What is database persistence?
To saving the data within the database is called as database persistence. The database persistence is one of the fundamental concepts of software application development. There are various options to apply persistence. The Object/ Relational Mapping is the technique that hibernate tool uses to persist the data. By utilizing the ORM toll like Hibernate, you get the benefits like low SQL coding, easy to maintain the system and also leads to improve the performance.
For more about database persistence read this article http://www.roseindia.net/hibernate/hibernate4/hibernatePersist.shtml