What does the DB_FLASHBACK_RETENTION_TARGET parameter configure？（） <br>A: An upper limit on how far you can flash back the database，depending on the information in the redo logs<br>B: An upper limit on how far you can flash back the database，depending on the information in the undo tablespace<br>C: The amount of time for which the flashback data is to be kept in the flash recovery area， provided that there is enough space<br>D: The amount of time for which the flashback data is guaranteed to be kept in the undo tablespace，provided that there is enough space

What does the DB_FLASHBACK_RETENTION_TARGET parameter configure？（）
A: An upper limit on how far you can flash back the database，depending on the information in the redo logs
B: An upper limit on how far you can flash back the database，depending on the information in the undo tablespace
C: The amount of time for which the flashback data is to be kept in the flash recovery area， provided that there is enough space
D: The amount of time for which the flashback data is guaranteed to be kept in the undo tablespace，provided that there is enough space

出自：Oracle认证

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