Ref Website :
https://powerbidocs.com/power-bi-dax-functions/
ALL
Removes all filters from the specified table or column(s), regardless of whether they are from slicers, visuals, or other filtering methods. It essentially ignores all the context for the specified field(s) or table, providing an unfiltered view.
- Behavior: This will calculate the total sales across all products, ignoring any filters on the product column, such as those from slicers or visuals.
ALLEXCEPT
Removes all filters from a table except those on specific columns. This is useful when you want to clear all filters except for certain key columns, ensuring those filters remain in place.
- Behavior: This will calculate total sales while ignoring all filters except those applied to the Region column. So, any filters on other columns (like Product or Date) will be removed.
ALLSELECTED
Removes only the filters applied within the current visual (internal filters), but keeps slicer filters and other external filters intact. This is useful when you want to respect slicer or page-level filters but ignore the visual’s internal filtering.
Behavior: If the user selects certain regions or products using slicers, ALLSELECTED will respect those selections, but it will remove any filters imposed by the visual itself (like filters within a chart or table).
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