Engagement rate por landing page orgánica

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-- Engagement rate por landing page orgánica
-- Una sesión se considera engaged si session_engaged = '1'
WITH sesiones AS (
  SELECT
    (SELECT value.string_value FROM UNNEST(event_params)
      WHERE key = 'page_location') AS landing_page,
    CONCAT(
      user_pseudo_id, '.',
      CAST(
        (SELECT value.int_value FROM UNNEST(event_params) WHERE key = 'ga_session_id')
      AS STRING)
    ) AS session_id,
    MAX(
      (SELECT value.string_value FROM UNNEST(event_params)
        WHERE key = 'session_engaged')
    ) AS session_engaged
  FROM
    `your-project.analytics_XXXXXXXXX.events_*`
  WHERE
    _TABLE_SUFFIX BETWEEN FORMAT_DATE('%Y%m%d', DATE_SUB(CURRENT_DATE(), INTERVAL 30 DAY))
      AND FORMAT_DATE('%Y%m%d', CURRENT_DATE())
    AND traffic_source.medium = 'organic'
    AND event_name = 'session_start'
  GROUP BY
    landing_page, session_id
)
SELECT
  landing_page,
  COUNT(*) AS sesiones_totales,
  COUNTIF(session_engaged = '1') AS sesiones_engaged,
  ROUND(COUNTIF(session_engaged = '1') / COUNT(*) * 100, 2) AS engagement_rate
FROM
  sesiones
GROUP BY
  landing_page
HAVING
  sesiones_totales >= 10
ORDER BY
  engagement_rate ASC
LIMIT 50