title: Is there any very Light weight database java library?
body: <p>I have developed an web application using servlets and MySQL. and now am in need of deploying it to Google AppEngine..
  But Appengine uses a totally different datastore that need a major modification of the database part..</p>
  
  <p>So I would like to know if there are any light-weight database java library that can be deployed along with the main application..</p>
  
  <p>PS: Database part doesn't involve intense queries.. just simple insert and select queries..</p>