104 User SCOTT wants to back out the transactions on the REGIONS table in his schema. As a DBA, whic

104

User SCOTT wants to back out the transactions on the REGIONS table in his schema. As a DBA, which

commands must you execute to enable SCOTT to flash back the transactions? (Choose four.)

A. ALTER DATABASE FLASHBACK ON;

B. GRANT SELECT any transaction TO scott;

C. GRANT EXECUTE ON dbms_flashback TO scott;

D. ALTER DATABASE ADD SUPPLEMENTAL LOG DATA;

E. ALTER TABLESPACE undots1 RETENTION GUARANTEE;

F. ALTER DATABASE ADD SUPPLEMENTAL LOG DATA (PRIMARY KEY) COLUMNS;

Correct Answer: BCDF

Section: (none)

Explanation

Explanation/Reference:

事务闪回的4个先决条件