test clickhouse code

2025-11-25 22:58:04 +06:00
parent 29d15db15f
commit 797a5b1969
1 changed files with 21 additions and 0 deletions
@@ -0,0 +1,21 @@
+CREATE MATERIALIZED VIEW lesson_popularity_summary
+ENGINE = SummingMergeTree()
+ORDER BY (course_id, lesson_id) AS
+SELECT 
+    lv.lesson_id as lesson_id,
+    l.title as lesson_title,
+    lv.course_id as course_id,
+    c.title as course_title,
+    count() as total_views,
+    uniq(lv.user_id) as unique_users,
+    min(lv.viewed_at) as first_view,
+    max(lv.viewed_at) as last_view
+FROM fact_lesson_views lv
+LEFT JOIN dim_lesson l ON lv.lesson_id = l.lesson_id
+LEFT JOIN dim_course c ON lv.course_id = c.course_id
+GROUP BY 
+    lv.lesson_id,
+    l.title,
+    lv.course_id,
+    c.title;
+SELECT * FROM lesson_popularity_summary;