PET project task 3 completed

2026-02-18 14:41:23 +03:00
parent 0c4ad4965d
commit 1fa2d88bf2
1 changed files with 18 additions and 0 deletions
@@ -272,4 +272,22 @@ create materialized view course_summary AS
 	order by course_id
 ;
 --------------------------------------------------------------------------------------------------
 -- 3 задание Общая отчетность по взаимодействию
 create materialized view platform_summary as  
 with total_counts as (
 					select COUNT(id) as total_users,
 					(select COUNT(id) from courses) as total_courses,
 					(select COUNT(id) from lessons) as total_lessons,
 					(select COUNT(id) from lesson_views) as total_views,
 					(select COUNT(distinct user_id) from lesson_views) as users_with_views
 					from users
 					)
 SELECT total_users, total_courses, total_lessons, users_with_views,
 ROUND(1.00 * total_lessons / total_courses, 2) as avg_lessons_per_course,
 ROUND(1.00 * total_views / total_lessons, 2) as avg_views_per_lesson
 from total_counts
 ;