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Recovery full DB

Hello to all
This is my scenario
I had done the migration from 11g server A to 19c on another server B.
Everything went well I made backups in the source db and restore in the destination db at X date
Now several after some days since date x, we have worked with the db 11g, with source db
Ihave to update the db19c to day x-n (where n are the working days when the backup was taken)
my question is:
Do I have to do it all again,
1) RMAN full backup from 11g
2) restore DB and upgrade to 19g
therefore overwriting everything I had done last days ago(a lot of configuration and updating work),
or some other solution
that only updates the data changed in these days?
Thanks in advance for time and help
Answers
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Yes, you have to do it again, or use export/import. If you have the license and appropriate source version you can also use Data Guard and a logical standby for the purpose of migrating and upgrading. See https://docs.oracle.com/en/solutions/reduce-database-migration-downtime/learn-migrating-oracle-data-guard1.html#GUID-8B3… about the later.
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Thank you
>>> you have the license and appropriate source version you can also use Data Guard
No I have not
Have a good WE