datetime_add()

  • Article
  • 09/30/2024

Applies to: ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel

Calculates a new datetime from a specified period multiplied by a specified amount, added to, or subtracted from a specified datetime.

Syntax

datetime_add(period,amount,datetime)

Learn more about syntax conventions.

Parameters

Name Type Required Description
period string ✔️ The length of time by which to increment.
amount int ✔️ The number of periods to add to or subtract from datetime.
datetime datetime ✔️ The date to increment by the result of the period x amount calculation.

Possible values of period:

  • Year
  • Quarter
  • Month
  • Week
  • Day
  • Hour
  • Minute
  • Second
  • Millisecond
  • Microsecond
  • Nanosecond

Returns

A datetime after a certain time/date interval has been added.

Examples

Period

Run the query

print  year = datetime_add('year',1,make_datetime(2017,1,1)),
quarter = datetime_add('quarter',1,make_datetime(2017,1,1)),
month = datetime_add('month',1,make_datetime(2017,1,1)),
week = datetime_add('week',1,make_datetime(2017,1,1)),
day = datetime_add('day',1,make_datetime(2017,1,1)),
hour = datetime_add('hour',1,make_datetime(2017,1,1)),
minute = datetime_add('minute',1,make_datetime(2017,1,1)),
second = datetime_add('second',1,make_datetime(2017,1,1))

Output

year quarter month week day hour minute second
2018-01-01 00:00:00.0000000 2017-04-01 00:00:00.0000000 2017-02-01 00:00:00.0000000 2017-01-08 00:00:00.0000000 2017-01-02 00:00:00.0000000 2017-01-01 01:00:00.0000000 2017-01-01 00:01:00.0000000 2017-01-01 00:00:01.0000000

Amount

Run the query

print  year = datetime_add('year',-5,make_datetime(2017,1,1)),
quarter = datetime_add('quarter',12,make_datetime(2017,1,1)),
month = datetime_add('month',-15,make_datetime(2017,1,1)),
week = datetime_add('week',100,make_datetime(2017,1,1))

Output

year quarter month week
2012-01-01T00:00:00Z 2020-01-01T00:00:00Z 2015-10-01T00:00:00Z 2018-12-02T00:00:00Z