title: how to communicate between nodejs and DB
body: <p>I want to know how to communicate between nodejs and database.
  I found the similar question and tried with 'db-mysql module; 
  but it doesn't work at window.
  it has a problem with install and I found that the problem will never get fixed.
  the problem is node-waf, and i found it'll never support at window. 
  Then how can I communicate with Database, with js file?
  If JS file Using Node.js, isn't it only works in the directory that nodejs is installed? And Isn't it only be a JS file? 
  How can i using the database and db query... such as mysql query.... and how to connect?? Plz help ME.. </p>