我正在努力获得一个开始和结束日期组合，以便连续工作时间跨度。跨距可以跨越多行，其中第一行的结束日期与下一行的结束日期相同。预期结果是显示连续日期范围，以及该范围的工作小时数。
person startdate enddate hours
------ ----------------------- ----------------------- ------
5163 2013-04-29 07:00:00.000 2013-04-29 11:00:00.000 4.00
5163 2013-04-29 11:30:00.000 2013-04-29 15:30:00.000 4.00
5163 2013-04-29 15:30:00.000 2013-04-29 19:06:00.000 3.60
5851 2013-05-02 19:00:00.000 2013-05-02 23:00:00.000 4.00
5851 2013-05-02 23:00:00.000 2013-05-03 00:00:00.000 1.00
5851 2013-05-03 00:00:00.000 2013-05-03 00:31:00.000 0.52
根据以上数据，我想要以下内容。
person startdate enddate hours
------ ----------------------- ----------------------- ------
5163 2013-04-29 07:00:00.000 2013-04-29 11:00:00.000 4.00
5163 2013-04-29 11:30:00.000 2013-04-29 19:06:00.000 7.60
5851 2013-05-02 19:00:00.000 2013-05-03 00:31:00.000 5.52
对于每个人和新的（非连续）日期范围，将当前行的enddate与下一行的startdate进行比较。如果它们相同，则累积小时数并继续处理行，直到enddate / startdate不相等。
环境是SQL Server 2008 R2。我使用row_number和partition（）函数尝试了涉及自联接的查询，但是无法获得成功的解决方案。谢谢！
编辑：以下是RichardTheKiwi解决方案的数据流 - 我为一个人运行它，看看为一周的打击量产生了多少递归。
declare @startdate datetime;
set @startdate = '20130429';
declare @enddate datetime;
set @enddate = '20130506';
with tbl as (
select
PERSONNUM,
STARTDTM,
ENDDTM,
convert(decimal(10,2),1.0 * TIMEINSECONDS / 3600) as timeinhours
from vp_totals
where paycodetype = 'p'
and applydate >= @startdate and APPLYDATE < @enddate
and (paycodename like '%regular%'
or paycodename like '%overtime%'
or PAYCODENAME like '%double time%')
and (PAYCODENAME not like '%shift premium%')
and PERSONNUM = 'loh-5851'
)
select * from tbl order by startdtm -- 27 rows
PERSONNUM STARTDTM ENDDTM timeinhours
LOH-5851 2013-04-29 14:30:00 2013-04-29 18:30:00 4.0000
LOH-5851 2013-04-29 19:00:00 2013-04-29 23:00:00 4.0000
LOH-5851 2013-04-29 23:00:00 2013-04-30 00:00:00 1.0000
LOH-5851 2013-04-30 00:00:00 2013-04-30 00:11:00 0.1800
LOH-5851 2013-04-30 14:45:00 2013-04-30 18:45:00 4.0000
LOH-5851 2013-04-30 19:15:00 2013-04-30 23:00:00 3.7500
LOH-5851 2013-04-30 23:00:00 2013-04-30 23:15:00 0.2500
LOH-5851 2013-04-30 23:15:00 2013-05-01 00:00:00 0.7500
LOH-5851 2013-05-01 00:00:00 2013-05-01 00:11:00 0.1800
LOH-5851 2013-05-01 14:30:00 2013-05-01 18:30:00 4.0000
LOH-5851 2013-05-01 19:00:00 2013-05-01 23:00:00 4.0000
LOH-5851 2013-05-01 23:00:00 2013-05-02 00:00:00 1.0000
LOH-5851 2013-05-02 00:00:00 2013-05-02 00:22:00 0.3700
LOH-5851 2013-05-02 14:30:00 2013-05-02 18:30:00 4.0000
LOH-5851 2013-05-02 19:00:00 2013-05-02 23:00:00 4.0000
LOH-5851 2013-05-02 23:00:00 2013-05-03 00:00:00 1.0000
LOH-5851 2013-05-03 00:00:00 2013-05-03 00:31:00 0.5200
LOH-5851 2013-05-03 14:45:00 2013-05-03 17:45:00 3.0000
LOH-5851 2013-05-03 17:45:00 2013-05-03 18:45:00 1.0000
LOH-5851 2013-05-03 19:15:00 2013-05-03 23:00:00 3.7500
LOH-5851 2013-05-03 23:00:00 2013-05-03 23:15:00 0.2500
LOH-5851 2013-05-03 23:15:00 2013-05-04 00:00:00 0.7500
LOH-5851 2013-05-04 00:00:00 2013-05-04 00:15:00 0.2500
LOH-5851 2013-05-04 14:00:00 2013-05-04 18:00:00 4.0000
