create schema raw;
	create schema core;
	create schema dm;
	
	create table raw.users(
		id INT,
		name varchar(50),
		age INT,
		email varchar(50),
		registration_date date
	)
	distributed by (id);
	
	create table raw.courses (
		id INT,
		title text,
		category varchar(40),
		created_at date
	)
	distributed by (id);
	
	create table raw.lessons (
		id INT,
		course_id INT,
		title TEXT,
		duration_min INT
	)
	distributed by (course_id);
	
	create table raw.enrollments (
		id INT,
		user_id INT,
		course_id INT,
		enrolled_at date
	)
	distributed by (user_id);
	
	create table raw.lessons_views(
	    id int,
	    user_id int,
	    lesson_id int,
	    viewed_at timestamp
	)
	distributed by (user_id)