clickhouse-migrate-test-support-0.1.0.0: test/fixtures/kansoku/steps/0006_rollups_v2/statement-13.sql
-- Backfill from the (already deduplicated-by-merges) raw table.
INSERT INTO analytics.daily_event_counts (day, event_name, events)
SELECT
toDate(occurred_at) AS day,
event_name AS event_name,
countState() AS events
FROM analytics.events_raw
GROUP BY day, event_name;