Hi Dengyong,
Thanks for the suggestions 
Yes but deleting the table records and then adding the modified entries is not an option. This is because I have to change only few records in the table but the issue is that. for changing these few records, I have to scan this entire table and this may result in a timeout.
But I am interested in this 'Open Dataset' that you mentioned. Could you tell me more on this??
Thanks,
Sameer.