title: mongoexport, projection in query
body: <p>On MongoDb.exe I can do a query with projection only ONE a field like this:<br/></p>
  
  <blockquote>
    <p>db.cache_sta.find({ip:"10.5.8.17"},{_id:0, hostname:1})<br/>
        { "hostname" : "iPad-Blanka" }</p>
  </blockquote>
  
  <p>I try do the same but by mongoexport.exe</p>
  
  <pre><code>mongoexport.exe /h 127.0.0.1:27117 /d ace /c cache_sta /q {ip:\"10.5.8.17\"},{"_id":0,hostname:1}
  </code></pre>
  
  <p>results:</p>
  
  <pre><code>error validating settings: query '{ip:"10.5.8.17"},{_id:0,hostname:1}' is not valid JSON: invalid character ',' after top-level value
  </code></pre>