datetime_diff()
Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer ✅ Azure Monitor ✅ Microsoft Sentinel
Calculates the number of the specified periods between two datetime values.
Syntax
datetime_diff(period,datetime1,datetime2)
Learn more about syntax conventions.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| period | string |
✔️ | The measurement of time used to calculate the return value. See possible values. |
| datetime1 | datetime |
✔️ | The left-hand side of the subtraction equation. |
| datetime2 | datetime |
✔️ | The right-hand side of the subtraction equation. |
Possible values of period
These values are case insensitive:
- Year
- Quarter
- Month
- Week
- Day
- Hour
- Minute
- Second
- Millisecond
- Microsecond
- Nanosecond
Returns
An integer that represents the amount of periods in the result of subtraction (datetime1 - datetime2).
Example
print
year = datetime_diff('year',datetime(2017-01-01),datetime(2000-12-31)),
quarter = datetime_diff('quarter',datetime(2017-07-01),datetime(2017-03-30)),
month = datetime_diff('month',datetime(2017-01-01),datetime(2015-12-30)),
week = datetime_diff('week',datetime(2017-10-29 00:00),datetime(2017-09-30 23:59)),
day = datetime_diff('day',datetime(2017-10-29 00:00),datetime(2017-09-30 23:59)),
hour = datetime_diff('hour',datetime(2017-10-31 01:00),datetime(2017-10-30 23:59)),
minute = datetime_diff('minute',datetime(2017-10-30 23:05:01),datetime(2017-10-30 23:00:59)),
second = datetime_diff('second',datetime(2017-10-30 23:00:10.100),datetime(2017-10-30 23:00:00.900)),
millisecond = datetime_diff('millisecond',datetime(2017-10-30 23:00:00.200100),datetime(2017-10-30 23:00:00.100900)),
microsecond = datetime_diff('microsecond',datetime(2017-10-30 23:00:00.1009001),datetime(2017-10-30 23:00:00.1008009)),
nanosecond = datetime_diff('nanosecond',datetime(2017-10-30 23:00:00.0000000),datetime(2017-10-30 23:00:00.0000007))
Output
| year | quarter | month | week | day | hour | minute | second | millisecond | microsecond | nanosecond |
|---|---|---|---|---|---|---|---|---|---|---|
| 17 | 2 | 13 | 5 | 29 | 2 | 5 | 10 | 100 | 100 | -700 |