title: Implementation of having count with group by in java 8
body: <p>I am looking for an implementation of group by, having and then filter based on count in lambda expressions.</p>
  
  <pre><code>select COUNT(employee_id), department_id  from employee
  GROUP BY department_id
  HAVING COUNT(employee_id) &gt; 1
  </code></pre>
  
  <p>Is there any simple implementation of achieving this using lambda expressions.</p>