As a follow-up to my prior blog post, I wanted to explore an additional use case for aggregation in Tableau: joining together data that might be at different date levels. It’s the same premise—you have two data sources at two levels of detail (e.g. row-level...
Since I have started using Tableau Prep, I can’t overstate how helpful it has been for cleaning, shaping and exploring my data before I start visualizing it in Tableau Desktop. However, one concept eluded me at first, and that was the Aggregate step. Why add...
Every single day, I get emails from former students asking for help with everything from visual best practices to calculated fields. Sometimes the questions are quick while others require more thought. Some may be deceptively simple questions that turn into something more complicated than first thought. What...
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