我需要从成员资格表中提取和拆分数据。 我想分割范围以每年获取一行。
DateFrom 和 dateTo 可以是一年中的任何一天,但当日期被分割时,我们假设一行于 12 月 31 日结束,新行于 1 月 1 日开始
这是数据的外观
membershipId - groupId - ClientId - DateFrom - DateTo
2707 20008 1579 1997-01-01 00:00:00.000 1997-12-31 00:00:00.000
20989 20008 1579 1999-01-01 00:00:00.000 2004-12-31 00:00:00.000
39874 20298 1579 2005-01-01 00:00:00.000 2008-12-31 00:00:00.000
50295 21661 1579 2009-01-01 00:00:00.000 2009-12-31 00:00:00.000
50988 20399 1579 2010-01-01 00:00:00.000 2010-12-31 00:00:00.000
52378 21661 1579 2011-01-01 00:00:00.000 2013-12-31 00:00:00.000
57274 21660 1579 2014-01-01 00:00:00.000 3000-01-01 00:00:00.000
预期结果是:(每个范围分割)
2707 20008 1579 1997-01-01 00:00:00.000 1997-12-31 00:00:00.000
20989 20008 1579 1999-01-01 00:00:00.000 1999-12-31 00:00:00.000
20989 20008 1579 2000-01-01 00:00:00.000 2000-12-31 00:00:00.000
20989 20008 1579 2001-01-01 00:00:00.000 2001-12-31 00:00:00.000
20989 20008 1579 2002-01-01 00:00:00.000 2002-12-31 00:00:00.000
20989 20008 1579 2003-01-01 00:00:00.000 2003-12-31 00:00:00.000
20989 20008 1579 2004-01-01 00:00:00.000 2004-12-31 00:00:00.000
50295 21661 1579 2009-01-01 00:00:00.000 2009-12-31 00:00:00.000
50988 20399 1579 2010-01-01 00:00:00.000 2010-12-31 00:00:00.000
52378 21661 1579 2011-01-01 00:00:00.000 2011-12-31 00:00:00.000
52378 21661 1579 2012-01-01 00:00:00.000 2012-12-31 00:00:00.000
52378 21661 1579 2013-01-01 00:00:00.000 2013-12-31 00:00:00.000
57274 21660 1579 2014-01-01 00:00:00.000 3000-01-01 00:00:00.000
我尝试基于此使用递归 CTE: Possible recursive CTE query using date ranges 但我无法达到预期的结果。
我提出了这个查询:
WITH splitDates(startDate,endDate, newDate,client, groupingId ) as
(
SELECT m.datefrom as startDate, m.dateTo
, CASE
when year(m.dateFrom) <> year(m.dateto) then CAST(CAST(year(m.dateFrom) AS varchar) + '-' + CAST(12 AS varchar) + '-' + CAST(31 AS varchar) AS DATETIME)
else m.dateTo
end
, m.legalEntityId, m.groupingId
from adesse.dbo.membership m
UNION ALL
SELECT DATEADD(year, 1, startDate),
CAST(CAST(year(startDate)+1 AS varchar) + '-' + CAST(12 AS varchar) + '-' + CAST(31 AS varchar) AS DATETIME)
,CAST(CAST(year(startDate)+1 AS varchar) + '-' + CAST(12 AS varchar) + '- ' + CAST(31 AS varchar) AS DATETIME)
,client, groupingId
FROM splitDates
WHERE year(startDate) <> year(endDate)
)
SELECT *
FROM splitDates
where client = 1579
order by startDate
但是结果不完整:(
startDate endDate newDate client groupingId
1997-01-01 00:00:00.000 1997-12-31 00:00:00.000 1997-12-31 00:00:00.000 1579 20008
1999-01-01 00:00:00.000 2004-12-31 00:00:00.000 1999-12-31 00:00:00.000 1579 20008
2000-01-01 00:00:00.000 2000-12-31 00:00:00.000 2000-12-31 00:00:00.000 1579 20008
2005-01-01 00:00:00.000 2008-12-31 00:00:00.000 2005-12-31 00:00:00.000 1579 20298
2006-01-01 00:00:00.000 2006-12-31 00:00:00.000 2006-12-31 00:00:00.000 1579 20298
2009-01-01 00:00:00.000 2009-12-31 00:00:00.000 2009-12-31 00:00:00.000 1579 21661
2010-01-01 00:00:00.000 2010-12-31 00:00:00.000 2010-12-31 00:00:00.000 1579 20399
2011-01-01 00:00:00.000 2013-12-31 00:00:00.000 2011-12-31 00:00:00.000 1579 21661
2012-01-01 00:00:00.000 2012-12-31 00:00:00.000 2012-12-31 00:00:00.000 1579 21661
2014-01-01 00:00:00.000 3000-01-01 00:00:00.000 2014-12-31 00:00:00.000 1579 21660
2015-01-01 00:00:00.000 2015-12-31 00:00:00.000 2015-12-31 00:00:00.000 1579 21660
感谢帮助
最佳答案
我不确定您的最后日期是否为 3000-01-01,但这应该可行
CREATE TABLE members (membershipId INT, groupId INT, clientId INT, dateFrom DATETIME, dateTo DATETIME)
INSERT INTO members VALUES
(2707, 20008, 1579, '1997-01-01 00:00:00.000', '1997-12-31 00:00:00.000'),
(20989, 20008, 1579, '1999-01-01 00:00:00.000', '2004-12-31 00:00:00.000'),
(39874, 20298, 1579, '2005-01-01 00:00:00.000', '2008-12-31 00:00:00.000'),
(50295, 21661, 1579, '2009-01-01 00:00:00.000', '2009-12-31 00:00:00.000'),
(50988, 20399, 1579, '2010-01-01 00:00:00.000', '2010-12-31 00:00:00.000'),
(52378, 21661, 1579, '2011-01-01 00:00:00.000', '2013-12-31 00:00:00.000'),
(57274, 21660, 1579, '2014-01-01 00:00:00.000', '3000-01-01 00:00:00.000')
;
WITH cte AS
(
SELECT
membershipId,
groupId,
clientId,
dateFrom,
DATEADD(day, -1, DATEADD(YEAR,1,dateFrom)) newDateTo,
dateTo
FROM
members
UNION ALL
SELECT
m.membershipId,
m.groupId,
m.clientId,
DATEADD(YEAR,1,c.dateFrom),
DATEADD(day, -1, DATEADD(YEAR,2,c.dateFrom)),
c.dateto
FROM
members m
JOIN cte c ON c.membershipId = m.membershipId
AND DATEADD(YEAR,1,c.dateFrom) < m.dateTo
)
SELECT
membershipId,
groupId,
clientId,
dateFrom,
newDateTo dateTo
FROM
cte
ORDER BY
membershipId, dateFrom
OPTION (MAXRECURSION 0);
DROP TABLE members
关于sql-server - 递归 CTE 来分割日期范围,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32746039/