In this post, you’ll learn more about the Oracle ErrorORA-01245: offline file string will be lost if RESETLOGS is done with the details on why you receive this error and the possible solution to fix it.
Oracle Error Description
ORA-01245: offline file string will be lost if RESETLOGS is done
Reason for the Error ORA-01245: offline file string will be lost if RESETLOGS is done
Attempting to do an OPEN RESETLOGS with a file that will be lost because it is offline. The file was not taken offline with the FOR DROP option.
How to fix the Error ORA-01245: offline file string will be lost if RESETLOGS is done ?
You can fix this error in Oracle by following the below steps
Either bring the file online and recover it, or take it offline with the FOR DROP option.