Using the ADDCOLUMNS DAX Expression in the CALENDAR TABLE
In Power BI, the ADDCOLUMNS function is used in the Data Analysis Expressions (DAX) language to add new columns to a table as part of a calculated table or calculated column. It allows you to create new columns based on calculations or expressions, and these columns become part of your data model.
ADDCOLUMNS is a powerful function in Power BI as it allows you to create new columns based on complex calculations, aggregations, or other transformations, which can be very useful for creating custom measures or for enhancing your data model for better analysis and reporting.: