The Order query subject includes provides the IDs of the order itself and the site visit during which it took place.
The Line Item query subject provides the IDs of individual line items and the orders in which they were included.
The Line Item Facts query subject provides information about an individual line item. Important items to note in this query subject are:
Net Sales—Revenue after adjustments due to discounts, taxes, and shipping, in the reporting currency.
Units—Quantity of this line item ordered.
Discounts—Sum of order-level discounts allocated to this line item + any discounts applied to the specific line item.
Average Selling Price—Average of unit prices across your data set.
The Order regular dimension has one hierarchy, with levels for the order and for line items within that order.
