Using RMAN to unregister database

ENV:     11.2.0.2

So every night, as part of my RMAN backups, I sync the controlfiles with the catalog after the backup is done, which by the way, is much faster than connecting to the catalog “while” the backup is being done.

Anyway, I now have two incarnations of yesterday’s clone in the catalog which can play havoc with my scripts when I query the catalog for RMAN backup information.  We need to get rid of the old incarnation.

Using the following method will not work on 11.2.0.2 and after the example, I’ll show you what does work.

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