What are Sets in Tableau?

A set is a custom, reusable field that defines a subset of data based on a condition or a manually chosen list of members — effectively a saved "in/out" grouping you can drop onto a view.

• Fixed sets are built from a manually selected list of specific members (e.g. these 5 named customers).
• Computed (dynamic) sets are built from a condition or a Top-N rule (e.g. "Top 10 Customers by Sales"), and automatically update as the underlying data changes.
• Sets can be dragged onto Color to highlight members vs non-members, used in a filter, or combined with other sets (union/intersection) to build more complex logic.

Right-click [Customer Name] -> Create -> Set
-> Top tab -> Top 10 by SUM(Sales)
-> produces a dynamic "Top 10 Customers" set

Because computed sets are rule-based rather than a fixed list, they're especially useful for things like "always show me this quarter's top performers," where the actual members should shift automatically as new data comes in.

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