title: Mongo Query with distinct + Like
body: <p>Trying to get unique userNames for a specified time stamp (ts field) range.</p>
  
  <pre><code>db.auditLog.distinct( {"data.userName"}, {ts: /.*05/19/2016*./ )
  </code></pre>
  
  <p>from</p>
  
  <pre><code>_id: ObjectId("51d33bc8e4b09d71ea4c45d4")
  ts: 07/02/2013 04:44:56 PM (-0400)
  data:
      userName: "adminuser"
  </code></pre>
  
  <p>This ain't it but you probably know what I am trying to do.</p>
  
  <p>I would also like to use $gte and $lt if possible.</p>