多项选择题
User SCOTT wants to back out the transactions on the REGIONS table in his schema. As a DBA, whichcommands 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;
相关考题
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多项选择题
YouaremanaginganOracle11gdatabasewithASMstorage，forwhichtheCOMPATIBLEinitializationparameterissetto11.1.0.IntheASMinstance，theCOMPATIBLE.RDBMSattributeforthediskgroupissetto10.2andtheCOMPATIBLE.ASMattributeissetto11.1.WhichtwostatementsaretrueinthisscenarioforthefeaturesenabledforASM？（）
A. The ASM-preferred mirror read feature is enabled.
B. The ASM supports variable sizes for extents of 1，8，and 64 allocation units.
C. The ASM disk is dropped immediately from a disk group when it becomes unavailable.
D. The RDBMS always reads the primary copy of a mirrored extent of the ASM disk group. -
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？（）
A. You must have change tracking enabled in your database
B. Your database must be running in NOARCHIVELOG mode
C. To back up a tablespace，it must be in backup mode
D. To back up a tablespace，it must first be taken offline -
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?（）
A. The data file is checked for physical corruption and backed up if found clean.
B. The backup of data file 5 is performed and the interactive messages during the backup are suppressed.
C. The existing backup for the data file is checked and the backup is performed if there are changes in the data file after the last backup.
D. The backup of data file 5 is performed and all SQL statements that are executed during RMAN compilation and their results are displayed
