title: I need top row of same user RegistrationId Using SQL Query(I need SQL select query)
body: <p>I have a view and view name is my_view which have below example data and if RegistrationId will duplication means, select top of the row of the user details based on RegistrationId.</p>
  
  <p>My View details.</p>
  
  <pre>
  <strong>Email</strong>                  <strong>Qualification</strong>      <strong>RegistrationId</strong>
  master@gmail.com       MCA                    101
  master@gmail.com       BCA                    101
  testing@gmail.com      MBA                    102   
  </pre>
  
  <p>I need result should be.</p>
  
  <pre><strong>Email</strong>                  <strong>Qualification</strong>      <strong>RegistrationId</strong>
  master@gmail.com       MCA                    101
  testing@gmail.com      MBA                    102   
  </pre>