title: SQLite avoiding duplicate entries in android
body: <p>I am working on a project to get appointment and in the appointment project client get appointment of doctor. </p>
  
  <p>In case date is <code>03/04/2014</code> and time is <code>04:00 pm</code>  and other client get appointment and if he insert date <code>03/04/2014</code> and time is <code>04:00 pm</code>  at that time how to avoid this record to insert into database ?</p>