Power BI DAX DISTINCT function to remove duplicates from column or table expressions
The distinct function operates within data transformation theory to enforce set uniqueness by filtering result sets based on column values or table expressions. It adheres to the formal definition where a single-column argument yields unique scalar values, while a multi-column table expression returns unique row combinations derived from the Cartesian product of specified attributes. This mechanism serves as a fundamental rule in relational algebra and data warehousing for eliminating duplicate records during aggregation prior to set operations like UNION.
Power BI DAX DISTINCT function to remove duplicates from column or table expressions
The distinct function operates within data transformation theory to enforce set uniqueness by filtering result sets based on column values or table expressions. It adheres to the formal definition wh…