When selecting Download Database Totals, aggregations are disabled for all the sections dependent on the Results with database totals. This feature protects users from performing aggregations, where the results maybe double counted. Enabling the option Allow Relational Aggregation allows usage of aggregation in the following sections:
Break/Grand Totals in Results section
Data Functions, Totals, Cume in Pivot
Data Functions in Chart
Data Functions, Break Totals, Show Column Totals in Report.
To set relational aggregation: