To recover a table from an RMAN backup to a specified point in time, you need to follow a logical sequence of steps. First, you need to determine which backup contains the table that needs to be recovered. Once identified, issue the recover table RMAN command specifying the auxiliary destination and point in time. Finally, create a Data Pump export dump file of the recovered table and import it back into the target instance. This ensures the table is restored to its correct state and integrated back into the main database.
The command 'RECOVER DATABASE USING BACKUP CONTROLFILE UNTIL CANCEL;' is used in scenarios that involve recovery from situations where the control file is not current or is missing. One scenario where this command is required is when the current online redo log file is missing; this prevents the database from being recovered normally, necessitating the use of a backup control file. Another scenario is when the database backup is older than the control file backup; this command allows recovery to continue by using the backup control file, which might be necessary if the current control file is not available or valid.
To set up Flashback Data Archive, Automatic Undo Management must be enabled because it manages undo data automatically, ensuring that undo information is retained as needed for Flashback operations. Additionally, the tablespace in which the Flashback Data Archive is created should have Automatic Segment Space Management (ASSM) enabled to efficiently manage space within the tablespace, which is crucial for the proper functioning and storage of historical data.
The ADR base location is determined by the DIAGNOSTIC_DEST initialization parameter. If DIAGNOSTIC_DEST is not explicitly set, the environmental variable ORACLE_BASE is used to determine the ADR base location. Given that ORACLE_BASE is set to /u01/app/oracle, this path becomes the ADR base location.
To successfully export the pluggable database (PDB) hr_pdb1 from the multitenant container database (CDB) CDB1 and import it into the cdb2 CDB as the emp_pdb1 PDB, the following steps must be followed in sequence: 1) Export hr_pdb1 using the full clause to export all its data and configurations. 2) Create the new PDB emp_pdb1 which will host the imported data. 3) Open emp_pdb1 to get it ready for data import. 4) Create a Data Pump directory in emp_pdb1 to store the dump file. 5) Copy the dump file to the Data Pump directory created. 6) Import the data into emp_pdb1 using the full and remap clauses to ensure the data is correctly mapped into the new PDB. These steps ensure that all necessary elements, excluding tablespace creation which is handled during the import using the full clause, are covered.