To compute these summaries, the Dashboard uses a summary function calculated against the specified measure.
This topic describes how the Dashboard summarizes measure values by default and lists the available summary functions. You will also learn how to change the default summary type.
For instance, you need to calculate a sum of sales for each dimension value. A sample underlying data source contains the following data.
If you use the Category field as a dimension and the Sales field as a measure with the Sum summary function, the Dashboard will sum all underlying data source values corresponding to 'Beverages' and 'Confections'.
If you use the Max summary function, the maximum value corresponding to each category will be selected.
The following summary functions are available.
Note
Values Null and DBNull are excluded from calculations.
Count

The number of values.

Count Distinct

The number of distinct values.

Sum

The sum of the values.

Min

The smallest value.

Max

The largest value.

Average

The average of the values.

StdDev

An estimate of the standard deviation of a population where the sample is a subset of the entire population.

StdDevP

The standard deviation of a population where the population is the entire data to be summarized.

Var

An estimate of the variance of a population where the sample is a subset of the entire population.

VarP

The variance of a population where the population is the entire data to be summarized.

Median

The median of the values. A median is the number separating the higher half of a value range from the lower half.

Mode

The mode of the values. A mode is the value that is repeated more often than any other.

By default, the Dashboard calculates Sum for numeric measures and Count for measures that contain another type of data. You can change the summary function type in the Dashboard Designer and in code.
Note that changes to the summary type are not available in certain cases.
 You cannot change the summary function type in OLAP mode, because data in a cube is already grouped and summarized.
 Several summary types are not supported for specific data providers in server mode. To learn more, see Data Processing Modes.