单项选择题

Which of the following calendaring syntax expressions would evaluate to the last day of every month？（）

A. FREQ = MONTHLY； BYMONTHDAY = 31
B. FREQ = MONTHLY； BYMONTHDAY = -1
C. FREQ = DAILY； BYDAY = -1
D. FREQ = MONTHLY； BYDAY = 31
E. FREQ = DAILY； BYMONTHDAY = LAST_DAY

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单项选择题

Consider the following code snippet：
BEGIN
DBMS_SCHEDULER.SET_ATTRIBUTE （ name => ，，lne_job1， attribute => ，，job_priority， value => 1）；
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