VarP Function (Reporting Services)

Returns the population variance of all non-null values of the specified expression.


VarP(Expression, Scope)


  • Expression
    An expression that evaluates to numeric data on which to perform the aggregation. The expression cannot contain aggregate functions.
  • Scope
    (String) The name of a dataset, grouping, or data region that contains the report items to which to apply the aggregate function. If Scope is specified, the aggregate function applies to all data in the dataset, grouping, or data region. For more information about the Scope parameter, see Using Report Functions in Expressions (Reporting Services).

Return Type

Returns a Decimal for decimal expressions and a Double for all other expressions.


The set of data specified in the expression must have the same data type. To convert data that has multiple numeric data types to the same data type, use conversion functions like CInt, CDbl or CDec. For more information, see Type Conversion Functions.

Scope cannot be an expression.


The following code example provides a population variance of line item totals in the Order grouping or data region.

VarP(Fields!LineTotal.Value, "Order")

See Also


Creating Expressions in Reporting Services

Help and Information

Getting SQL Server 2005 Assistance