------------------------查询---------------------------------
select to_char(addtime, 'YYYY-MM-DD HH24:MI:SS ') from zemember;
SELECT * FROM zereviewplan where addtime <to_date('2017-01-01 00:00:00','yyyy-MM-dd hh24:mi:ss');
-----------------------修改----------------------------------
update zemember set modifytime=to_date('2010-01-02 11:54:30','yyyy-MM-dd hh24:mi:ss') where username='fanyali';
切记:
to_char(addtime, 'YYYY-MM-DD HH24:MI:SS ')
to_date('2017-2-29','yyyy-mm-dd')