fix mistakes with cohort analysis

dmedvedev/11.4 Pet project Cohort_analysis.sql

@@ -1,12 +1,14 @@
-CREATE MATERIALIZED VIEW user_cohort_analysis AS
+CREATE MATERIALIZED
+VIEW user_cohort_analysis AS
 
-	SELECT 
+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,	
+	ROUND(AVG((SELECT COUNT(pe.id)
+	FROM pet_enrollments pe)) / 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
@@ -23,7 +25,7 @@ CREATE MATERIALIZED VIEW user_cohort_analysis AS
 	WHERE DATE_TRUNC('month', pu2.registration_date) = pu.cohort_month
 		) AS avg_time_to_first_view
 
-	FROM (
+FROM (
 		SELECT
 		*,
 		DATE_TRUNC('month', registration_date) AS cohort_month
@@ -32,7 +34,7 @@ CREATE MATERIALIZED VIEW user_cohort_analysis AS
 	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
+GROUP BY pu.cohort_month
-	ORDER BY pu.cohort_month;
+ORDER BY pu.cohort_month;