Design the following database schema containing three tables:

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• department:

  • id - INT PRIMARY KEY
  • name - VARCHAR(30) to hold department name

• role:

  • id - INT PRIMARY KEY
  • title - VARCHAR(30) to hold role title
  • salary - DECIMAL to hold role salary
  • department_id - INT to hold reference to department role belongs to

• employee:

  • id - INT PRIMARY KEY
  • first_name - VARCHAR(30) to hold employee first name
  • last_name - VARCHAR(30) to hold employee last name
  • role_id - INT to hold reference to role employee has
  • manager_id - INT to hold reference to another employee that manager of the current employee. This field may be null if the employee has no manager

Command-line application that allows you to:

• Add departments, roles, employees

• View departments, roles, employees

• Update employee roles

• Update employee managers

• View employees by manager

• Delete departments, roles, and employees

• View the total utilized budget of a department -- ie the combined salaries of all employees in that department

NPM packages:

• MySQL NPM package to connect to your MySQL database and perform queries.

• InquirerJs NPM package to interact with the user via the command-line.

• console.table to print MySQL rows to the console. There is a built-in version of console.table, but the NPM package formats the data a little better for our purposes.