You are attempting to clear an unarchived redo log file. In order to manually enact a log switch, which of the following statements is appropriate?（）<br>A:ALTER DATABASE <br>B:ALTER SYSTEM <br>C:ALTER USER <br>D:ALTER REDO LOG

You are attempting to clear an unarchived redo log file. In order to manually enact a log switch, which of the following statements is appropriate?（）
A:ALTER DATABASE
B:ALTER SYSTEM
C:ALTER USER
D:ALTER REDO LOG

出自：Oracle认证

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