text: INSERT INTO departments (dept_name)
  VALUES ("CLOTHING"), ("COFFEE"), ("MUSIC"), ("BOOKS"), ("SALES");
  
  INSERT INTO roles (role, department, salary)
  VALUES ("STYLIST", 1, 550000), -- role 1
         ("BARISTA", 2, 320000), -- role 2
         ("DJ", 3, 210000), -- role 3
         ("ARCHIVIST", 3, 450000), -- role 4
         ("LIBRARIAN", 4, 500000), -- role 5
         ("CASHIER", 5, 330000); -- role 6
  
  INSERT INTO employees (first_name, last_name, role, supervisor)
  VALUES ("BINDI", "ASCLEPIAS", 1, 2), -- EMPLOYEE 1 bindi's supervisor: riot.
         ("RIOT", "ACHILLEA", 2, NULL), -- EMPLOYEE 2
         ("MAYA", "RUDBEKIA", 3, NULL), -- EMPLOYEE 3
         ("TATI", "PAPAVER", 4, 5), -- EMPLOYEE 4 tati's supervisor: alej.
         ("ALEJ", "CICHORIUM", 5, NULL), -- EMPLOYEE 5
         ("STAR", "LOBULARIA", 6, 3); -- EMPLOYEE 6 star's supervisor: maya.