Useful Power BI functions for data analysts:

1. CALCULATE: Changes the filter context for calculations, making dynamic measures easy.
2. SUMX: Performs row-by-row calculations, perfect for things like multiplying quantity and price before summing.
3. FILTER: Creates a filtered table based on conditions, great for custom data slices.
4. RELATED: Pulls values from related tables, handy for cross-table analysis.
5. DATEADD: Shifts dates for time-based comparisons (like year-over-year analysis).
6. RANKX: Ranks items, super useful for leaderboards or top-N analysis.
7. ALL: Ignores filters to show totals or unfiltered values.
8. SWITCH: Like a nested IF, but cleaner for multiple conditions.
9. DIVIDE: Safely divides numbers, avoiding errors from dividing by zero.
10. FIRSTNONBLANK / LASTNONBLANK: Finds the first or last non-empty value in a column.

Mastering these DAX functions will make your Power BI dashboards way more insightful and dynamic!

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