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I am using hibernate and whenever I try to add a record it drops the table and adds it again. It never uses the existing table and make changes on that. This is the relevant part of my hibernate.cfg.xml : <hibernate-configuration> <session-factory> <property name="hibernate.connection.driver_class">org.apache.derby.jdbc.ClientDriver</property> <property name="hibernate.connection.url">jdbc:derby://localhost:1527/sample</property> <property name="hibernate.connection.username">user</property> <property name="hibernate.connection.password">password</property> <property name="hibernate.connection.pool_size">10</property> <property name="show_sql">true</property> <property name="dialect">org.hibernate.dialect.DerbyDialect</property> <property name="hibernate.hbm2ddl.auto">update</property> <property name = "current_session_context_class">thread</property>  <mapping class="inputDetails.Table1"/> <mapping class="inputDetails.Table2"/>  </session-factory> </hibernate-configuration> This is how I save data: SessionFactory factory = new Configuration().configure().buildSessionFactory(); Session session = factory.getCurrentSession(); session.beginTransaction(); //... session.save(newrecord) session.getTransaction().commit();

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