Anton
51 lines
1.2 KiB
SQL
51 lines
1.2 KiB
SQL
-- Измерение пользователей
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CREATE TABLE core.dim_user (
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user_id INT PRIMARY KEY,
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name TEXT,
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age INT,
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email TEXT,
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registration_date DATE
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)
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DISTRIBUTED BY (user_id);
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-- Измерение курсов
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CREATE TABLE core.dim_course (
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course_id INT PRIMARY KEY,
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title TEXT,
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category TEXT
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)
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DISTRIBUTED BY (course_id);
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-- Измерение уроков
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CREATE TABLE core.dim_lesson (
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lesson_id INT PRIMARY KEY,
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title TEXT,
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duration_min INT,
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course_id INT REFERENCES core.dim_course(course_id)
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)
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DISTRIBUTED BY (lesson_id);
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-- Опционально: измерение времени
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CREATE TABLE core.dim_date (
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date DATE PRIMARY KEY,
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year INT,
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month INT,
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day INT,
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weekday TEXT
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)
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DISTRIBUTED BY (date);
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CREATE TABLE core.fact_lesson_views (
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user_id INT REFERENCES core.dim_user(user_id),
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lesson_id INT REFERENCES core.dim_lesson(lesson_id),
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course_id INT REFERENCES core.dim_course(course_id),
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viewed_at TIMESTAMP
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)
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DISTRIBUTED BY (user_id);
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CREATE TABLE core.enrollments (
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user_id INT REFERENCES core.dim_user(user_id),
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course_id INT REFERENCES core.dim_course(course_id),
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enrolled_at TIMESTAMP
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)
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DISTRIBUTED BY (user_id); |