LOH-5851 2013-05-04 18:30:00 2013-05-04 22:30:00 4.0000
LOH-5851 2013-05-04 22:30:00 2013-05-04 23:00:00 0.5000
LOH-5851 2013-05-04 23:00:00 2013-05-04 23:30:00 0.5000
,cte as (
select personnum, startdtm, enddtm, timeinhours
from tbl
union all
select t.personnum, cte.startdtm, t.enddtm, cast(cte.timeinhours + t.timeinhours as decimal(10,2))
from cte
join tbl t on cte.personnum = t.personnum and cte.enddtm = t.startdtm
)
select * from cte order by startdtm, timeinhours option (maxrecursion 32000) -- 52 rows
personnum startdtm enddtm timeinhours
LOH-5851 2013-04-29 14:30:00 2013-04-29 18:30:00 4.0000
LOH-5851 2013-04-29 19:00:00 2013-04-29 23:00:00 4.0000
LOH-5851 2013-04-29 19:00:00 2013-04-30 00:00:00 5.0000
LOH-5851 2013-04-29 19:00:00 2013-04-30 00:11:00 5.1800
LOH-5851 2013-04-29 23:00:00 2013-04-30 00:00:00 1.0000
LOH-5851 2013-04-29 23:00:00 2013-04-30 00:11:00 1.1800
LOH-5851 2013-04-30 00:00:00 2013-04-30 00:11:00 0.1800
LOH-5851 2013-04-30 14:45:00 2013-04-30 18:45:00 4.0000
LOH-5851 2013-04-30 19:15:00 2013-04-30 23:00:00 3.7500
LOH-5851 2013-04-30 19:15:00 2013-04-30 23:15:00 4.0000
LOH-5851 2013-04-30 19:15:00 2013-05-01 00:00:00 4.7500
LOH-5851 2013-04-30 19:15:00 2013-05-01 00:11:00 4.9300
LOH-5851 2013-04-30 23:00:00 2013-04-30 23:15:00 0.2500
LOH-5851 2013-04-30 23:00:00 2013-05-01 00:00:00 1.0000
LOH-5851 2013-04-30 23:00:00 2013-05-01 00:11:00 1.1800
LOH-5851 2013-04-30 23:15:00 2013-05-01 00:00:00 0.7500
LOH-5851 2013-04-30 23:15:00 2013-05-01 00:11:00 0.9300
LOH-5851 2013-05-01 00:00:00 2013-05-01 00:11:00 0.1800
LOH-5851 2013-05-01 14:30:00 2013-05-01 18:30:00 4.0000
LOH-5851 2013-05-01 19:00:00 2013-05-01 23:00:00 4.0000
LOH-5851 2013-05-01 19:00:00 2013-05-02 00:00:00 5.0000
LOH-5851 2013-05-01 19:00:00 2013-05-02 00:22:00 5.3700
LOH-5851 2013-05-01 23:00:00 2013-05-02 00:00:00 1.0000
LOH-5851 2013-05-01 23:00:00 2013-05-02 00:22:00 1.3700
LOH-5851 2013-05-02 00:00:00 2013-05-02 00:22:00 0.3700
LOH-5851 2013-05-02 14:30:00 2013-05-02 18:30:00 4.0000
LOH-5851 2013-05-02 19:00:00 2013-05-02 23:00:00 4.0000
LOH-5851 2013-05-02 19:00:00 2013-05-03 00:00:00 5.0000
LOH-5851 2013-05-02 19:00:00 2013-05-03 00:31:00 5.5200
LOH-5851 2013-05-02 23:00:00 2013-05-03 00:00:00 1.0000
LOH-5851 2013-05-02 23:00:00 2013-05-03 00:31:00 1.5200
LOH-5851 2013-05-03 00:00:00 2013-05-03 00:31:00 0.5200
LOH-5851 2013-05-03 14:45:00 2013-05-03 17:45:00 3.0000
LOH-5851 2013-05-03 14:45:00 2013-05-03 18:45:00 4.0000
LOH-5851 2013-05-03 17:45:00 2013-05-03 18:45:00 1.0000
LOH-5851 2013-05-03 19:15:00 2013-05-03 23:00:00 3.7500
LOH-5851 2013-05-03 19:15:00 2013-05-03 23:15:00 4.0000
LOH-5851 2013-05-03 19:15:00 2013-05-04 00:00:00 4.7500
LOH-5851 2013-05-03 19:15:00 2013-05-04 00:15:00 5.0000
LOH-5851 2013-05-03 23:00:00 2013-05-03 23:15:00 0.2500
LOH-5851 2013-05-03 23:00:00 2013-05-04 00:00:00 1.0000
LOH-5851 2013-05-03 23:00:00 2013-05-04 00:15:00 1.2500
LOH-5851 2013-05-03 23:15:00 2013-05-04 00:00:00 0.7500
LOH-5851 2013-05-03 23:15:00 2013-05-04 00:15:00 1.0000
