You can display summary data for any column in your table. Summary data may be in the form of various functions, such as:
For example, in a table with a list of stores, grouped by City and Country, you can display the number of stores in each City, and in each Country, using this function.
By default, the summary function for each field is defined by the data source.
Adding a Summary to a Specific Column
In the table, right-click the column you want to calculate a summary for, and select Add Summary.
The summary information is added to the group header, or is added to the bottom of a column if no groups are included in the table.
Removing a Summary from a Specific Column
In the table, right-click the column with the summary you want to remove, and select Remove Summary.
The summary information is removed from the table.