EdmFunctions.StDevP Method (DbExpression)

 

Creates a DbFunctionExpression that invokes the canonical 'StDevP' function over the population of the specified collection. The result type of the expression is Edm.Double.

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

[SuppressMessageAttribute("Microsoft.Naming", "CA1709:IdentifiersShouldBeCasedCorrectly", 
	MessageId = "St")]
public static DbFunctionExpression StDevP(
	this DbExpression collection
)

Parameters

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

An expression that specifies the collection for which the standard deviation should be computed.

Return Value

Type: System.Data.Entity.Core.Common.CommandTrees.DbFunctionExpression

A new DbFunctionExpression that produces the standard deviation value.

Exception Condition
ArgumentNullException

collection is null.

ArgumentException

No overload of the canonical 'StDevP' function accepts an argument with the result type of collection.