Nuff Sed
Yes, you load the backup that you did 30 minutes ago, otherwise, no.
Anonymous
Alas, you have to arrange that ahead of time, before the event. You will need a snapshot of the database at a point in time, and a log of all the changes that were made after that so it can be played back to re-create the current state. Find out if your database has that kind of backup and logging set up.
Sandeep
No, that's the reason we take backups.
P
The short answer is no, unless you setup automated SQL backups to run every 30 minutes, however the fact you are asking probably means you did not.
Anonymous
Is it backed up?