Dmitry Medvedev
20 lines
660 B
SQL
20 lines
660 B
SQL
CREATE MATERIALIZED VIEW platform_summary AS
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WITH stats AS (
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SELECT
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(SELECT COUNT(*) total_users FROM pet_users pu) AS total_users,
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(SELECT COUNT(*) total_courses FROM pet_courses pc) AS total_courses,
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(SELECT COUNT(*) total_lessons FROM pet_lessons pl) AS total_lessons,
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(SELECT COUNT(DISTINCT user_id) FROM pet_lesson_views plv) AS users_with_views,
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(SELECT COUNT(*) FROM pet_lesson_views plv) AS total_views
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)
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SELECT
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total_users,
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total_courses,
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total_lessons,
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users_with_views,
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ROUND((total_lessons * 1.0 / total_courses), 2) AS avg_lessons_per_course,
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ROUND((total_views * 1.0 / total_lessons), 2) AS avg_views_per_lesson
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FROM stats; |