Oracle 查询两个时间段内的所有日期列表

1、查询某时间段内日期列表

select level,to_char(to_date('2013-12-31','yyyy-mm-dd')+level-1,'yyyy-mm-dd') as date_time
from dual
connect by level <=to_date('2014-01-03','yyyy-mm-dd')-to_date('2013-12-31','yyyy-mm-dd')+1 

2、查询前两个月日期列表

 SELECT T.DATE_ID FROM (
 select to_char(ADD_MONTHS( TO_DATE(to_char(sysdate-,'yyyyMMdd'),'yyyyMMdd' ) ,- )+ rownum,'yyyyMMdd' ) DATE_ID
 from dual
 connect by rownum <=to_date(to_char(sysdate-,'yyyyMMdd'),'yyyyMMdd')-ADD_MONTHS( TO_DATE(to_char(sysdate-,'yyyyMMdd'),'YYYYMMDD' ) ,-  )
 ) t order by DATE_ID desc 

3.查询月份列表

 SELECT TO_CHAR(ADD_MONTHS(TO_DATE('2014-10', 'yyyy-MM'), ROWNUM - ),
                'yyyyMM') as monthlist
   FROM DUAL
 CONNECT BY ROWNUM <=
            months_between(to_date('2015-06', 'yyyy-MM'),
                           to_date('2014-10', 'yyyy-MM')) +  

4.年份列表

 SELECT
     TO_CHAR( ADD_MONTHS( TO_DATE( '2014-10' ,'yyyy-MM' ) ,( ROWNUM -  ) *  ) ,'yyyy' ) AS yearlist
 FROM
     DUAL CONNECT BY ROWNUM <= months_between(
         to_date(
             '2015-06' ,
             'yyyy-MM'
         ) ,
         to_date(
             '2014-10' ,
             'yyyy-MM'
         )
     ) /  +