Difficulty: Easy
Correct Answer: Correct
Explanation:
Introduction / Context: Databases hold many forms of data. “Event data” records discrete occurrences (for example, a purchase) with timestamps. “Status data” captures the current state (for example, account balance) or a snapshot. The question asks whether both can be stored in a database; the answer hinges on common modeling patterns rather than any platform limitation.
Given Data / Assumptions:
Concept / Approach: Event tables typically store one row per occurrence with a timestamp (and possibly an event type). Status can be modeled as the latest row in a history table, a separate current-state table maintained by upserts, or periodic snapshots. Many analytic architectures keep both: events for causality and sequence, status for quick point-in-time queries.
Step-by-Step Solution:
Define entities and business events (orders placed, shipped, returned).Create event fact tables (grain = one event) with timestamps and foreign keys.Model status as current-state tables or periodic snapshots, depending on needs.Use views or semantics to align events with derived status when necessary.Verification / Alternative check: Warehousing textbooks show event-centric facts plus status snapshots (for example, monthly inventory snapshots) in the same database, confirming feasibility.
Why Other Options Are Wrong:
Common Pitfalls: Confusing current-state overwrites with loss of history; mismatched grains between events and status leading to inaccurate joins; missing effective-dating for status changes.
Final Answer: Correct
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