I have 2 years worth of data . I want to do an efficiency index with following formulae :
Highest impressions in Any Week in 2 years / Impressions this( selected ) week .
The Approach I thought could work was that I will need to calculate Impressions PER week for all Dates using Calculated Measure .
I have tried with
_SUMWeeklyImpressions = CALCULATE(
ALLEXCEPT(‘Date’,‘Date’[FW Week Year])
However, ALL Except is not working .
Date table is linked with the other table .
I have attached file for reference here .
Data-Problem.pbix (1.1 MB)