title: Distinct mobile count is not work in crudRepository in spring application
body: <p>I want to make a query like:</p>
  
  <pre><code>SELECT count(DISTINCT mobile) 
  FROM qa_account.customer_contact 
  WHERE customer_id=10001;
  </code></pre>
  
  <p>in crudRepository but getting a total count that includes duplicate too.
  I don't want to write a native query.</p>
  
  <p>Please give me some way to achieve my requirement.</p>