: The specific subset of data being calculated (e.g., a specific year or region selected in a report).
: Occurs when a formula iterates row-by-row, such as in a calculated column. Measures vs. Columns : DAX Functions
is a specialized formula language used in Microsoft Power BI , Power Pivot, and Analysis Services to perform custom calculations. While it shares a similar syntax with Excel, DAX is uniquely designed to handle relational data and complex context transitions. Essential Core Concepts : The specific subset of data being calculated (e
: Calculated on the fly based on report filters; more CPU-efficient and generally recommended for most analytical needs. Key Function Categories DAX Functions