QueryableExtensionMethodsStandardDeviationAsyncTSource, TColumnType Method (IQueryableTSource, ExpressionFuncTSource, TColumnType, Boolean)

Async variant of StandardDeviation.

Namespace: SD.LLBLGen.Pro.LinqSupportClasses
Assembly: SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.5.0.0 (5.5.18.1019)

Syntax

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public static Task<double> StandardDeviationAsync<TSource, TColumnType>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TColumnType>> selector,
	bool applyDistinct
)

<ExtensionAttribute>
Public Shared Function StandardDeviationAsync(Of TSource, TColumnType) ( 
	source As IQueryable(Of TSource),
	selector As Expression(Of Func(Of TSource, TColumnType)),
	applyDistinct As Boolean
) As Task(Of Double)

Parameters

source: Type: System.LinqIQueryableTSource
The source.
selector: Type: System.Linq.ExpressionsExpressionFuncTSource, TColumnType
The selector.
applyDistinct: Type: SystemBoolean
if set to true, DISTINCT is applied on the set the standarddeviation is applied on

Type Parameters

TSource: The type of the source.
TColumnType: The type of the column type.

Return Value

Type: TaskDouble
The standard deviation over the values (distinct values if applyDistinct is true) in the column specified by selector.

Usage Note

In Visual Basic and C#, you can call this method as an instance method on any object of type IQueryableTSource. When you use instance method syntax to call this method, omit the first parameter. For more information, see Extension Methods (Visual Basic) or Extension Methods (C# Programming Guide).

Reference

QueryableExtensionMethods Class

StandardDeviationAsync Overload

SD.LLBLGen.Pro.LinqSupportClasses Namespace