Скачать или смотреть 11. Who’s Been With Us the Longest? | Power BI DAX Challenge Series

Welcome to Day 11 of the 21-Day Power BI DAX Challenge by Pavan Lalwani!

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You'll create a virtual table, calculate the lifespan for each customer using DATEDIFF, and then find the customer with the longest relationship using LOOKUPVALUE.

🧠 What You’ll Learn:
1.How to calculate customer lifespan using DATEDIFF
2.Create virtual tables using ADDCOLUMNS
3.Find max duration with MAXX
4.Filter data using FILTER
5.Use LOOKUPVALUE to fetch customer names

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⏱️ Timestamps:
0:08 – Welcome to Day 11
0:14 – The challenge: who is our most loyal customer?
0:30 – Overview of customer data
0:51 – Goal: calculate lifespan (first to last order)
1:40 – Using DATEDIFF to get customer span
2:38 – Finding maximum span using MAXX
3:11 – Filtering to find the top customer
4:13 – Getting customer name using LOOKUPVALUE
5:12 – Result: Jeff Bezos is our top loyal customer
5:25 – Why customer loyalty matters in BI
5:50 – Sneak peek of Challenge Day 12

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