You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
35 lines
836 B
35 lines
836 B
7 months ago
|
-- Курсы
|
||
|
CREATE TABLE courses (
|
||
|
course_id SERIAL PRIMARY KEY,
|
||
|
course_name VARCHAR(255) NOT NULL,
|
||
|
description TEXT,
|
||
|
start_date DATE,
|
||
|
end_date DATE
|
||
|
);
|
||
|
|
||
|
-- Студенты
|
||
|
CREATE TABLE students (
|
||
|
student_id SERIAL PRIMARY KEY,
|
||
|
first_name VARCHAR(255) NOT NULL,
|
||
|
last_name VARCHAR(255) NOT NULL,
|
||
|
email VARCHAR(255) UNIQUE NOT NULL,
|
||
|
date_of_birth DATE
|
||
|
);
|
||
|
|
||
|
-- Уроки
|
||
|
CREATE TABLE lessons (
|
||
|
lesson_id SERIAL PRIMARY KEY,
|
||
|
lesson_name VARCHAR(255) NOT NULL,
|
||
|
content TEXT,
|
||
|
video_url VARCHAR(255),
|
||
|
lesson_order INT
|
||
|
);
|
||
|
|
||
|
-- m2m students to courses
|
||
|
CREATE TABLE student_courses (
|
||
|
student_id INT REFERENCES students(student_id),
|
||
|
course_id INT REFERENCES courses(course_id),
|
||
|
enrollment_date TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
|
||
|
PRIMARY KEY (student_id, course_id)
|
||
|
);
|