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What are the states of a rollback segment? What is the difference between partly available and needs recovery in Oracle?

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What are the states of a rollback segment? What is the difference between partly available and needs recovery in Oracle?
posted Dec 22, 2014 by Archana

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The various states of a rollback segment are:
ONLINE, OFFLINE, PARTLY AVAILABLE, NEEDS RECOVERY and INVALID.

answer Dec 23, 2014 by Arun Gowda
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