QUESTION 71
Note the following statements that use flashback technology:
1. FLASHBACK TABLE <table> TO SCN <scn>;
2. SELECT * FROM <table> AS OF SCN 123456;
3. FLASHBACK TABLE <table> TO BEFORE DROP;
4. FLASHBACK DATABASE TO TIMESTAMP <timestamp>;
5. SELECT * FROM <table> VERSIONS AS OF SCN 123456 AND 123999;
Which of these statements will be dependent on the availability of relevant undo data in the undo segment?
A. 1, 2, and 5
B. 1, 3, and 4
C. 2, 3, 4, and 5
D. 1, 2, 3, 4, and 5
Answer: A
同648题：http://blog.csdn.net/rlhua/article/details/12431787
Explanation/Reference:
Section: Flashback Operations & Configuration