text: DROP DATABASE IF EXISTS trackerDB;
  CREATE DATABASE trackerDB;
  USE trackerDB;
  
  CREATE TABLE Department (
  	id INT(10) auto_increment NOT NULL,
      name VARCHAR(30),
      PRIMARY KEY (id)
  );
  
  CREATE TABLE Role (
      id INT(10) auto_increment NOT NULL,
      title VARCHAR(30),
      salary DECIMAL(12,2),
      department_id INT(10) NOT NULL,
      PRIMARY KEY (id) 
  );
  
  CREATE TABLE Employee (
      id INT(10) auto_increment NOT NULL,
      first_name VARCHAR(30),
      last_name VARCHAR(30),
      role_id INT(10) NOT NULL,
      manager_id INT(10),
      PRIMARY KEY (id)
  );
  