多选题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.)AALTER DATABASE FLASHBACK ON;BGRANT SELECT any transaction TO scott;CGRANT EXECUTE ON dbms_flashback TO scott;DALTER DATABASE ADD SUPPLEMENTAL LOG DATA;EALTER TABLESPACE undots1 RETENTION GUARANTEE;FALTER DATABASE ADD SUPPLEMENTAL LOG DATA (PRIMARY KEY) COLUMNS;
多选题
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;
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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;
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多选题On Jan 11， 2005 at 2：30 P.M.， an erroneous update operation modified all the values of column LASTNAME in the EMPLOYEE table in the Scott schema to an empty string. You are the system administrator， and you want to return the original values in the table. To do so， you decided to flash back the table. Which two options can you use to flash back a table？（）Aby using Oracle Enterprise ManagerBby issuing the FLASHBACK TABLE statement at the RMAN promptCby issuing the FLASHBACK TABLE statement at the SQL promptDby issuing the FLASHBACK TABLE statement at the LSNRCTL prompt
单选题You are performing flashback of the ORDERS table in the Scott’s schema because some important data is deleted in the table by mistake. The SCN number was 771513 at the time of deletion. You issued the following statement to perform Flashback Table： SQL FLASHBACK TABLE ORDERS TO SCN 771513； What is the prerequisite to perform Flashback Table？（）A You must configure OMF in your database.B You must enable block change tracking feature in your database.C You must enable ROW MOVEMENT feature on the ORDERS table.D You must use the Flashback Version Query before using the Flashback Table feature.
单选题You are working in an online transaction processing （OLTP） environment. You used the FLASHBACK TABLE command to flash back the CUSTOMERS table. Before executing the FLASHBACK TABLE command， the System Change Number （SCN） was 663571. After flashing back the CUSTOMERS table， you realize that the table is not in the correct state and the resultant changes are not what you had desired. So， you need to reverse the effects of the FLASHBACK TABLE command while ensuring that： a） No other user data in the database is affected. b） The operation takes the minimum possible time. Which option would you choose？（）A Use ROLLBACK command with SCN 663571.B Perform Flashback Transaction Query with SCN 663571.C Execute the FLASHBACK DATABASE statement to retrieve the CUSTOMERS table as it was at SCN 663571.D Execute another FLASHBACK TABLE statement to retrieve the CUSTOMERS table as it was at SCN 663571.
单选题You are shrinking the SCOTT.EMP table by executing the ALTER TABLE SCOTT.EMP SHRINK SPACE CASCADE statement. What is a prerequisite for shrinking the SCOTT.EMP table？（）A You must enable the block change tracking feature.B You must have enable the flashback feature.C You must use the OMF in your database.D You must define the tablespace of the SCOTT.EMP table for automatic segment space management.
多选题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？（）AALTER DATABASE FLASHBACK ONBGRANT SELECT any transaction TO scottCGRANT EXECUTE ON dbms_flashback TO scottDALTER DATABASE ADD SUPPLEMENTAL LOG DATAEALTER TABLESPACE undots1 RETENTION GUARANTEEFALTER DATABASE ADD SUPPLEMENTAL LOG DATA （PRIMARY KEY） COLUMNS
单选题You are working as a DBA at NetFx Corporation. You discover that the SCOTT schema is deleted by mistake. You decide to flash the database back to the time when the schema existed. Which view will you query to determine the estimated size of the flashback data that you require for your current target retention？（）A V$FLASHBACK_DATABASE_LOGB V$FLASHBACK_DATABASE_STATC V$DATABASED V$UNDOSTAT
多选题What are the prerequisites for performing flashback transactions? （）(Choose all that apply)ASupplemental log must be enabledBSupplemental log must be enabled for the primary keyCUndo retention guarantee for the database must be configuredD”EXECUTE “ permission on the DBMS_FLASHBACK package must be granted to the user