单项选择题
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
单项选择题 Consider the following code snippet: If this code were executed, which of the following statements would be true?（）
多项选择题 WhichtwostatementsaretrueregardingtheORDERBYclause?（）
多项选择题 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?（）