startofmonth()

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

Returns the start of the month containing the date, shifted by an offset, if provided.

Syntax

startofmonth(date [, offset ])

Name	Type	Required	Description
date	`datetime`	✔️	The date for which to find the start of month.
offset	`int`		The number of months to offset from the input date. The default is 0.

A datetime representing the start of the month for the given date value, with the offset, if specified.

range offset from -1 to 1 step 1
| project monthStart = startofmonth(datetime(2017-01-01 10:10:17), offset)

Output