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Trifacta Dataprep


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This example shows you the functions that can be used to calculate the number of days between two input dates:

  • DATEDIF - Calculates difference between two input dates for a specified unit of measure. In this example, the unit of measure is day. See DATEDIF Function.
  • NETWORKDAYS - Calculates number of working days between two input dates, assuming a Monday - Friday workweek. See NETWORKDAYS Function.
  • NETWORKDAYSINTL - Calculates number of working days between two input dates with optional specified workweek. see NETWORKDAYSINTL Function.
  • WORKDAY - Calculates the date of a working day that is a specified number of working days before or after a specified date. See WORKDAY Function.
  • WORKDAYINTL - Calculates the date of a working day that is a specified number of working days before or after a specified date, factoring in an optional set of workday schedule for the week. See WORKDAYINTL Function.


Source:

The following dataset contains two columns of dates.

  • The first column values are constant. This date falls on a Monday.
Date1Date2
2020-03-092020-03-13
2020-03-092020-03-06
2020-03-092020-03-16
2020-03-092020-03-23
2020-03-092020-04-10
2020-03-092021-03-10

Transformation:

The first transformation calculates the number of raw days between the two dates: 

Transformation Name New formula
Parameter: Formula type Single row formula
Parameter: Formula datedif(Date1, Date2, day)
Parameter: New column name 'datedif'

This step computes the number of working days between the two dates. Assumptions:

  • Workweek is Monday - Friday.
  • There are no holidays.

Transformation Name New formula
Parameter: Formula type Single row formula
Parameter: Formula networkdays(Date1, Date2, [])
Parameter: New column name 'networkDays'

For some, March 17 is an important date, especially if you are Irish. To add St. Patrick's Day to the list of holidays, you could add the following transformation:

Transformation Name New formula
Parameter: Formula type Single row formula
Parameter: Formula networkdays(Date1, Date2, ['2020-03-17'])
Parameter: New column name 'networkDaysStPatricks'

In the following transformation, the NETWORKDAYSINTL function is applied so that you can specify the working days in the week:

Transformation Name New formula
Parameter: Formula type Single row formula
Parameter: Formula networkdaysintl(Date1, Date2, '1000011', [])
Parameter: New column name 'networkDaysIntl'

The following two functions enable you to calculate a specific working date based on an input date and integer number of days before or after it. In the following, the date that is five working days before the Date2 column is computed:

Transformation Name New formula
Parameter: Formula type Single row formula
Parameter: Formula workday(Date2, -5)
Parameter: New column name 'workday'

Suppose you wish to factor in a four-day workweek, in which Friday through Sunday is considered the weekend:

Transformation Name New formula
Parameter: Formula type Single row formula
Parameter: Formula workdayintl(Date2, -5,'0000111')
Parameter: New column name 'workdayintl'

Results:

Date1Date2workdayintlworkdaynetworkDaysIntlnetworkDaysStPatricksnetworkDaysdatedif
2020-03-092020-03-132020-03-052020-03-064554
2020-03-092020-03-062020-02-272020-02-28nullnullnull-3
2020-03-092020-03-162020-03-152020-03-094667
2020-03-092020-03-232020-03-122020-03-168101114
2020-03-092020-04-102020-04-022020-04-0320242532
2020-03-092021-03-102021-03-022021-03-03210262263366

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