course_summary materialized view

2026-01-05 22:56:56 +07:00
parent 45a59582e0
commit 23bb973ab0
1 changed files with 16 additions and 0 deletions
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+create materialized view dm_course_summary as
+select
+	e.course_id,
+	c.title,
+	count(distinct e.user_id) as unique_users,
+	count(distinct l.id) as lessons_count,
+	count(distinct lv.id) as total_views,
+	count(distinct lv.id)*1.0/count(distinct e.user_id) as avg_views_per_user,
+	min(lv.viewed_at) as first_viewed_at,
+	max(lv.viewed_at) as last_viewed_at
+from enrollments e
+join courses c on e.course_id = c.id
+join lessons l on  c.id = l.course_id
+join lessons_views lv on lv.lesson_id = l.id
+group by e.course_id, c.title
+order by e.course_id