trunc(sysdate),si9000破解license

earliest_start_date between trunc(sysdate-12 and trunc(sysdate
interval参数值天天午夜12点 trunc(sysdate
a so_date trunc sysdate 1
(add_months(trunc(sysdate'y,12 trunc(sysdate
round(sysdate'dd)fromdual;selectsysdate,trunc(sysdate)fromdual