Row context is a fundamental evaluation mechanism in DAX that establishes a "current row" reference within iterative operations on table expressions or calculated columns. This concept operates under the rule that column references acquire semantic meaning only when bound to a specific row index provided by an iterator, such as `SUMX` or inherent scanning logic in calculated columns. Within the domain of data modeling and language definition systems, this mechanism serves as a prerequisite for defining non-aggregated scalar expressions, distinguishing itself from filter context by solely providing positional access rather than logical filtering constraints on query results.
Row context is a fundamental evaluation mechanism in DAX that establishes a "current row" reference within iterative operations on table expressions or calculated columns. This concept operates under…