Description: ALLSELECTED is a function in DAX (Data Analysis Expressions) used in the context of data analysis in tools like Power BI and SQL Server Analysis Services. Its main feature is that it returns all values from a specific column, ignoring any filters that have been applied to the data in the current context. This allows analysts to gain a more comprehensive view of the data, as ALLSELECTED considers all items in the column, even those that are not visible due to filters. This function is particularly useful in situations where totals or averages need to reflect the complete dataset rather than just those that are filtered. Additionally, ALLSELECTED can be combined with other DAX functions to perform more complex calculations, making it a powerful tool for creating interactive reports and dashboards across various data analysis platforms. Proper use of this function can significantly enhance the quality of data analysis, enabling users to make more informed decisions based on a broader understanding of the available information.
Uses: ALLSELECTED is primarily used in creating measures in DAX to obtain results that reflect the complete dataset, even when filters are applied. It is common in the creation of reports and dashboards in data analysis tools, where there is a need to display aggregated data that is not affected by the filters applied in the report. It is also used to calculate percentages and ratios that require a complete dataset to be accurate, allowing analysts to make more meaningful comparisons between different data segments.
Examples: A practical example of ALLSELECTED is in a sales report where one wants to calculate the percentage of sales of a specific product relative to the total sales of all products, regardless of the filters applied by the user. The measure could be something like: ‘Sales Percentage = SUM(Sales[Amount]) / CALCULATE(SUM(Sales[Amount]), ALLSELECTED(Sales[Product]))’. This ensures that the denominator considers all sales, not just those visible in the current report context.
