Power BI · Sales & Marketing

Advanced DAX Window Functions

Modern DAX: OFFSET, WINDOW, INDEX and RANK.

Power BIDAXWindow functions
Self-built project · realistic sample dataFictional organisation names · no client data shown

01Business problem

Older time-intelligence patterns were slow and hard to maintain; the goal was to show the cleaner modern alternatives.

02Approach

Month-over-month change uses OFFSET, running and moving totals use WINDOW, and top/bottom performers use INDEX and RANK, replacing nested CALCULATE/FILTER patterns.

03What's inside

  • MoM change with OFFSET
  • Running and 3-month moving totals with WINDOW
  • Top-N and bottom-N with INDEX / RANK
  • Side-by-side comparison with legacy patterns

04Insights & outcome

Faster measures that are easier to read and maintain.

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