OPENINGBALANCEYEAR Function (DAX)
Evaluates the expression at the first date of the year in the current context.
An expression that returns a scalar value.
A column that contains dates.
(optional) An expression that specifies a filter to apply to the current context.
(optional) A literal string with a date that defines the year-end date. The default is December 31.
To understand more about how context affects the results of formulas, see Context in DAX Formulas.
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 Function (DAX).
The filter expression has restrictions described in the topic, CALCULATE Function (DAX).
The year_end_date parameter is a string literal of a date, in the same locale as the locale of the client where the workbook was created. The year portion of the date is ignored.
The following sample formula creates a measure that calculates the 'Year Start Inventory Value' of the product inventory.
To see how this works, create a PivotTable and add the field, CalendarYear, to the Row Labels area of the PivotTable. Then add a measure, named Year Start Inventory Value, using the formula defined in the code section, to the Values area of the PivotTable.