---

-- Проверка добавленного курса
SELECT * FROM courses WHERE title = 'Введение в Data Science';

-- Проверка добавленных записей
SELECT 
    s.full_name AS student_name,
    c.title AS course_title,
    e.enroll_date
FROM enrollments e
JOIN students s ON e.student_id = s.id
JOIN courses c ON e.course_id = c.id
WHERE c.title = 'Введение в Data Science';