Anton
39 lines
1.1 KiB
SQL
39 lines
1.1 KiB
SQL
DROP MATERIALIZED VIEW IF EXISTS dm.course_completion_rate;
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CREATE MATERIALIZED VIEW dm.course_completion_rate
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DISTRIBUTED BY (user_id)
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AS
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with activity_users as (
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select
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e.user_id as user_id,
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e.course_id as course_id,
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COUNT(DISTINCT flv.viewed_at) as lessons_viewed
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from
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core.enrollments e
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left join core.dim_lesson dl on e.course_id = dl.course_id
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left join core.fact_lesson_views flv on e.user_id = flv.user_id and e.course_id = flv.course_id and dl.lesson_id = flv.lesson_id
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group by
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e.user_id,
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e.course_id),
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course2 as (
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select
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course_id,
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COUNT(*) as lessons_in_course
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from core.dim_lesson
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group by
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course_id)
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select
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au.user_id as user_id,
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du.name as user_name,
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au.course_id as course_id,
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dc.title as course_title,
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c2.lessons_in_course as lessons_in_course,
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au.lessons_viewed as lessons_viewed,
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ROUND(au.lessons_viewed * 1.0 / c2.lessons_in_course , 2) as completion_rate
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from
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activity_users au
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left join core.dim_user du on au.user_id = du.user_id
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left join core.dim_course dc on au.course_id = dc.course_id
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left join course2 c2 on au.course_id = c2.course_id
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order by
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au.user_id,
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au.course_id; |