Oracle Exam 1Z0-067 Topic 6 Question 21 Discussion

Examine the statements that use flashback technologies:

1. FLASHBACK TABLE customers TO TIMESTAMP TO_TIMESTAMP ('2013-02-04 09:30:00', 'YYYY-MM-DD HH:MI:SS');

2. SELECT * FROM customers AS OF SCN 123456;

3. FLASHBACK TABLE customers TO BEFORE DROP;

4. FLASHBACK DATABASE TO TIMESTAMP TO_TIMESTAMP ('2013-02-04 09:30:00', 'YYYY-MM-DD HH:MI:SS');

5. SELECT * FROM customers VERSIONS BETWEEN SCN 123456 AND 123999;

6. ALTER TABLE customers FLASHBACK ARCHIVE;

Which set of statements depends on the availability of relevant undo data in the undo tablespace? (Choose the best answer.)