How to add additional aggregate rows to a column
After you create a single aggregate value for a column, you can add up to two more aggregate values for the same column. For an order total column, for example, you can create a sum of all the values, count all the values, and get the average order total.
1 To add an aggregate value, select a column that contains an aggregate value. Choose Aggregation from the context menu.
2 On Aggregation, choose Add Aggregation.
An additional section appears on Aggregation, shown in
Figure 5‑16.
3 Create the second aggregate value and choose OK.
