dmezentsev
105 lines
2.9 KiB
SQL
105 lines
2.9 KiB
SQL
DROP MATERIALIZED VIEW IF EXISTS dmezentsev.conversion_funnel;
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CREATE MATERIALIZED VIEW dmezentsev.conversion_funnel AS
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WITH progress AS (
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-- Прогресс каждого пользователя по каждому курсу
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SELECT
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e.course_id,
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e.user_id,
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COUNT(DISTINCT l.id) AS total_lessons,
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COUNT(DISTINCT lv.lesson_id) AS viewed_lessons,
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ROUND(COUNT(DISTINCT lv.lesson_id) * 100.0 / NULLIF(COUNT(DISTINCT l.id), 0), 2) AS viewed_pct
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FROM dmezentsev.enrollments e
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LEFT JOIN dmezentsev.lessons l ON e.course_id = l.course_id
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LEFT JOIN dmezentsev.lesson_views lv ON l.id = lv.lesson_id AND e.user_id = lv.user_id
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GROUP BY e.course_id, e.user_id
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),
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funnel_stats AS (
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-- Статистика по каждому курсу для всех этапов воронки
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SELECT
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c.id AS course_id,
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c.title AS course_title,
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(SELECT COUNT(*) FROM dmezentsev.users_) AS registered_count,
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COUNT(DISTINCT e.user_id) AS enrolled_count,
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COUNT(DISTINCT CASE WHEN p.viewed_lessons > 0 THEN e.user_id END) AS started_count,
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COUNT(DISTINCT CASE WHEN p.viewed_pct >= 50 THEN e.user_id END) AS mid_progress_count,
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COUNT(DISTINCT CASE WHEN p.viewed_pct = 100 THEN e.user_id END) AS completed_count
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FROM dmezentsev.courses c
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LEFT JOIN dmezentsev.enrollments e ON c.id = e.course_id
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LEFT JOIN progress p ON e.course_id = p.course_id AND e.user_id = p.user_id
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GROUP BY c.id, c.title
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)
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-- Соединяем этапы с помощью UNION ALL
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SELECT
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course_id,
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course_title,
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stage_name,
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users_count,
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conversion_from_previous,
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conversion_from_start
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FROM (
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-- Этап 1: registered
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SELECT
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course_id,
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course_title,
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'registered' AS stage_name,
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registered_count AS users_count,
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0 AS conversion_from_previous,
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100.00 AS conversion_from_start,
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1 AS stage_order
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FROM funnel_stats
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UNION ALL
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-- Этап 2: enrolled
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SELECT
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course_id,
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course_title,
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'enrolled',
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enrolled_count,
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ROUND(100.0 * enrolled_count / NULLIF(registered_count, 0), 2),
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ROUND(100.0 * enrolled_count / NULLIF(registered_count, 0), 2),
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2 AS stage_order
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FROM funnel_stats
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UNION ALL
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-- Этап 3: started
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SELECT
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course_id,
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course_title,
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'started',
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started_count,
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ROUND(100.0 * started_count / NULLIF(enrolled_count, 0), 2),
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ROUND(100.0 * started_count / NULLIF(registered_count, 0), 2),
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3 AS stage_order
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FROM funnel_stats
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UNION ALL
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-- Этап 4: mid_progress
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SELECT
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course_id,
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course_title,
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'mid_progress',
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mid_progress_count,
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ROUND(100.0 * mid_progress_count / NULLIF(started_count, 0), 2),
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ROUND(100.0 * mid_progress_count / NULLIF(registered_count, 0), 2),
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4 AS stage_order
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FROM funnel_stats
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UNION ALL
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-- Этап 5: completed
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SELECT
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course_id,
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course_title,
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'completed',
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completed_count,
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ROUND(100.0 * completed_count / NULLIF(mid_progress_count, 0), 2),
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ROUND(100.0 * completed_count / NULLIF(registered_count, 0), 2),
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5 AS stage_order
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FROM funnel_stats
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) AS funnel_rows
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ORDER BY course_id, stage_order; |