diff --git a/mdrozdov/postgresql/dm_platform_summary.sql b/mdrozdov/postgresql/dm_platform_summary.sql
new file mode 100644
index 0000000..7be6f5c
--- /dev/null
+++ b/mdrozdov/postgresql/dm_platform_summary.sql
@@ -0,0 +1,8 @@
+create materialized view dm_platform_summary as
+select 
+	(select count(id) from users) as total_users,
+	(select count(id) from courses) as total_courses,
+	(select count(id) from lessons) as total_lessons,
+	(select count(distinct user_id) from lessons_views) as users_with_views,
+	round((select count(id) from lessons)*1.0/(select count(id) from courses), 2) as avg_lessons_per_course,
+	(select count(id) from lessons_views)*1.0/(select count(id) from lessons)
\ No newline at end of file