title: How to alter a table using mongodb
body: <p>I need to add a new field for 'status' on MongoDB collection. I got so many tutorials but it never point-out the type of field. I need an varchar(5)</p>
  
  <p>Is the below snippet is right for my requirement.</p>
  
  <pre><code>db.users.update(
      { },
      { $set: { Status: []} },
      { multi: true }
  )
  </code></pre>