多项选择题
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;
多项选择题 YouaremanaginganOracle11gdatabasewithASMstorage，forwhichtheCOMPATIBLEinitializationparameterissetto11.1.0.IntheASMinstance，theCOMPATIBLE.RDBMSattributeforthediskgroupissetto10.2andtheCOMPATIBLE.ASMattributeissetto11.1.WhichtwostatementsaretrueinthisscenarioforthefeaturesenabledforASM？（）
单项选择题 You are working on a 24X7 database. You want to design a backup strategy for your database that uses user managed backups. You want to be able to perform all backups while the database remains online. Which statement about performing user-managed backups in a 24x7 environment is true？（）
单项选择题 Examine the following RMAN script: RMAN> run { debug on; allocate channel c1 type disk; backup datafile 5; } Which statement describes the purpose of the script?（）