added Mater VIEW for Pet project 'Cohort_analysis'

2026-06-21 22:21:26 +05:00
parent 94965703a3
commit 29cbd33b71
1 changed files with 38 additions and 0 deletions
@@ -0,0 +1,38 @@
 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;