text: 
  DROP DATABASE IF EXISTS our_workplace;
  CREATE DATABASE our_workplace;
  
  USE our_workplace;
  
  CREATE TABLE department (
    id INT NOT NULL AUTO_INCREMENT,
    name VARCHAR(30) NOT NULL,
    PRIMARY KEY (id)
  );
  
  CREATE TABLE role (
    id INT NOT NULL AUTO_INCREMENT,
    title VARCHAR(30) NOT NULL,
    salary DECIMAL NOT NULL,
    department_id INT NOT NULL,
    PRIMARY KEY (id)
  );
   
  CREATE TABLE employee (
    id INT NOT NULL AUTO_INCREMENT,
    first_name VARCHAR(30) NOT NULL,
    last_name VARCHAR(30) NOT NULL,
    role_id INT NOT NULL,
    manager_id INT,
    PRIMARY KEY (id)
  ); 
  
  
  