title: Query mongo document to return all rows in a field
body: <p>For example, if I have a <code>name</code> field in mongo document <code>person</code>. In SQL, the query would be like <code>select name from person;</code> to return all names.
  What is the equivalent in mongo?</p>
  
  <p>I was thinking <code>db.person.find(&lt;&lt;What do I fill here&gt;&gt;, {name: 1});</code></p>
  
  <p>I was trying to retrieve all names while using mongo console.</p>