Anton
64 lines
2.0 KiB
SQL
64 lines
2.0 KiB
SQL
-- 0. Создаём БД
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CREATE DATABASE dwh_db
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WITH OWNER = tester
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TEMPLATE = template0
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ENCODING = 'UTF8';
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-- 1. Создём схемы
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CREATE SCHEMA raw; -- сырые данные
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CREATE SCHEMA core; -- или core. Тут хранилище: факты и измерения
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CREATE SCHEMA dm; -- BI-витрины
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-- 2. Создаём raw-таблицы:
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CREATE TABLE raw.users (
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id serial4 NOT NULL,
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"name" varchar(100) NOT NULL,
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age int4 NOT NULL,
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email varchar(100) NOT NULL,
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registration_date date NOT NULL,
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CONSTRAINT users_pkey PRIMARY KEY (id)
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)
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DISTRIBUTED BY (id);
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CREATE TABLE raw.courses (
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id serial4 NOT NULL,
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title varchar(100) NOT NULL,
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category varchar(100) NOT NULL,
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created_at date NOT NULL,
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CONSTRAINT courses_pkey PRIMARY KEY (id)
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)
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DISTRIBUTED BY (id);
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CREATE TABLE raw.lessons (
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id serial4 NOT NULL,
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course_id int4 NOT NULL,
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title varchar(100) NOT NULL,
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duration_min int4 NOT NULL,
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CONSTRAINT lessons_pkey PRIMARY KEY (id)
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)
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DISTRIBUTED BY (id);
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ALTER TABLE raw.lessons ADD CONSTRAINT lessons_course_id_fkey FOREIGN KEY (course_id) REFERENCES raw.courses(id);
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CREATE TABLE raw.enrollments (
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id serial4 NOT NULL,
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user_id int4 NOT NULL,
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course_id int4 NOT NULL,
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enrolled_at date NOT NULL,
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CONSTRAINT enrollments_pkey PRIMARY KEY (id)
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)
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DISTRIBUTED BY (id);
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ALTER TABLE raw.enrollments ADD CONSTRAINT enrollments_course_id_fkey FOREIGN KEY (course_id) REFERENCES raw.courses(id);
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ALTER TABLE raw.enrollments ADD CONSTRAINT enrollments_user_id_fkey FOREIGN KEY (user_id) REFERENCES raw.users(id);
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CREATE TABLE raw.lesson_views (
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id serial4 NOT NULL,
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user_id int4 NOT NULL,
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lesson_id int4 NOT NULL,
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viewed_at timestamp NOT NULL,
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CONSTRAINT lesson_views_pkey PRIMARY KEY (id)
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)
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DISTRIBUTED BY (id);
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ALTER TABLE raw.lesson_views ADD CONSTRAINT lesson_views_lesson_id_fkey FOREIGN KEY (lesson_id) REFERENCES raw.lessons(id);
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ALTER TABLE raw.lesson_views ADD CONSTRAINT lesson_views_user_id_fkey FOREIGN KEY (user_id) REFERENCES raw.users(id); |