Duration Data Type in Dynamics NAV

 Represents the difference between two DateTimes. This value can be negative. It is stored as a     64-bit integer. The integer value is the number of milliseconds during the duration.

The following are examples of durations:

DATETIME-DATETIME=DURATION

DATETIME-DURATION=DATETIME

DATETIME+DURATION=DATETIME

This example is run on a computer with the Current Format in the Regional and Language

Variable	DataType
DateTime1	DateTime
Datetime2	DateTime
Duration	Duration

DateTime1 := CREATEDATETIME(010109D, 080000T); // January 1, 2009 at 08:00:00 AM DateTime2 := CREATEDATETIME(050509D, 133001T); // May 5, 2009 at 1:30:01 PM Duration := DateTime2 - DateTime1; MESSAGE(FORMAT(Duration));