Restoration of data file loss in Oracle database environment

Source: Internet
Author: User

Database archive mode: Create the table space testtbs and the data file testtbs. dbf.

Close Database

Delete the data file testtbs. dbf

Start Database


Tip:

ORA-01157: unable to identify/lock data file 2-see DBWR trace file

ORA-01110: data file 2: D: ORACLEORADATAHAHATESTTBS. DBF


This data file has not been backed up. How can this problem be recovered?


The procedure is as follows:


SQL> alter database datafile 2 offline drop;

The database has been changed.

SQL> alter database open;

The database has been changed.

SQL> alter database create datafile D: ORACLEORADATAHAHATESTTBS. DBF;

SQL> recover datafile 2;

Media recovery is completed.

SQL> alter tablespace testtbs online;

The tablespace has been changed.

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