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SqlFunctions::DateDiff Method (String, Nullable<DateTime>, Nullable<DateTimeOffset>)

.NET Framework 4.6 and 4.5

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(L"SqlServer", L"DATEDIFF")]
static Nullable<int> DateDiff(
	String^ datePartArg, 
	Nullable<DateTime> startDate, 
	Nullable<DateTimeOffset> endDate


Type: System::String

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

Type: System::Nullable<DateTime>

The first date.

Type: System::Nullable<DateTimeOffset>

The second date.

Return Value

Type: System::Nullable<Int32>
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

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4
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