How many transactions can we retrieve from flash back query in oracle9iR2?

For Example....
user1 deletes some records in the table1 at 10:30am
user2 adds some records in the table1 at 10:40am
user3 updates some records in the table1 at 11:00am
i have set the undo-retention parameter for 5 days.....
so can i retrieve all the transactions made from 10:30 to 11:00am?
or i will get only the last transaction at 11:00am?
also, how can i know the user1 deletes some records at a particular time?
how can i know the sql executed time?
I am using oracle9iR2
Thanks
sathyguy

> For Example....
I am going to set it for 3 or 4 hours.....not for 5 days...thats why i mentioned it as "for example" now im going to test this scenario in my r&d server.....with less undo_retention.
so....to find the transaction details (deleted or updated or etc....) i have to set up auditing or logminer...ok.....again the same doubt......
for example this is the case....
1. i set up the undo_retention=2 hours
2. i have the undo tablespace size as 3gb
3. i have set up the logminer to know the transaction details
will the undo tablespace will store all the deleted,updated records and tables for 2 hours?

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How many transactions can we retrieve from flash back query in oracle9iR2?

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