LOH-5851 2013-05-04 00:00:00 2013-05-04 00:15:00 0.2500
LOH-5851 2013-05-04 14:00:00 2013-05-04 18:00:00 4.0000
LOH-5851 2013-05-04 18:30:00 2013-05-04 22:30:00 4.0000
LOH-5851 2013-05-04 18:30:00 2013-05-04 23:00:00 4.5000
LOH-5851 2013-05-04 18:30:00 2013-05-04 23:30:00 5.0000
LOH-5851 2013-05-04 22:30:00 2013-05-04 23:00:00 0.5000
LOH-5851 2013-05-04 22:30:00 2013-05-04 23:30:00 1.0000
LOH-5851 2013-05-04 23:00:00 2013-05-04 23:30:00 0.5000
,cte2 as (
select *, rn = row_number() over (partition by personnum, enddtm order by startdtm)
from cte
)
select * from cte2 order by startdtm, rn -- 52 rows
personnum startdtm enddtm timeinhours rn
LOH-5851 2013-04-29 14:30:00 2013-04-29 18:30:00 4.0000 1
LOH-5851 2013-04-29 19:00:00 2013-04-29 23:00:00 4.0000 1
LOH-5851 2013-04-29 19:00:00 2013-04-30 00:00:00 5.0000 1
LOH-5851 2013-04-29 19:00:00 2013-04-30 00:11:00 5.1800 1
LOH-5851 2013-04-29 23:00:00 2013-04-30 00:11:00 1.1800 2
LOH-5851 2013-04-29 23:00:00 2013-04-30 00:00:00 1.0000 2
LOH-5851 2013-04-30 00:00:00 2013-04-30 00:11:00 0.1800 3
LOH-5851 2013-04-30 14:45:00 2013-04-30 18:45:00 4.0000 1
LOH-5851 2013-04-30 19:15:00 2013-04-30 23:00:00 3.7500 1
LOH-5851 2013-04-30 19:15:00 2013-04-30 23:15:00 4.0000 1
LOH-5851 2013-04-30 19:15:00 2013-05-01 00:11:00 4.9300 1
LOH-5851 2013-04-30 19:15:00 2013-05-01 00:00:00 4.7500 1
LOH-5851 2013-04-30 23:00:00 2013-05-01 00:00:00 1.0000 2
LOH-5851 2013-04-30 23:00:00 2013-05-01 00:11:00 1.1800 2
LOH-5851 2013-04-30 23:00:00 2013-04-30 23:15:00 0.2500 2
LOH-5851 2013-04-30 23:15:00 2013-05-01 00:11:00 0.9300 3
LOH-5851 2013-04-30 23:15:00 2013-05-01 00:00:00 0.7500 3
LOH-5851 2013-05-01 00:00:00 2013-05-01 00:11:00 0.1800 4
LOH-5851 2013-05-01 14:30:00 2013-05-01 18:30:00 4.0000 1
LOH-5851 2013-05-01 19:00:00 2013-05-01 23:00:00 4.0000 1
LOH-5851 2013-05-01 19:00:00 2013-05-02 00:00:00 5.0000 1
LOH-5851 2013-05-01 19:00:00 2013-05-02 00:22:00 5.3700 1
LOH-5851 2013-05-01 23:00:00 2013-05-02 00:22:00 1.3700 2
LOH-5851 2013-05-01 23:00:00 2013-05-02 00:00:00 1.0000 2
LOH-5851 2013-05-02 00:00:00 2013-05-02 00:22:00 0.3700 3
LOH-5851 2013-05-02 14:30:00 2013-05-02 18:30:00 4.0000 1
LOH-5851 2013-05-02 19:00:00 2013-05-02 23:00:00 4.0000 1
LOH-5851 2013-05-02 19:00:00 2013-05-03 00:00:00 5.0000 1
LOH-5851 2013-05-02 19:00:00 2013-05-03 00:31:00 5.5200 1
LOH-5851 2013-05-02 23:00:00 2013-05-03 00:31:00 1.5200 2
LOH-5851 2013-05-02 23:00:00 2013-05-03 00:00:00 1.0000 2
LOH-5851 2013-05-03 00:00:00 2013-05-03 00:31:00 0.5200 3
LOH-5851 2013-05-03 14:45:00 2013-05-03 17:45:00 3.0000 1
LOH-5851 2013-05-03 14:45:00 2013-05-03 18:45:00 4.0000 1
LOH-5851 2013-05-03 17:45:00 2013-05-03 18:45:00 1.0000 2
LOH-5851 2013-05-03 19:15:00 2013-05-03 23:00:00 3.7500 1
LOH-5851 2013-05-03 19:15:00 2013-05-03 23:15:00 4.0000 1
LOH-5851 2013-05-03 19:15:00 2013-05-04 00:00:00 4.7500 1
LOH-5851 2013-05-03 19:15:00 2013-05-04 00:15:00 5.0000 1
LOH-5851 2013-05-03 23:00:00 2013-05-04 00:15:00 1.2500 2
