list.
Note: If Array, First, or Last is selected, you must select the join path that relates to an asset, the attribute to use to order the selected items, and a sort direction.