How can we reconstruct the latest customer state from an event log stream?
Partitioning customer events by customer_id extracts the latest snapshot state for each customer.
Event sourcing snapshotting, Change Data Capture (CDC) state reconstruction, customer 360 views.
SELECT *
FROM (
SELECT
*,
ROW_NUMBER() OVER (
PARTITION BY customer_id
ORDER BY updated_at DESC
) AS rn
FROM customer_events
) latest
WHERE rn = 1;Practice typing production-grade SQL code for Latest Customer State.