Great article and well written. As a leader of our data analytics team, I am well versed in SQL and T-SQL and not DAX. This series will go along way in helping me understand how Power B/I works with data. When my team comes to me with questions, my context (SQL) is always different than theirs (DAX) and they have to interpret from my bias/experience into DAX - and not always successfully. Now I will have a better understanding of their context and can direct my input in more constructive ways. I am looking forward to the rest of the series!