text: -- Create a table of students
  CREATE TABLE students (
    id SERIAL PRIMARY KEY,
    last_name VARCHAR NOT NULL,
    first_name VARCHAR NOT NULL
  );
  
  -- Create a table of courses
  CREATE TABLE courses (
    id INTEGER NOT NULL PRIMARY KEY,
    course_name VARCHAR NOT NULL
  );
  
  -- Create a junction table.
  CREATE TABLE student_courses_junction (
    student_id INTEGER NOT NULL,
    FOREIGN KEY (student_id) REFERENCES students(id),
    course_id INTEGER NOT NULL,
    FOREIGN KEY (course_id) REFERENCES courses(id),
    course_term VARCHAR NOT NULL,
    PRIMARY KEY (student_id, course_id)
  );
  
  -- Insert Data into table
  INSERT INTO students (id, last_name, first_name)
  VALUES
    (1, 'Skywalker', 'Luke'),
    (2, 'Skywalker', 'Leia'),
    (3, 'Solo', 'Han');
  
  INSERT INTO courses (id, course_name)
  VALUES
    (3201, 'Data modeling'),
    (3202, 'Data visualization'),
    (12101, 'Force utilization');
  
  INSERT INTO student_courses_junction (student_id, course_id, course_term)
  VALUES
    (1,12101, 'Spring'),
    (1,3201, 'Fall'),
    (1,3202, 'Fall'),
    (2,12101, 'Fall'),
    (2,3202, 'Spring'),
    (3,3201, 'Spring'),
    (3,3202, 'Fall');
  