Dmitry Medvedev
39 lines
1.1 KiB
SQL
39 lines
1.1 KiB
SQL
CREATE MATERIALIZED
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VIEW user_cohort_analysis AS
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SELECT
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TO_CHAR(pu.cohort_month, 'YYYY-MM') AS month,
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COUNT(DISTINCT pu.id) AS users_in_cohort,
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COUNT(DISTINCT pe.user_id) AS enrolled_users,
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COUNT(DISTINCT plv.user_id) AS active_users,
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ROUND(COUNT(DISTINCT plv.user_id) * 100.0 / COUNT(DISTINCT pu.id), 2) || '%' AS retention_rate,
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ROUND(COUNT(DISTINCT pe.id) * 1.0 / COUNT(DISTINCT pu.id), 2) AS avg_courses_per_user,
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(
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SELECT
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ROUND(AVG(table_first_viewed_at.first_viewed_at::date - pu2.registration_date::date), 2)
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FROM pet_users pu2
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JOIN (
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SELECT
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plv2.user_id,
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MIN(plv2.viewed_at) AS first_viewed_at
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FROM pet_lesson_views plv2
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GROUP BY plv2.user_id
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) AS table_first_viewed_at ON pu2.id = table_first_viewed_at.user_id
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WHERE DATE_TRUNC('month', pu2.registration_date) = pu.cohort_month
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) AS avg_time_to_first_view
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FROM (
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SELECT
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*,
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DATE_TRUNC('month', registration_date) AS cohort_month
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FROM pet_users
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) AS pu
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LEFT JOIN pet_enrollments pe ON pu.id = pe.user_id
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LEFT JOIN pet_lesson_views plv ON pu.id = plv.user_id
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GROUP BY pu.cohort_month
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ORDER BY pu.cohort_month;
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