delete from MSS_RECORD where
GMT_CREATED BETWEEN
to_date(to_char(sysdate,‘yyyy-mm-dd‘) || ‘ 00:00:00‘,‘yyyy-mm-dd hh24:mi:ss‘) AND
to_date(to_char(sysdate,‘yyyy-mm-dd‘) || ‘ 23:59:59‘,‘yyyy-mm-dd hh24:mi:ss‘) ;
原文地址:http://www.cnblogs.com/muzhongjiang/p/3991302.html