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多项选择题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?()

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

  • B,C,D,F
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