Which BigQuery queries burn the most slot time?

-- Top queries by slot consumption, last 30 days.
SELECT
  job_id,
  user_email,
  DATE(creation_time)                                        AS run_date,
  ROUND(total_slot_ms / 1000 / 3600, 2)                      AS slot_hours,
  total_bytes_billed,
  TIMESTAMP_DIFF(end_time, start_time, SECOND)               AS runtime_seconds,
  SAFE_DIVIDE(total_slot_ms, TIMESTAMP_DIFF(end_time, start_time, MILLISECOND))
                                                             AS avg_concurrent_slots,
  reservation_id,
  SUBSTR(REGEXP_REPLACE(query, r'\s+', ' '), 0, 300)         AS query_preview
FROM `region-us`.INFORMATION_SCHEMA.JOBS_BY_PROJECT
WHERE creation_time >= TIMESTAMP_SUB(CURRENT_TIMESTAMP(), INTERVAL 30 DAY)
  AND job_type = 'QUERY'
  AND state = 'DONE'
  AND total_slot_ms IS NOT NULL
ORDER BY total_slot_ms DESC
LIMIT 50;