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PREVIOUSDAY Function (DAX)

Returns a table that contains a column of all dates representing the day that is previous to the first date in the dates column, in the current context.


PREVIOUSDAY(<dates>)

Term

Definition

dates

A column containing dates.

A table containing a single column of date values.

NoteNote

To understand more about how context affects the results of formulas, see Context in DAX Formulas.

This function determines the first date in the input parameter, and then returns all dates corresponding to the day previous to that first date. For example, if the first date in the dates argument refers to June 10, 2009; this function returns all dates equal to June 9, 2009.

The dates argument can be any of the following:

  • A reference to a date/time column.

  • A table expression that returns a single column of date/time values.

  • A Boolean expression that defines a single-column table of date/time values.

NoteNote

Constraints on Boolean expressions are described in the topic, CALCULATE Function (DAX).

The following sample formula creates a measure that calculates the 'previous day sales' for the Internet sales.

To see how this works, create a PivotTable and add the fields, CalendarYear and MonthNumberOfYear, to the Row Labels area of the PivotTable. Then add a measure, named Previous Day Sales, using the formula defined in the code section, to the Values area of the PivotTable.

=CALCULATE(SUM(InternetSales_USD[SalesAmount_USD]), PREVIOUSDAY('DateTime'[DateKey]))
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