test clickhouse code

2025-11-25 22:58:04 +06:00
parent 29d15db15f
commit 797a5b1969
1 changed files with 21 additions and 0 deletions
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 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;