生成开始日期和结束日期之间的日期

时间:2016-02-11 06:17:47

标签: plsql oracle11g

我需要在两个给定日期之间生成所有日期。这是问题陈述:

输入:

START_DATE  END_DATE 
----------  ----------
01-FEB-16   03-FEB-16   
01-FEB-16   04-FEB-16   
01-FEB-16   05-FEB-16 
01-FEB-16   03-FEB-16 
11-FEB-16   14-FEB-16   

输出(开始日期和结束日期之间的所有日期):

BETWEEN_START_AND_END
----------------------
01-FEB-16   
02-FEB-16   
03-FEB-16
04-FEB-16   
05-FEB-16   
11-FEB-16 
12-FEB-16 
13-FEB-16 
14-FEB-16

4 个答案:

答案 0 :(得分:0)

尝试;

WITH date_tbl AS ( --get (max end_date diff) group by START_DATE
    SELECT 
        Trunc(START_DATE) Min_date, 
        max(Trunc(END_DATE)) - Trunc(START_DATE) diff       
    FROM tbl
    GROUP BY Trunc(START_DATE)
),
num_tbl AS ( --data to join the table [0 , 1, 2, 3 ..... max(diff) + 1]
    SELECT LEVEL - 1 lev
    FROM  dual
    CONNECT BY LEVEL <= (SELECT Max(diff) + 1 FROM date_tbl) 
)
SELECT DISTINCT Min_date + lev date_col --adding level to get all date
FROM num_tbl JOIN date_tbl
ON lev <= diff 
ORDER BY Min_date + lev

<强>演示

with tbl(start_date, end_date) as (
     select Date '2016-02-01', Date '2016-02-03' from dual union all
     select Date '2016-02-01', Date '2016-02-04' from dual union all
     select Date '2016-02-01', Date '2016-02-05' from dual union all
     select Date '2016-02-01', Date '2016-02-03' from dual union all
     select Date '2016-02-11', Date '2016-02-14' from dual
),
date_tbl AS ( --get max end_date group by START_DATE
    SELECT 
        Trunc(START_DATE) Min_date, 
        max(Trunc(END_DATE)) - Trunc(START_DATE) diff       
    FROM tbl
    GROUP BY Trunc(START_DATE)
),
num_tbl AS ( --data to join the table [0 ,1 , 2, 3 ..... max(diff) + 1]
    SELECT LEVEL - 1 lev
    FROM  dual
    CONNECT BY LEVEL <= (SELECT Max(diff) + 1 FROM date_tbl) 
)
SELECT DISTINCT Min_date + lev date_col
FROM num_tbl JOIN date_tbl
ON lev <= diff
ORDER BY Min_date + lev

输出

DATE_COL
01.02.2016
02.02.2016
03.02.2016
04.02.2016
05.02.2016
11.02.2016
12.02.2016
13.02.2016
14.02.2016

答案 1 :(得分:0)

查询:

with y(start_date, end_date, m) as (
select start_date, end_date, case when start_date > lag(end_date) over (order by start_date, end_date) then 1 else 0 end
from your_table
)
,z(start_date, end_date, group_number) as (
select start_date, end_date, sum(m) over (order by start_date, end_date) from y
)
,a(start_date, end_date, group_number) as (
select min(start_date), max(end_date), group_number
from z
group by group_number
)
select start_date + level - 1
from a
connect by start_date + level - 1 <= end_date
and prior group_number =  group_number
and prior SYS_GUID() is not null
order by 1;

示例:

with x(start_date, end_date) as (
  select date'2016-02-01', date'2016-02-03' from dual union all
  select date'2016-02-01', date'2016-02-05' from dual union all
  select date'2016-02-01', date'2016-02-03' from dual union all
  select date'2016-02-11', date'2016-02-14' from dual union all
  select date'2016-02-02', date'2016-02-07' from dual union all
  select date'2016-02-02', date'2016-02-05' from dual union all
  select date'2016-02-12', date'2016-02-15' from dual union all
  select date'2016-02-11', date'2016-02-17' from dual union all
  select date'2016-02-19', date'2016-02-21' from dual
)
,y(start_date, end_date, m) as (
select start_date, end_date, case when start_date > lag(end_date) over (order by start_date, end_date) then 1 else 0 end
from x
)
,z(start_date, end_date, group_number) as (
select start_date, end_date, sum(m) over (order by start_date, end_date) from y
)
,a(start_date, end_date, group_number) as (
select min(start_date), max(end_date), group_number
from z
group by group_number
)
select start_date + level - 1
from a
connect by start_date + level - 1 <= end_date
and prior group_number =  group_number
and prior SYS_GUID() is not null
order by 1;

