Power Query

Many Power BI issues do not start with poor visuals or weak calculations. They start much earlier, when logic is placed in the wrong layer. Reports become slow, models turn confusing, and small changes take longer than they should. The question of whether logic should live in Power Query or DAX is not technical trivia. It directly affects performance, clarity, and long-term usability.

This blog explains how to think about that decision in a practical way.