oracle获得第二天的数据

select * from oa_schedule b
 where b.task_id in( 
 select a.wf_orunid from BPM.BPM_ArchivedData a 
  where a.wf_processid ='f4bc174a0f48d042f00a0e70eb26e5a0c733'
 ) and 
  --开始时间等于系统时间加上一天，为获得第二天的数据
  (SELECT TO_CHAR(b.start_time / (1000 * 60 * 60 * 24) +  
        TO_DATE('1970-01-01', 'YYYY-MM-DD'), 'YYYY-MM-DD') AS CDATE  
 from dual)=
  (select to_char(sysdate+1,'YYYY-mm-dd')
  from dual)