Dmitry Medvedev
39 lines
1.1 KiB
SQL
39 lines
1.1 KiB
SQL
CREATE MATERIALIZED VIEW user_cohort_analysis AS
|
|
|
|
SELECT
|
|
TO_CHAR(pu.cohort_month, 'YYYY-MM') AS MONTH,
|
|
COUNT(DISTINCT pu.id) AS users_in_cohort,
|
|
COUNT(DISTINCT pe.user_id) AS enrolled_users,
|
|
COUNT(DISTINCT plv.user_id) AS active_users,
|
|
ROUND(COUNT(DISTINCT plv.user_id) * 100.0 / COUNT(DISTINCT pu.id), 2) || '%' AS retention_rate,
|
|
ROUND(AVG((SELECT COUNT(*) FROM pet_courses pc)) / COUNT(DISTINCT pu.id), 2) AS avg_courses_per_user,
|
|
(SELECT
|
|
ROUND(AVG(table_first_viewed_at.first_viewed_at::date - pu2.registration_date::date), 2)
|
|
FROM pet_users pu2
|
|
LEFT JOIN (
|
|
SELECT
|
|
plv2.user_id,
|
|
MIN(plv2.viewed_at) AS first_viewed_at
|
|
FROM pet_lesson_views plv2
|
|
GROUP BY plv2.user_id
|
|
) AS table_first_viewed_at
|
|
|
|
ON pu2.id = table_first_viewed_at.user_id
|
|
|
|
WHERE DATE_TRUNC('month', pu2.registration_date) = pu.cohort_month
|
|
) AS avg_time_to_first_view
|
|
|
|
FROM (
|
|
SELECT
|
|
*,
|
|
DATE_TRUNC('month', registration_date) AS cohort_month
|
|
FROM pet_users
|
|
) AS pu
|
|
LEFT JOIN pet_enrollments pe ON pu.id = pe.user_id
|
|
LEFT JOIN pet_lesson_views plv ON pu.id = plv.user_id
|
|
|
|
GROUP BY pu.cohort_month
|
|
ORDER BY pu.cohort_month;
|
|
|
|
|