选择排名靠前的重叠段SQL
我正在寻找一种方法来选择排名靠前的重叠部分。表将如下所示:选择排名靠前的重叠段SQL,sql,sql-server-2008-r2,ranking,Sql,Sql Server 2008 R2,Ranking,我正在寻找一种方法来选择排名靠前的重叠部分。表将如下所示: CODE START STOP RANK shift 2016-07-20 05:00 AM 2016-07-20 08:00 AM 5 late 2016-07-20 05:00 AM 2016-07-20 05:08 AM 1 break 2016-07-20 06:00 AM 2016-07-20 06:30 AM 2 这就是我希望我的输出:
CODE START STOP RANK
shift 2016-07-20 05:00 AM 2016-07-20 08:00 AM 5
late 2016-07-20 05:00 AM 2016-07-20 05:08 AM 1
break 2016-07-20 06:00 AM 2016-07-20 06:30 AM 2
这就是我希望我的输出:
CODE START STOP
late 2016-07-20 05:00 AM 2016-07-20 05:08 AM
shift 2016-07-20 05:08 AM 2016-07-20 06:00 AM
break 2016-07-20 06:00 AM 2016-07-20 06:30 AM
shift 2016-07-20 06:30 AM 2016-07-20 08:00 AM
所以我只想看看排名靠前的部分是怎么说这个人的状态的,但是如果他们除了标准的“轮班”部分没有其他状态,那么就表明他们在轮班
这有意义吗?请排除任何问题或提出的解决方案。此刻我似乎想不出什么。我可以选择排名靠前的部分,但不能选择重叠的部分
编辑:正如您在我的所需的输出中所看到的那样,从05:00 AM到05:08 AM,班次段被具有较高等级(较低的数字意味着较高的等级)的后期段覆盖,但从05:08 AM开始,因为没有区段覆盖它,我们从早上05:08返回到早上06:00的默认区段班次
然后,在06:00 AM和06:30 AM之间有一个计划的休息段,该段将再次覆盖轮班段。完成后,我们将返回默认的区段班次,班次结束时从上午6:30到上午8:00
我希望这是有意义的。是啊,一个SQL难题,我无法抗拒!:D 这里有一个可能的解决方案。我手头没有SQLServer(使用:),但SQL应该是可移植的:
create or replace table ranges(
code varchar,
beg timestamp_ntz,
end timestamp_ntz,
rank integer);
insert into ranges values
('shift', '2016-07-20 05:00:00', '2016-07-20 08:00:00', 5),
('late', '2016-07-20 05:00:00', '2016-07-20 05:00:08', 1),
('break', '2016-07-20 06:00:00', '2016-07-20 06:30:00', 2);
WITH PERIODS AS (
select beg, lead(beg, 1) over (order by beg) AS end
from (select beg from ranges union select end from ranges)
),
MATCHING_RANGES AS (
select periods.beg, periods.end, ranges.code, ranges.rank
from periods
join ranges on (periods.beg >= ranges.beg and periods.end <= ranges.end)
where periods.end is not null
),
RANKED_RANGES AS (
select beg, end, code, row_number() over (partition by beg order by rank) in_period_rank
from matching_ranges
)
select code, beg, end from ranked_ranges
where in_period_rank = 1
order by beg;
-------+---------------------+---------------------+
CODE | BEG | END |
-------+---------------------+---------------------+
late | 2016-07-20 05:00:00 | 2016-07-20 05:00:08 |
shift | 2016-07-20 05:00:08 | 2016-07-20 06:00:00 |
break | 2016-07-20 06:00:00 | 2016-07-20 06:30:00 |
shift | 2016-07-20 06:30:00 | 2016-07-20 08:00:00 |
-------+---------------------+---------------------+
---------------------+---------------------+-------+----------------+
BEG | END | CODE | IN_PERIOD_RANK |
---------------------+---------------------+-------+----------------+
2016-07-20 05:00:00 | 2016-07-20 05:00:08 | late | 1 |
2016-07-20 05:00:00 | 2016-07-20 05:00:08 | shift | 2 |
2016-07-20 05:00:08 | 2016-07-20 06:00:00 | shift | 1 |
2016-07-20 06:00:00 | 2016-07-20 06:30:00 | break | 1 |
2016-07-20 06:00:00 | 2016-07-20 06:30:00 | shift | 2 |
2016-07-20 06:30:00 | 2016-07-20 08:00:00 | shift | 1 |
---------------------+---------------------+-------+----------------+
听起来非常棒。。。我还没有机会在我的环境中测试它,但解决方案看起来非常合理和聪明。。。谢谢你抽出时间来试一试。我会测试它,如果一切正常,我会签署你的答案为好!:)
---------------------+---------------------+-------+------+
BEG | END | CODE | RANK |
---------------------+---------------------+-------+------+
2016-07-20 05:00:00 | 2016-07-20 05:00:08 | shift | 5 |
2016-07-20 05:00:00 | 2016-07-20 05:00:08 | late | 1 |
2016-07-20 05:00:08 | 2016-07-20 06:00:00 | shift | 5 |
2016-07-20 06:00:00 | 2016-07-20 06:30:00 | shift | 5 |
2016-07-20 06:00:00 | 2016-07-20 06:30:00 | break | 2 |
2016-07-20 06:30:00 | 2016-07-20 08:00:00 | shift | 5 |
---------------------+---------------------+-------+------+
---------------------+---------------------+-------+----------------+
BEG | END | CODE | IN_PERIOD_RANK |
---------------------+---------------------+-------+----------------+
2016-07-20 05:00:00 | 2016-07-20 05:00:08 | late | 1 |
2016-07-20 05:00:00 | 2016-07-20 05:00:08 | shift | 2 |
2016-07-20 05:00:08 | 2016-07-20 06:00:00 | shift | 1 |
2016-07-20 06:00:00 | 2016-07-20 06:30:00 | break | 1 |
2016-07-20 06:00:00 | 2016-07-20 06:30:00 | shift | 2 |
2016-07-20 06:30:00 | 2016-07-20 08:00:00 | shift | 1 |
---------------------+---------------------+-------+----------------+