Dmitry Medvedev
152 lines
4.2 KiB
SQL
152 lines
4.2 KiB
SQL
CREATE MATERIALIZED VIEW conversion_funnel AS
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-- CTE какое кол-во человек записалось на курс
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WITH
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enrolled_users AS (
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SELECT
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course_id,
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COUNT(*) AS enrolled
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FROM pet_enrollments pe
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GROUP BY course_id
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),
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-- СТЕ на начавших смотреть курс
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started_users AS (
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SELECT
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pc.id AS course_id,
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COUNT(DISTINCT plv.user_id) AS started
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FROM pet_courses pc
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LEFT JOIN pet_lessons pl
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ON pc.id = pl.course_id
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LEFT JOIN pet_lesson_views plv
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ON plv.lesson_id = pl.id
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GROUP BY pc.id
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),
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--СТЕ на кол-во просмотров курса и прогресс по курсу
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user_progress AS (
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SELECT
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pc.id AS course_id,
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plv.user_id,
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COUNT(DISTINCT lesson_id) AS count_views,
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count_lesson_in_course.count_lesson_in_course AS count_lesson_in_course,
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COUNT(DISTINCT lesson_id) * 1.0 / count_lesson_in_course AS progress
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FROM pet_courses pc
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LEFT JOIN pet_lessons pl
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ON pl.course_id = pc.id
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LEFT JOIN pet_lesson_views plv
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ON plv.lesson_id = pl.id
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LEFT JOIN (
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SELECT
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pl.course_id,
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COUNT(*) AS count_lesson_in_course
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FROM pet_lessons pl
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GROUP BY pl.course_id
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) AS count_lesson_in_course
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ON count_lesson_in_course.course_id = pc.id
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GROUP BY pc.id, plv.user_id, count_lesson_in_course
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),
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main_table AS (
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SELECT
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pc.id AS course_id,
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pc.title AS course_title,
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'registered' AS stage_name,
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0 AS stage_order,
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(SELECT COUNT(*) FROM pet_users pu) AS users_count,
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ROUND(100, 2) || '%' AS conversion_from_previous,
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ROUND(100, 2) || '%' AS conversion_from_start
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FROM pet_courses pc
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UNION ALL
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SELECT
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pc.id AS course_id,
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pc.title AS course_title,
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'enrolled' AS stage_name,
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1 AS stage_order,
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enrolled_users.enrolled,
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ROUND(enrolled_users.enrolled * 100.0 / (SELECT COUNT(*) FROM pet_users pu), 2) || '%' AS conversion_from_previous,
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ROUND(enrolled_users.enrolled * 100.0 / (SELECT COUNT(*) FROM pet_users pu), 2) || '%' AS conversion_from_start
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FROM pet_courses pc
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LEFT JOIN enrolled_users
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ON enrolled_users.course_id = pc.id
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UNION ALL
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SELECT
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pc.id AS course_id,
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pc.title AS course_title,
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'started' AS stage_name,
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2 AS stage_order,
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started_users.started,
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ROUND(started_users.started * 100.0 / enrolled_users.enrolled, 2) || '%' AS conversion_from_previous,
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ROUND(started_users.started * 100.0 / (SELECT COUNT(*) FROM pet_users pu), 2) || '%' AS conversion_from_start
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FROM pet_courses pc
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LEFT JOIN started_users
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ON started_users.course_id = pc.id
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LEFT JOIN enrolled_users
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ON enrolled_users.course_id = pc.id
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UNION ALL
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SELECT
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pc.id AS course_id,
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pc.title AS course_title,
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'mid_progress' AS stage_name,
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3 AS stage_order,
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( SELECT COUNT(*) FROM user_progress
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WHERE user_progress.course_id = pc.id AND user_progress.progress >= 0.5
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),
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ROUND(( SELECT COUNT(*) FROM user_progress
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WHERE user_progress.course_id = pc.id AND user_progress.progress >= 0.5) * 100.0 / started_users.started, 2) || '%' AS conversion_from_previous,
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ROUND(( SELECT COUNT(*) FROM user_progress
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WHERE user_progress.course_id = pc.id AND user_progress.progress >= 0.5) * 100.0 / (SELECT COUNT(*) FROM pet_users pu), 2) || '%' AS conversion_from_start
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FROM pet_courses pc
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LEFT JOIN started_users
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ON started_users.course_id = pc.id
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UNION ALL
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SELECT
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pc.id AS course_id,
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pc.title AS course_title,
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'completed' AS stage_name,
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4 AS stage_order,
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( SELECT COUNT(*) FROM user_progress
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WHERE user_progress.course_id = pc.id AND user_progress.progress >= 1),
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ROUND(( SELECT COUNT(*) FROM user_progress
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WHERE user_progress.course_id = pc.id AND user_progress.progress >= 1) * 100.0 /
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( SELECT COUNT(*) FROM user_progress
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WHERE user_progress.course_id = pc.id AND user_progress.progress >= 0.5), 2) || '%' AS conversion_from_previous,
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ROUND(( SELECT COUNT(*) FROM user_progress
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WHERE user_progress.course_id = pc.id AND user_progress.progress >= 1) * 100.0 /
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(SELECT COUNT(*) FROM pet_users pu), 2) || '%' AS conversion_from_start
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FROM pet_courses pc
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ORDER BY course_id, stage_order
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)
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-- main select
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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 main_table; |