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单选题
You want to track and store all transactional changes to a table over its lifetime. To accomplish this task, you enabled Flashback Data Archive with the retention of 5 years. After some time, the business requirement changed and you are asked to change the retention period from 5 years to 3 years. To accomplish this, you issued the following command: ALTER FLASHBACK ARCHIVE fla1 MODIFY RETENTION 3 YEARS; What is the outcome of this command?（）
A
The command produces an error because the retention period cannot be reduced
B
All historical data older than 3 years is purged from the flashback archive FLA1
C
All historical data is retained but the subsequent flashback data archives are maintained for only 3 years
D
All historical data is transferred to flashback logs and the flashback archive is refreshed to set a new retention time
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更多 “单选题You want to track and store all transactional changes to a table over its lifetime. To accomplish this task, you enabled Flashback Data Archive with the retention of 5 years. After some time, the business requirement changed and you are asked to change the retention period from 5 years to 3 years. To accomplish this, you issued the following command: ALTER FLASHBACK ARCHIVE fla1 MODIFY RETENTION 3 YEARS; What is the outcome of this command?（）A The command produces an error because the retention period cannot be reducedB All historical data older than 3 years is purged from the flashback archive FLA1C All historical data is retained but the subsequent flashback data archives are maintained for only 3 yearsD All historical data is transferred to flashback logs and the flashback archive is refreshed to set a new retention time” 相关考题
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考题
单选题You want to track and store all transactional changes to a table over its lifetime. To accomplish this task， you enabled Flashback Data Archive with the retention of 5 years. After some time， the business requirement changed and you were asked to change the retention from 5 years to 3 years. To accomplish this， you issued the following command： ALTER FLASHBACK ARCHIVE fla1 MODIFY RETENTION 3 YEAR； What is the implication of this command？（）A
The command produces an error because the retention time cannot be reduced.B
All historical data is retained but the subsequent flashback data archives are maintained for only three years.C
All historical data is purged and the new flashback data archives are maintained for three years.D
All historical data older than three years is purged from the flashback archive FLA1.
考题
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When you want all unauthenticated traffic to be redirectedB
When you want all clear text traffic to be redirected.C
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单选题You want to use the Flashback Transaction Query feature to identify all the changes made to your database within a specific time period. What is a prerequisite for using the Flashback Transaction Query feature？（）A
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recommendB
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