title: whats the best way to handle multiple database calls in nodejs
body: <p>I have a node app hitting postgres, in one of my functions I will need to be able to query many tables to get data to assemble for my json to send back. What is the best way to do this given the nature of nodejs, and I would like to avoid multiple levels of nested callbacks? I have been hunting around, but just am not grokking this concept well.</p>