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
出自:Oracle认证