Table Relationship
Learn why combining tables with a join can inflate your totals, and how a relationship aggregates each table first to avoid the duplication.
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Published Dashboard
Learn what publishing a dashboard exposes beyond the chart, how Tableau Public makes published content public, and which checks belong before the upload.
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Dimension and Measure
Learn how BI tools split fields into what you analyze and how much of it, why the split is assigned automatically, and what breaks when it is wrong.
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Data Connection and Extract
Learn the difference between a live connection and a saved extract, what each costs you in freshness or speed, and when a snapshot misleads.