Hi all
I need some ideas from you all
My problem is like this
I have a java application in which i use nearly 50 tables and its running perfectly
I have given this application to a customer.
Now i have improved my application by adding some more features
for that i have added few more new tables and in some old tables i have added new fields and some i have removed to improve my performance
of my application
now i have to upgrade my old appplcation with the new one without loosing my old data
how to do this
The main problem is since i have changed the schema of old tables
i am not able to upgrade that . I don't have any problem with the new tables i added.
Please give some ideas...