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Data & Analytics · Advanced

Accumulating Snapshot Fact Table

A fact table with one row per process instance, such as an order, that is updated as the process passes milestones.

Definition

Accumulating snapshots have several date foreign keys (ordered, shipped, delivered) and lag measures between milestones. Unlike other fact tables, their rows are updated.

Example

An order row whose ShipDateKey and DeliveryDateKey are filled in as events occur.

Exam tip

Pipeline or workflow processes with defined milestones = accumulating snapshot.

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