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	 Administrator 
	
	
	
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		You need to open your standby db read-write, right? 
 snapshot standby is a good option.
 You can also use the guaranteed restore point;
  On Standby DB tier:
  alter database recover managed standby database cancel;
 alter database flashback on;
 create restore point OPEN_STANDBY guarantee flashback database;
 alter database activate standby database;
 alter database open;
 
  --you shouldn't directly open your standby database. You need to use the mechanisms/technologies which let you continue to feed this standby and make it sync with the PROD, after your developers finish their work.
	
	
	
	 
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