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SAMEPERIODLASTYEAR Function

Topic Status: Some information in this topic is preview and subject to change in future releases. Preview information describes new features or changes to existing features in Microsoft SQL Server 2016 Community Technology Preview 2 (CTP2).

Returns a table that contains a column of dates shifted one year back in time from the dates in the specified dates column, in the current context.

SAMEPERIODLASTYEAR(<dates>)

Term

Definition

dates

A column containing dates.

A single-column table of date values.

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.

Note Note

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

The dates returned are the same as the dates returned by this equivalent formula:

DATEADD(dates, -1, year)

This DAX function is not supported for use in DirectQuery mode. For more information about limitations in DirectQuery models, see  http://go.microsoft.com/fwlink/?LinkId=219172.

The following sample formula creates a measure that calculates the previous year sales of the Reseller sales.

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

=CALCULATE(SUM(ResellerSales_USD[SalesAmount_USD]), SAMEPERIODLASTYEAR(DateTime[DateKey]))
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