Hibernate Advantages & Dis Advantages

Advantages:

1. Converting JAVA datatypes to DATABASE datatypes.
        For Example: int --> number,   string --> varchar2.
 
2. Auto generation of Schema & Tables.
       hbm2ddl.auto = validate | update | create | create-drop
    create = Creates new schema/table by dropping existing schema/table.
    update = Updates the existing schema/table. If table doesn't exist, it creates 
             new one.
    create-drop = creates new schema/table but it drops when session factory is 
                  closed.

3. Automatic primary key generation.
       Identity                    -   MySQL, SQL Server, DB2, HQSQL
       Sequence                 -   Oracle, Postgre SQL, SQL Server, DB2, HQSQL
       Table (Sequence)    -    Using a database table.