（457）If two windows overlap,which window attribute will determine whether one should be chosen over the other?

A. WINDOW_PRIORITY

B. PRIORITY

C. PRIORITY_LEVEL

D. WINDOW_PRIORITY_LEVEL

E. OVERLAP_RULE

答案：（A）

解析：

DBMS_SCHEDULER.CREATE_WINDOW

window_priority = {LOW | HIGH},该参数只有在两个窗**叠时才有用.

因为在一个时间上只能有一个窗口有效, window_priority参数决定哪一个窗口打开.