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You define an alert to be raised when the USERS tablespace usage has reached 80%of the total space. Which area would you refer to， in order to confirm that the alert has been raised due the event？（）
A:the alert.log file
B:the DBA_ALERTS view
C:the Database Control Home page
D:the Database Control performance page
E:the Database Control Maintenance page

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出自：Oracle认证

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