结果:

start_date + level - 1
----------------------
01-FEB-16
02-FEB-16
03-FEB-16
04-FEB-16
05-FEB-16
06-FEB-16
07-FEB-16
11-FEB-16
12-FEB-16
13-FEB-16
14-FEB-16
15-FEB-16
16-FEB-16
17-FEB-16
19-FEB-16
20-FEB-16
21-FEB-16

答案 2 :(得分:0)

为了达到最佳性能,最好合并重叠间隔,然后在这些间隔的开始和结束日期之间为每一天生成一行。以下查询显示了如何执行此操作。

SQL> with intervals as (
  2     select 1 as interval_id,
  3         to_date('01-FEB-16','dd-mon-yy') as start_date,
  4         to_date('03-FEB-16','dd-mon-yy') as end_date
  5     from dual
  6     union all
  7     select 2 as interval_id,
  8         to_date('02-FEB-16','dd-mon-yy') as start_date,
  9         to_date('04-FEB-16','dd-mon-yy') as end_date
 10     from dual
 11     union all
 12     select 3 as interval_id,
 13         to_date('03-FEB-16','dd-mon-yy') as start_date,
 14         to_date('05-FEB-16','dd-mon-yy') as end_date
 15     from dual
 16     union all
 17     select 4 as interval_id,
 18         to_date('01-FEB-16','dd-mon-yy') as start_date,
 19         to_date('04-FEB-16','dd-mon-yy') as end_date
 20     from dual
 21     union all
 22     select 5 as interval_id,
 23         to_date('11-FEB-16','dd-mon-yy') as start_date,
 24         to_date('14-FEB-16','dd-mon-yy') as end_date
 25     from dual
 26  ), overlapping_intervals as (
 27     select case
 28             when prev_end is null
 29                 then idx
 30             when start_date <= prev_end
 31                 then idx - lag(idx) over (order by start_date, interval_id)
 32                 else -idx
 33             end as overlap_interval_id,
 34         t.*
 35     from (
 36             select row_number() over (order by start_date, interval_id) as idx,
 37                 lag(end_date) over (order by start_date, interval_id) as prev_end,
 38                 i.*
 39             from intervals i
 40         ) t
 41     order by start_date, interval_id
 42  ), non_overlapping_intervals as (
 43     select overlap_interval_id,
 44         min(start_date) as start_date,
 45         max(end_date) as end_date
 46     from overlapping_intervals
 47     group by overlap_interval_id
 48  )
 49  select /*+rule*/start_date + level-1 as day, i.*
 50  from non_overlapping_intervals i
 51  connect by overlap_interval_id = prior overlap_interval_id
 52     and level < end_date-start_date+1
 53     and prior dbms_random.value is not null -- <-- workaround to bypass ORA-01436 thrown by the DB
 54  order by day
 55  /

DAY         OVERLAP_INTERVAL_ID START_DATE  END_DATE
----------- ------------------- ----------- -----------
01/02/2016                    1 01/02/2016  05/02/2016
02/02/2016                    1 01/02/2016  05/02/2016
03/02/2016                    1 01/02/2016  05/02/2016
04/02/2016                    1 01/02/2016  05/02/2016
11/02/2016                   -5 11/02/2016  14/02/2016
12/02/2016                   -5 11/02/2016  14/02/2016
13/02/2016                   -5 11/02/2016  14/02/2016

7 rows selected

SQL> 

答案 3 :(得分:0)

尝试一下...我让您更改日期格式以适合您的...

with tbl(start_date,
end_date) as
 (select date '2016-02-01'
        ,date '2016-02-03'
    from dual
  union all
  select date '2016-02-01'
        ,date '2016-02-04'
    from dual
  union all
  select date '2016-02-01'
        ,date '2016-02-05'
    from dual
  union all
  select date '2016-02-01'
        ,date '2016-02-03'
    from dual
  union all
  select date '2016-02-11'
        ,date '2016-02-14'
    from dual)
select distinct start_date + level - 1
  from tbl
connect by start_date + level - 1 <= end_date
 order by 1;

将输出

01/02/2016
02/02/2016
03/02/2016
04/02/2016
05/02/2016
11/02/2016
12/02/2016
13/02/2016
14/02/2016