Report Builder Functions - VarP Function

Returns the population variance of all non-null numeric values specified by the expression, evaluated in the context of the given scope.

Note

You can create and modify paginated report definition (.rdl) files in Report Builder and in Report Designer in SQL Server Data Tools. Each authoring environment provides different ways to create, open, and save reports and related items.

Syntax


VarP(expression, scope, recursive)  

Parameters

expression
(Integer or Float) The expression on which to perform the aggregation.

scope
(String) Optional. The name of a dataset, group, or data region that contains the report items to which to apply the aggregate function. If scope is not specified, the current scope is used.

recursive
(Enumerated Type) Optional. Simple (default) or RdlRecursive. Specifies whether to perform the aggregation recursively.

Return Type

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

Remarks

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.

The value of scope must be a string constant and cannot be an expression. For outer aggregates or aggregates that do not specify other aggregates, scope must refer to the current scope or a containing scope. For aggregates of aggregates, nested aggregates can specify a child scope.

Expression can contain calls to nested aggregate functions with the following exceptions and conditions:

Example

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

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

See Also

Expression Uses in Reports (Report Builder and SSRS)
Expression Examples (Report Builder and SSRS)
Data Types in Expressions (Report Builder and SSRS)
Expression Scope for Totals, Aggregates, and Built-in Collections (Report Builder and SSRS)