The timespan data type

The timespan data type represents a time interval.

The timespan and time data types are equivalent.

timespan literals

To specify a timespan literal, use one of the following syntax options:

Syntax	Description	Example	Length of time
nd	A time interval represented by one or more digits followed by d for days.	2d	2 days
nh	A time interval represented by one or more digits followed by h for hours.	1.5h	1.5 hours
nm	A time interval represented by one or more digits followed by m for minutes.	30m	30 minutes
ns	A time interval represented by one or more digits followed by s for seconds.	10s	10 seconds
nms	A time interval represented by one or more digits followed by ms for milliseconds.	100ms	100 milliseconds
nmicrosecond	A time interval represented by one or more digits followed by microsecond.	10microsecond	10 microseconds
ntick	A time interval represented by one or more digits followed by tick to indicate nanoseconds.	1tick	100 ns
timespan(n seconds)	A time interval in seconds.	timespan(15 seconds)	15 seconds
timespan(n)	A time interval in days.	timespan(2)	2 days
timespan(days.hours:minutes:seconds.milliseconds)	A time interval in days, hours, minutes, and seconds passed.	timespan(0.12:34:56.7)	0d+12h+34m+56.7s
timespan(null)	Represents the null value.

Learn more about syntax conventions.

timespan operators

Two values of type timespan may be added, subtracted, and divided. The last operation returns a value of type real representing the fractional number of times one value can fit the other.

Examples

The following example calculates how many seconds are in a day in several ways:

print
    result1 = 1d / 1s,
    result2 = time(1d) / time(1s),
    result3 = 24 * 60 * time(00:01:00) / time(1s)

This example converts the number of seconds in a day (represented by an integer value) to a timespan unit:

print 
    seconds = 86400
| extend t = seconds * 1s

Related content

• totimespan()