Pet 6th task completed

2026-02-23 15:02:11 +03:00
parent a109cadca2
commit 4d56aa1f5b
1 changed files with 94 additions and 1 deletions
@@ -353,7 +353,100 @@ ROUND(100.0 * unique_viewers / enrolled_to_course, 2) as completion_rate
 from lessons_in_courses lic
 join views_cte vc on lic.lesson_id = vc.lesson_id
 ;
-
+-----------------------------------------------------------------------------------------------
 -- 6 Задания Воронка Конверсии
 create materialized view conversion_funnel AS
 with course_lessons as (
 						select c.id as course_id, c.title as course_title,
 						COUNT(l.id) as total_lessons
 						from courses c
 						join lessons l on l.course_id = c.id
 						group by c.id, c.title
 						),
 registered_users as (
 					select COUNT(distinct id) as total_users
 					from users
 					),
 enrolled_users as (
 					select e.course_id, 
 					COUNT(distinct e.user_id) as enrolled_count
 					from enrollments e
 					group by e.course_id
 					),
 started_users as (
 				select l.course_id,
 				COUNT(distinct lv.user_id) as started_count
 				from lessons l
 				join lesson_views lv on l.id = lv.lesson_id
 				group by l.course_id
 				),
 user_progress as (				
 				select l.course_id, lv.user_id,
 				COUNT(distinct lv.lesson_id) as viewed_lessons
 				from lesson_views lv
 				join lessons l on lv.lesson_id = l.id
 				group by l.course_id, lv.user_id
 				),
 mid_progress_users as (
 					select up.course_id,
 					COUNT(distinct up.user_id) as mid_progress_count
 					from user_progress up
 					join course_lessons cl on up.course_id = cl.course_id
 					where up.viewed_lessons >= cl.total_lessons * 0.5
 					group by up.course_id
 					),
 completed_users as (
 					select up.course_id,
 					COUNT(distinct up.user_id) as completed_count
 					from user_progress up
 					join course_lessons cl on up.course_id = cl.course_id
 					where up.viewed_lessons >= cl.total_lessons
 					group by up.course_id
 					),
 funnel_stages as (
 				select cl.course_id, cl.course_title,
 				'registered' as stage_name,
 				ru.total_users as users_count,
 				1 as stage_order
 				from course_lessons cl
 				cross join registered_users ru
 						union all
 				select cl.course_id, cl.course_title,
 				'enrolled' as stage_name,
 				eu.enrolled_count as users_count,
 				2 as stage_order
 				from course_lessons cl
 				left join enrolled_users eu on cl.course_id = eu.course_id
 						union all
 				select cl.course_id, cl.course_title,
 				'started' as stage_name,
 				su.started_count as users_count,
 				3 as stage_order
 				from course_lessons cl
 				left join started_users su on cl.course_id = su.course_id
 						union all
 				select cl.course_id, cl.course_title,
 				'mid_progress' as stage_name,
 				coalesce(mpu.mid_progress_count, 0) as users_count,
 				4 as stage_order
 				from course_lessons cl
 				left join mid_progress_users mpu on cl.course_id = mpu.course_id
 						union all
 				select cl.course_id, cl.course_title,
 				'completed' as stage_name,
 				coalesce(cu.completed_count, 0) as users_count,
 				5 as stage_order
 				from course_lessons cl
 				left join completed_users cu on cl.course_id = cu.course_id
 				)
 	 select course_id, course_title, stage_name, users_count,
 	 ROUND(100.0 * users_count / NULLIF(LAG(users_count) over (partition by course_id order by stage_order), 0), 2) 
 	 as conversion_from_previous,
 	     ROUND(100.0 * users_count / NULLIF(FIRST_VALUE(users_count) over (partition by course_id order by stage_order), 0), 2) 
 	     as conversion_from_start
 	 from funnel_stages
 ;
 -- Признаюсь 6-е задание сделал с помощью нейросети, потому что сам вообще никак к нему подобраться не мог.