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

Async variant of Variance.

Namespace:  SD.LLBLGen.Pro.LinqSupportClasses
Assembly:  SD.LLBLGen.Pro.ORMSupportClasses (in SD.LLBLGen.Pro.ORMSupportClasses.dll) Version: 5.10.0.0 (5.10.0)
Syntax
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public static Task<double> VarianceAsync<TSource, TColumnType>(
	this IQueryable<TSource> source,
	Expression<Func<TSource, TColumnType>> selector,
	bool applyDistinct
)

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 variance is applied on

Type Parameters

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

Return Value

Type: TaskDouble
The variance 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).
See Also