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QueryableExtensionMethods.StandardDeviationAsync<TSource, TColumnType> Method (IQueryable<TSource>, Expression<Func<TSource, TColumnType>>)
Async variant of StandardDeviation.

Namespace:  SD.LLBLGen.Pro.LinqSupportClasses
Assembly:  SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.3.0.0 (5.3.0)
Syntax
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public static Task<double> StandardDeviationAsync<TSource, TColumnType>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TColumnType>> selector
)

Parameters

source
Type: System.Linq.IQueryable<TSource>
The source.
selector
Type: System.Linq.Expressions.Expression<Func<TSource, TColumnType>>
The selector.

Type Parameters

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

Return Value

Type: Task<Double>
The standard deviation over the values 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 IQueryable<TSource>. 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).
Remarks
doesn't apply DISTINCT. If you want the standard deviation over only distinct values, use the overload which accepts a boolean.
See Also