EdmFunctions.Var(DbExpression) Method

Reference

Definition

Namespace:: System.Data.Common.CommandTrees.ExpressionBuilder

Assembly:: System.Data.Entity.dll

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

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.

public:
[System::Runtime::CompilerServices::Extension]
 static System::Data::Common::CommandTrees::DbFunctionExpression ^ Var(System::Data::Common::CommandTrees::DbExpression ^ collection);

public static System.Data.Common.CommandTrees.DbFunctionExpression Var (this System.Data.Common.CommandTrees.DbExpression collection);

static member Var : System.Data.Common.CommandTrees.DbExpression -> System.Data.Common.CommandTrees.DbFunctionExpression

<Extension()>
Public Function Var (collection As DbExpression) As DbFunctionExpression

Parameters

collection: DbExpression

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

Returns

DbFunctionExpression

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

Exceptions

ArgumentNullException

collection is null.

ArgumentException

collection is invalid.

Applies to

Поділитися через