What is switch datafile all?

Question

DATAFILE ALL. Specifies that all data files for which a SET NEWNAME FOR DATAFILE command has been issued in this job are switched to their new name (see Example 3-56). DATAFILE datafileSpec. Specifies the data file that are renaming. After the switch, the control file no longer considers the specified file as current.

What is the use of datafile in Oracle?

Data files are the operating system files that store the data within the database. The data is written to these files in an Oracle proprietary format that cannot be read by other programs.

How do I recover a lost datafile in Oracle?

How to recover missing datafiles?1 Find the missing datafiles: ... 2 Take tablespace or datafiles offline: ... 3 Rename missing datafiles with original files: ... 4 Shutdown and mount the database: ... 5 Perform media recovery: ... 6 Open the database: ... 7 check the status of datafiles: ... 8 Bring the datafiles online:How to recover missing datafiles? | SAP Blogs

Can you drop a datafile?

If a datafile is not empty, it cannot be dropped. If you must remove a datafile that is not empty and that cannot be made empty by dropping schema objects, you must drop the tablespace that contains the datafile. You cannot drop the first or only datafile in a tablespace.

How do I restore a control file?

You can restore the control file from a known control file copy using this form of the command: RMAN> RESTORE CONTROLFILE from 'filename'; The control file copy found at the location specified by filename will be written to all locations listed in the CONTROL_FILES initialization parameter.

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