How to aggregate data
1 Select the column containing the data to aggregate. From the right-arrow menu, choose Aggregation. Aggregation appears. The syntax of the selected function appears in the lower part of Aggregation, as shown in Figure 4-14. From the Select Function menu, select the aggregate function to use.
2 Specify a sort direction for the resulting aggregation. If you select Ascending or Descending from the Sort drop-down list, the groups appear, in ascending or descending order in the report. Select none if you do not want to sort the groups in any order.Figure 4-14 Aggregating the Total column as an average
n Select table level to aggregate data across all the rows in the table. Select either header or footer as the location in which to display the aggregate data.
n Select a group from the next drop-down list to aggregate data at the group level. Select either header or footer as the location in which to display the aggregate data.
5 To create a second aggregation, choose Add aggregation. Repeat Step 3 to Step 4 to define the aggregation. Choose OK. Figure 4-15 shows the three aggregations defined for the report.