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How to force a log switch?

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How to force a log switch?

(a) By using ALTER SYSTEM LOG

(b) By using ALTER SYSTEM SWITCH LOGFILE

(c) By using ALTER SYSTEM SWITCH LOGS

(d) By using ALTER SYS LOGFILES

This question was posed to me in my homework.

The query is from Rapid Application Development topic in portion Database Programming Techniques of Database Management

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Right answer is (b) By using ALTER SYSTEM SWITCH LOGFILE

To explain: ALTER SYSTEM ARCHIVE LOG CURRENT is the best practice for production backup scripts with RMAN. .

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