EdmFunctions.Var Method (DbExpression)

.NET Framework (current version)
 

Creates a DbFunctionExpression that invokes the canonical 'Var' function over the non-null members of the specified collection. The result type of the expression is Edm.Double.

Namespace:   System.Data.Common.CommandTrees.ExpressionBuilder
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

public static DbFunctionExpression Var(
	this DbExpression collection
)

Parameters

collection
Type: System.Data.Common.CommandTrees.DbExpression

An expression that specifies the collection for which the statistical variance should be computed.

Return Value

Type: System.Data.Common.CommandTrees.DbFunctionExpression

A new DbFunctionExpression that produces the statistical variance value for the non-null members of the collection.

Exception Condition
ArgumentNullException

collection

ArgumentException

collection

.NET Framework
Available since 4.5
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