Which statements are true regarding the system-defined moving window baseline in Oracle Database 11g？（）<br>A: It does not allow you to change the moving window size.<br>B: Adaptive threshold functionalities use it by default to compute statistics.<br>C: It is created by default with the window size being equal to the AWR retention time.<br>D: It is created when the first snapshot is collected by the Automatic Workload Repository （AWR）.

Which statements are true regarding the system-defined moving window baseline in Oracle Database 11g？（）
A: It does not allow you to change the moving window size.
B: Adaptive threshold functionalities use it by default to compute statistics.
C: It is created by default with the window size being equal to the AWR retention time.
D: It is created when the first snapshot is collected by the Automatic Workload Repository （AWR）.

出自：Oracle认证

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