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35 lines
836 B
35 lines
836 B
7 months ago
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-- Курсы
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CREATE TABLE courses (
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course_id SERIAL PRIMARY KEY,
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course_name VARCHAR(255) NOT NULL,
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description TEXT,
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start_date DATE,
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end_date DATE
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);
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-- Студенты
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CREATE TABLE students (
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student_id SERIAL PRIMARY KEY,
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first_name VARCHAR(255) NOT NULL,
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last_name VARCHAR(255) NOT NULL,
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email VARCHAR(255) UNIQUE NOT NULL,
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date_of_birth DATE
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);
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-- Уроки
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CREATE TABLE lessons (
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lesson_id SERIAL PRIMARY KEY,
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lesson_name VARCHAR(255) NOT NULL,
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content TEXT,
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video_url VARCHAR(255),
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lesson_order INT
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);
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-- m2m students to courses
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CREATE TABLE student_courses (
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student_id INT REFERENCES students(student_id),
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course_id INT REFERENCES courses(course_id),
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enrollment_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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PRIMARY KEY (student_id, course_id)
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);
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