Nick Edwards wants to perform a lag on data in Power Query:
I’m sure you’ve all heard of windowing functions in SQL Server? But what if you need to replicate these windowing functions in Power Query?
Here I have a sample CarSales.csv dataset of car sales per brand, per year, per month and the number of units sold. I will use this dataset to demonstrate how we can replicate the windowing LAG function in Power Query.
Click through to see the process.