oracle 与mysql 的当前时间比较

select
        p.id,p.order_Num,p.image_url,p.url,p.image_topic,
        p.is_download,
        p.big_image_url,
        p.begin_time,p.end_time
        from PAGE_INDEX_IMG p where p.is_delete='N'

                         and p.image_Type =7

                         and p.url =app

                  and now() >=p.begin_time
                   and now()<p.end_time
        order by p.order_Num

 select eht.TAB_ID,eht.TAB_NAME from EC_HOMEPAGE_TAB  eht
        WHERE eht.IS_DELETE = 'N'

            AND eht.STATE_NUM <> 1
            AND TO_DATE(eht.ONLINE_TIME,'YYYY/MM/DD hh24:mi:ss') <= SYSDATE
           AND TO_DATE(eht.OFFLINE_TIME,'YYYY/MM/DD hh24:mi:ss') >= SYSDATE

        ORDER BY  eht.ORDER_NUM;