text: CREATE TABLE employees (
      employee_id INT (11) AUTO_INCREMENT PRIMARY KEY,
      first_name VARCHAR (20) DEFAULT NULL,
      last_name VARCHAR (25) NOT NULL,
      email VARCHAR (100) NOT NULL,
      phone_number VARCHAR (20) DEFAULT NULL,
      hire_date DATE NOT NULL,
      job_id INT (11) NOT NULL,
      salary DECIMAL (8, 2) NOT NULL,
      manager_id INT (11) DEFAULT NULL,
      department_id INT (11) DEFAULT NULL,
      FOREIGN KEY (job_id) REFERENCES jobs (job_id),
      FOREIGN KEY (department_id) REFERENCES departments (department_id),
      FOREIGN KEY (manager_id) REFERENCES employees (employee_id)
  );
   
  CREATE TABLE dependents (
      dependent_id INT (11) AUTO_INCREMENT PRIMARY KEY,
      first_name VARCHAR (50) NOT NULL,
      last_name VARCHAR (50) NOT NULL,
      relationship VARCHAR (25) NOT NULL,
      employee_id INT (11) NOT NULL,
      FOREIGN KEY (employee_id) REFERENCES employees (employee_id)
  );