LOH-5851 2013-05-03 23:00:00 2013-05-04 00:00:00 1.0000 2
LOH-5851 2013-05-03 23:00:00 2013-05-03 23:15:00 0.2500 2
LOH-5851 2013-05-03 23:15:00 2013-05-04 00:00:00 0.7500 3
LOH-5851 2013-05-03 23:15:00 2013-05-04 00:15:00 1.0000 3
LOH-5851 2013-05-04 00:00:00 2013-05-04 00:15:00 0.2500 4
LOH-5851 2013-05-04 14:00:00 2013-05-04 18:00:00 4.0000 1
LOH-5851 2013-05-04 18:30:00 2013-05-04 22:30:00 4.0000 1
LOH-5851 2013-05-04 18:30:00 2013-05-04 23:00:00 4.5000 1
LOH-5851 2013-05-04 18:30:00 2013-05-04 23:30:00 5.0000 1
LOH-5851 2013-05-04 22:30:00 2013-05-04 23:30:00 1.0000 2
LOH-5851 2013-05-04 22:30:00 2013-05-04 23:00:00 0.5000 2
LOH-5851 2013-05-04 23:00:00 2013-05-04 23:30:00 0.5000 3
select personnum, startdtm, max(enddtm) enddtm, max(timeinhours) timeinhours
from cte2
where rn=1
group by personnum, startdtm
order by personnum, startdtm
option (maxrecursion 32000) -- 12 rows
personnum startdtm enddtm timeinhours
LOH-5851 2013-04-29 14:30:00 2013-04-29 18:30:00 4.0000
LOH-5851 2013-04-29 19:00:00 2013-04-30 00:11:00 5.1800
LOH-5851 2013-04-30 14:45:00 2013-04-30 18:45:00 4.0000
LOH-5851 2013-04-30 19:15:00 2013-05-01 00:11:00 4.9300
LOH-5851 2013-05-01 14:30:00 2013-05-01 18:30:00 4.0000
LOH-5851 2013-05-01 19:00:00 2013-05-02 00:22:00 5.3700
LOH-5851 2013-05-02 14:30:00 2013-05-02 18:30:00 4.0000
LOH-5851 2013-05-02 19:00:00 2013-05-03 00:31:00 5.5200
LOH-5851 2013-05-03 14:45:00 2013-05-03 18:45:00 4.0000
LOH-5851 2013-05-03 19:15:00 2013-05-04 00:15:00 5.0000
LOH-5851 2013-05-04 14:00:00 2013-05-04 18:00:00 4.0000
LOH-5851 2013-05-04 18:30:00 2013-05-04 23:30:00 5.0000
该查询适用于少量数据，但在为付费期（通常为一周）的预期员工人口运行时，会出现丑陋的最大递归错误消息。
编辑编辑：查看Richard针对递归问题修复的注释。
答案 0 :(得分：5)
示例数据
create table tbl (person int, startdate datetime, enddate datetime, hours decimal(10,2));
insert tbl values
(5163 ,'2013-04-29 07:00:00.000' ,'2013-04-29 11:00:00.000', 4.00),
(5163 ,'2013-04-29 11:30:00.000' ,'2013-04-29 15:30:00.000', 4.00),
(5163 ,'2013-04-29 15:30:00.000' ,'2013-04-29 19:06:00.000', 3.60),
(5851 ,'2013-05-02 19:00:00.000' ,'2013-05-02 23:00:00.000', 4.00),
(5851 ,'2013-05-02 23:00:00.000' ,'2013-05-03 00:00:00.000', 1.00),
(5851 ,'2013-05-03 00:00:00.000' ,'2013-05-03 00:31:00.000', 0.52);
查询
;with cte as (
select person, startdate, enddate, hours
from tbl
union all
select t.person, cte.startdate, t.enddate, cast(cte.hours + t.hours as decimal(10,2))
from cte
join tbl t on cte.person = t.person and cte.enddate = t.startdate
), cte2 as (
select *, rn = row_number() over (partition by person, enddate order by startdate)
from cte
)
select person, startdate, max(enddate) enddate, max(hours) hours
from cte2
where rn=1
group by person, startdate
order by person, startdate;
结果
person startdate enddate hours
----------- ----------------------- ----------------------- -------
5163 2013-04-29 07:00:00.000 2013-04-29 11:00:00.000 4.00
5163 2013-04-29 11:30:00.000 2013-04-29 19:06:00.000 7.60
5851 2013-05-02 19:00:00.000 2013-05-03 00:31:00.000 5.52