<t>Until the implementation of the "count" keyword, you should do your query in a store procedure on the server. Take care to not get all columns/properties in your query if you want only a count. <br/>
<br/>
Select only the id like;<br/>
<br/>
dc.CreateDocumentQuery(update.SelfLink, "SELECT c.id FROM c")<br/>
<br/>
```</t>
