fixed code pet project Activity users

dmedvedev/11.1 Pet project Activity users.sql

@@ -1,6 +1,6 @@
 --Активность пользователей
 
-CREATE MATERIALIZED VIEW user_activity_summary AS
+--CREATE MATERIALIZED VIEW user_activity_summary AS
 
 --CTE кол-во курсов на которые записан пользователь
 WITH enrollment_count AS (
@@ -42,6 +42,18 @@ first_view AS (
 			ORDER BY plv.viewed_at 
 		) AS first_view
 	FROM pet_lesson_views plv
+),
+
+--CTE кол-во курсов доступных пользователю
+lesson_user_all_open AS (
+	SELECT 
+		pe.user_id,
+		pe.course_id,
+		COUNT(*) AS lesson_user_all_open
+	FROM pet_enrollments pe
+	LEFT JOIN pet_lessons pl ON pl.course_id = pe.course_id
+	GROUP BY pe.user_id, pe.course_id
+	ORDER BY user_id, course_id
 )
 
 SELECT 
@@ -51,13 +63,20 @@ SELECT
 	MAX(vlc.viewed_lessons_count) AS viewed_lessons_count,
 	last_view,
 	first_view,
-	ROUND(MAX(vlc.viewed_lessons_count * 100.0 / (SELECT COUNT(*) FROM pet_lessons pl)), 2) || '%' AS engagement_rate
+	ROUND(MAX(vlc.viewed_lessons_count) * 100.0 / lesson_user_all.lesson_user_all_open2, 2) || '%' AS engagement_rate
 	
 FROM pet_users pu 
 LEFT JOIN enrollment_count ec ON pu.id = ec.user_id
 LEFT JOIN viewed_lessons_count vlc ON pu.id = vlc.user_id 
 LEFT JOIN last_view lv ON pu.id = lv.user_id
 LEFT JOIN first_view fv ON pu.id = fv.user_id
+LEFT JOIN (
+	SELECT 
+		user_id, 
+		SUM(luao.lesson_user_all_open) AS lesson_user_all_open2
+	FROM lesson_user_all_open luao
+	GROUP BY user_id
+) AS lesson_user_all ON lesson_user_all.user_id = pu.id
 
-GROUP BY pu.id, ec.enrollment_count, last_view, first_view
+GROUP BY pu.id, ec.enrollment_count, last_view, first_view, lesson_user_all.lesson_user_all_open2
 ORDER BY pu.id;