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-1,'yyyyMMdd'),'yyyyMMdd' ) ,- 2)+ rownum,'yyyyMMdd' ) DATE_ID
from dual
connect by rownum <=to_date(to_char(sysdate-1,'yyyyMMdd'),'yyyyMMdd')-ADD_MONTHS( TO_DATE(to_char(sysdate-1,'yyyyMMdd'),'YYYYMMDD' ) ,- 2 )
) 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 - 1),
               'yyyyMM') as monthlist
  FROM DUAL
CONNECT BY ROWNUM <=
           months_between(to_date('2015-06', 'yyyy-MM'),
                          to_date('2014-10', 'yyyy-MM')) + 1
4.年份列表
SELECT
    TO_CHAR( ADD_MONTHS( TO_DATE( '2014-10' ,'yyyy-MM' ) ,( ROWNUM - 1 ) * 12 ) ,'yyyy' ) AS yearlist
FROM
    DUAL CONNECT BY ROWNUM <= months_between(
        to_date(
            '2015-06' ,
            'yyyy-MM'
        ) ,
        to_date(
            '2014-10' ,
            'yyyy-MM'
        )
    ) / 12 + 1