title: New on android programming - create a database If it doesn't exist
body: <p>I'm new here in Android.</p>
  
  <p>I would like to have information about what is the best way to create a database if not exists, and manage few tables with inner join queries.</p>
  
  <p>Do you have any web page explaining this subject?</p>
  
  <p>Thanks in advance.
  Regards.
  Jose</p>