sysdate与long类型互转
select sysdate, (sysdate- to_date('1970-01-01','yyyy-mm-dd'))* 24*60*60*1000current_milli from dual;--2011-10-27 11:21:55select to_date('1970-01-01 00:00:00','yyyy-mm-dd hh24:mi:ss')+ 1319714515000/1000/24/60/60 from dual?