title: DocumentDB Queries help/reference
body: <p>EDIT:
  I see downvote for this question, editing my question to add clarity and readability.</p>
  
  <p>I'm from SQL background ramping up on Document DB Query syntax.  I'm looking for document db equivalent syntax for the following T-SQL Queries. Any help appreciated.</p>
  
  <ol>
  <li><p>Select * from c where c.header.TimeStampField >= 'Time Stamp Constant'</p></li>
  <li><p>Select * from c where Upper(c.stringifield) = "lowercase to uppercase"</p></li>
  <li>select count(1) from c --Find count of all documents</li>
  </ol>
  
  <p>Is it possible to delete the documents thru a query ? like RDBMS queries (delete from table?)</p>