（445）To set the history retention period for either window logging or job logging individually,

which parameters of the SET_SCHEDULER_ATTRIBUTE procedure need to be used?(Choose all that apply.)

A. LOG_HISTORY

B. JOB_LOG_RETENTION

C. WINDOW_LOG_RETENTION

D. WHICH_LOG

E. LOG_NAME

答案：（A，D）

解析：

DBMS_SCHEDULER.SET_SCHEDULER_ATTRIBUTE

LOG_HISTORY,job log和window log的log entry被保留的天数, [0, 1000000], 30

这个过程根本就没有WHICH_LOG参数