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Each answer links to the page that covers the topic in full.
As many as your pricing package allows, and this allowance is separate from your limit on other attribute types. To create more than your package permits, contact your Customer Success Manager. See Calculated Attributes: Guardrails & Limits.
In Audiences as segmentation criteria, in Journeys, to filter users and events from a real-time streaming source, and through the Profile API. See How Calculated Attributes Work and Calculated Attributes: Use Cases.
Calculated attribute values are not currently shown per-user in the CDP UI. Build a small test audience with a rule on the attribute and validate the count matches your expectation, or contact your Zeotap representative to verify specific values. See Guardrails & Limits: validation and visibility.
Batch attributes in the active state refresh daily, and paused attributes are not refreshed. Real-time attributes update as events arrive. See Guardrails & Limits: refresh and freshness.
Usually 24 to 36 hours, and around 72 hours in the worst case, because ingestion and the attribute refresh are two separate delays. See Guardrails & Limits: refresh and freshness.
When you select over the last as the run computation, batch attributes support up to 540 days or 18 months. Real-time attributes support up to one month, expressed as 30 days or 4 weeks, and up to 24 hours where the window is hourly. Selecting over entire data computes across all of your data with no window limit. See Guardrails & Limits.
{{VERIFY WITH PM: confirm users with no qualifying events hold no value rather than 0, and state the correct way to target them}} See Guardrails & Limits: users with no qualifying events.
{{VERIFY WITH PM: whether editing recomputes history or applies going forward only, and what happens to audiences or journeys using an attribute that is deleted}} See Guardrails & Limits: editing, pausing, and deleting.
Check the Status and Last Successful Refresh columns on the Calculated Attributes screen. See Components of the Calculated Attributes Screen and Calculated Attributes: Guardrails & Limits.
Last modified on August 14, 2026