title: May I use bson.objectid.ObjectId as (primary key) id in sql?
body: <p>I am thinking if I don't use <code>auto id</code> as primary id in mysql but use other method to implement, may I replace <code>auto id</code> from <code>bson.objectid.ObjectId</code> in mysql?</p>
  
  <p>According to <code>ObjectId</code> description, it's composed of:</p>
  
  <ul>
  <li>a 4-byte value representing the seconds since the Unix epoch</li>
  <li>a 3-byte machine identifier</li>
  <li>a 2-byte process id</li>
  <li>a 3-byte counter, starting with a random value.</li>
  </ul>
  
  <p>It seems it can provide unique and not duplicate key. Is it a good idea?</p>