Note the following statements that use flashback technology: 1. FLASHBACK TABLE
TO SCN ; 2. SELECT * FROM AS OF SCN 123456; 3. FLASHBACK TABLE TO BEFORE DROP; 4. FLASHBACK DATABASE TO TIMESTAMP ; 5. SELECT * FROM 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
正确答案:A
答案解析:有
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