比较时间
select * from up_date where update < to_date('2007-09-07 00:00:00','yyyy-mm-dd hh24:mi:ss') select * from up_date where update <= to_date('2007-09-07 00:00:00','yyyy-mm-dd hh24:mi:ss')
生成一个guid
SELECT sys_guid() from dual;
转载于:https://www.cnblogs.com/leiwei/p/3615356.html
