Worksheet Properties dialog: Aggregation tab

Use this tab to control how Discoverer populates cells for aggregated values (sometimes referred to as roll-up values) for the current worksheet.

For more information, see:

"What are aggregated values in Discoverer"

"What are linear and non-linear totals"

"Examples of worksheet aggregation in Discoverer"

If Discoverer cannot compute an aggregated cell value, how should the cell be populated?

Use these options to specify how you want Discoverer to populate cells for aggregated values. If you clear the Use the aggregation behavior selected by the Discoverer manager check box, the options beneath become active.

Use the aggregation behavior selected by the Discoverer manager

Use this check box to control whether you specify how Discoverer calculates aggregated values, or whether you accept the default Discoverer behavior specified for you by the Discoverer manager, as follows:

• Select this check box if you want the Discoverer manager to specify how Discoverer calculates aggregated values. The options show which aggregation behavior the Discoverer manager has specified for you.

  Note: This is the recommended option. To avoid getting non-meaningful results, do not clear this check box unless you are advised to do so by the Discoverer manager.

• Clear this check box to specify how Discoverer calculates aggregated values by selecting one of the options. If you clear this check box, ensure that you get the worksheet results that you expect if you select a different aggregation option to the default aggregation option.

Aggregation options

If you clear the Use the aggregation behavior selected by the Discoverer manager check box, use these options to manually control how Discoverer populates cells for aggregated values.

• Show the aggregated value computed by the database. The database uses the same aggregation method as Discoverer

  Use this option if you want Discoverer to compute an aggregated value by adding up data points and applying the calculation to the result. For an example, see "Example 1: Example of a Rank calculation using an Oracle9i or later database".

  Note: This option is not available for scheduled workbook result sets.

• Show values that cannot be aggregated as: <Non-aggregable label>

  Use this option if you want Discoverer to display the non-aggregable label (for example, N.A.) for certain specific non-linear calculations that cannot be aggregated.

  The non-aggregable label is the display text that you specify on the "Worksheet Properties dialog: Sheet/Crosstab Format tab" (that is, choose Edit | Worksheet Properties).

• Show the sum of the values displayed in the contributing cells

  Use this option when you want Discoverer to compute an aggregated value by simply adding up a series of data points.

Notes

• For an example of a Discoverer worksheet that includes repeated values, see "Example 2: Example showing how Discoverer does not aggregate repeated values using an Oracle9i or later database".

Notes on aggregation when sharing worksheets between Discoverer Desktop and Discoverer Plus Relational/Viewer users

This section explains how Discoverer computes aggregated values if you share Discoverer worksheets with other Discoverer Desktop or Discoverer Plus Relational/Viewer users.

Note: If a potential fan trap situation exists, ensure that Discoverer users specify the same fan trap settings (for more information, see "Options dialog: Advanced tab").

About sharing a Discoverer worksheet between Discoverer Plus Relational users

To ensure that a Discoverer worksheet contains the same aggregated values regardless of which Discoverer Plus Relational user opens it, do one or both of the following:

• Explicitly set the aggregation option on the Aggregation tab (that is, clear the Use the aggregation behavior selected by the Discoverer manager check box and select one of the options)

• Ensure that the Discoverer manager has specified the same default Aggregation option (that is, the EnhancedAggregationStrategy preference) on all Discoverer middle-tier systems being used

About sharing a Discoverer worksheet between Discoverer Plus Relational and Discoverer Desktop users

To share a Discoverer worksheet between Discoverer Plus Relational and Discoverer Desktop, note the following:

• if a worksheet created in Discoverer Plus Relational is opened in Discoverer Desktop, Discoverer Desktop displays the same aggregated values

• if a worksheet created in Discoverer Plus Relational (and the Show the aggregated value computed by the database. The database uses the same aggregation method as Discoverer option is selected) is opened in Discoverer Desktop, Discoverer Desktop displays the non-aggregable label by default

• if a worksheet created in Discoverer Desktop is opened in Discoverer Plus Relational, Discoverer Plus Relational uses the same aggregation behavior as specified in Discoverer Desktop