title: SQLiteOpenHelper onUpgrade() Confusion Android
body: <p>I am doing my first app with a database and I am having a little trouble understanding the onUpgrade function.  My database has a table with an items and a favorite column so that the user can favorite an item.  Most implementations I see simply drop the table and reconstruct it but I don't want to do this. I want to be able to add more items to the table.  </p>
  
  <p>When the app is upgraded through the android marketplace does the database know its version number?  So could I increment the version number in the code and then export it to the marketplace and when the user boots up the upgraded version for the first time then onUpgrade will be called?  </p>
  
  <p>If this is the case my onUpgrade would simply pull from a file and add the database items in.  Is this a standard way of doing things or is there a better way of handling this in Android.  I am trying to stay as standard as possible.</p>
  
  <p>Thanks</p>