How can I recover my datafile?

How can I recover datafile without backup?

The Solution1Connect to the database using sqlplus and shutdown the database. SQLPLUS> shutdown immediate #(If this hangs, issue shutdown abort)2Mount the database: SQL> startup mount. Check for the datafile which needs recovery: ... 3Note the file number that was reported in the output above and run the below query:Oracle Database – How to recover from a lost datafile with no backup

How can I get my datafile online?

Moving datafiles online1Shut down the database.2Rename the physical file on the OS.3Start the database in mount mode.4Issue the ALTER DATABASE RENAME FILE command to rename the file within the Oracle dictionary.5Open the database.How to Make a Datafile Online in Oracle Database - Solvaria Blog ...

How do I know which datafile needs recovery?

Check for Data Files Stuck in Recover Mode1Go to the cmd prompt.2Start sqlplus.3At the sqlplus prompt, connect to the database (i.e., connect sys/password as sysdba).4Run the following query: ... 5If there are no rows returned here, then go to the section Check for Data Files that Need Recovery.How to Get Data Files Back Online

How do I restore a DBF file in Oracle?

SQL> RECOVER DATAFILE 'path'; Oracle checks for the archive redo log files that it needs to apply and displays the names of the files in a sequence. Enter AUTO in the SQL*Plus prompt screen to apply the files. After each log is applied, Oracle continues to apply the next redo log file until the recovery is complete.