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) 
weekStartweekStart
2016-12-25 00:00:00.00000002016-12-25 00:00:00.0000000
2017-01-01 00:00:00.00000002017-01-01 00:00:00.0000000
2017-01-08 00:00:00.00000002017-01-08 00:00:00.0000000