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.
|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.
Constraints on Boolean expressions are described in the topic, CALCULATE.
The dates returned are the same as the dates returned by this equivalent formula:
DATEADD(dates, -1, year)
This function is not supported for use in DirectQuery mode when used in calculated columns or row-level security (RLS) rules.
The following sample formula creates a measure that calculates the previous year sales of Reseller sales.
= CALCULATE(SUM(ResellerSales_USD[SalesAmount_USD]), SAMEPERIODLASTYEAR(DateTime[DateKey]))