OPENINGBALANCEMONTH

Applies to: Calculated column Calculated table Measure Visual calculation

Note

This function is discouraged for use in visual calculations as it likely returns meaningless results.

Evaluates the expression at the date corresponding to the end of the previous month in the current context.

Syntax

OPENINGBALANCEMONTH(<expression>,<dates>[,<filter>])

Term	Definition
expression	An expression that returns a scalar value.
dates	A column that contains dates.
filter	(optional) An expression that specifies a filter to apply to the current context.

A scalar value that represents the expression evaluated at the first date of the month in the current context.

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.
The filter expression has restrictions described in the topic, CALCULATE function.
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 'Month Start Inventory Value' of the product inventory.

= OPENINGBALANCEMONTH(SUMX(ProductInventory,ProductInventory[UnitCost]*ProductInventory[UnitsBalance]),DateTime[DateKey])