trunc(sysdate),si9000破解license

oracle trunc 用法 trunc(sysdate)
select trunc(trunc(sysdate'year'year firstday from dual
'month,round(sysdate'mm,trunc(sysdate'hh)fromdualselect
trunc(sysdate)
mysql truncsysdate_一日一句 sql[持续更新 mysql oracle