Based on backup and recovery

hello,
i have taken a backup at 3pm ,
some data was entered in an xx table at 5pm,
which was lost due to some reasons at 530pm,
now if i want to get back the data what i should do..

as we have a concept of time based recovery in oracle
what is the method used here to get my data back
i have taken my second backup at 7pm
its an imm. requirement for me
just help me out...
thnx & regards
pavanSimply use FULL recovery model to the database which benefits in - No work is lost due to a lost or damaged data file. Can recover to an arbitrary point in time (for example, prior to application or user error).