SqlFunctions.DateDiff Method (String, String, Nullable(Of TimeSpan))

.NET Framework (current version)

Returns the count of the specified datepart boundaries crossed between the specified start date and end date.

Namespace:   System.Data.Objects.SqlClient
Assembly:  System.Data.Entity (in System.Data.Entity.dll)

<EdmFunctionAttribute("SqlServer", "DATEDIFF")>
Public Shared Function DateDiff (
	datePartArg As String,
	startDate As String,
	endDate As Nullable(Of TimeSpan)
) As Nullable(Of Integer)


Type: System.String

The part of the date to calculate the differing number of time intervals.

Type: System.String

The first date.

Type: System.Nullable(Of TimeSpan)

The second date.

Return Value

Type: System.Nullable(Of Int32)

The value specifying the number of time intervals between the two dates.

You cannot call this function directly. This function can only appear within a LINQ to Entities query.

This function is translated to a corresponding function in the database. For information about the corresponding SQL Server function, see DATEDIFF (Transact-SQL).

.NET Framework
Available since 4.0
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