startofweek()startofweek()

返回包含日期的一周的起点，根据偏移量移动（如提供）。Returns the start of the week containing the date, shifted by an offset, if provided.

一周的起点被视为周日。Start of the week is considered to be a Sunday.

语法Syntax

startofweek(date [,offset])startofweek(date [,offset])

参数Arguments

date：输入日期。date: The input date.
offset：输入日期中的可选偏移周数（整数，默认值为 0）。offset: An optional number of offset weeks from the input date (integer, default - 0).

返回Returns

一个日期/时间，表示给定 date 值的那一周的开始（如果指定了偏移量，则还包含该信息）。A datetime representing the start of the week for the given date value, with the offset, if specified.

示例Example

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