Aysat
21 lines
584 B
SQL
21 lines
584 B
SQL
CREATE MATERIALIZED VIEW lesson_popularity_summary
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ENGINE = SummingMergeTree()
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ORDER BY (course_id, lesson_id) AS
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SELECT
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lv.lesson_id as lesson_id,
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l.title as lesson_title,
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lv.course_id as course_id,
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c.title as course_title,
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count() as total_views,
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uniq(lv.user_id) as unique_users,
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min(lv.viewed_at) as first_view,
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max(lv.viewed_at) as last_view
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FROM fact_lesson_views lv
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LEFT JOIN dim_lesson l ON lv.lesson_id = l.lesson_id
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LEFT JOIN dim_course c ON lv.course_id = c.course_id
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GROUP BY
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lv.lesson_id,
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l.title,
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lv.course_id,
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c.title;
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