Sql server SQL Server-按给定日期拆分日期范围

我有一个表，它存储一个Id和一个有效期，指示它何时处于活动状态

PortfolioId StartDate                 EndDate
1           2018-01-01 00:00:00.000   2018-05-31 00:00:00.000
2           2017-01-01 00:00:00.000   2018-05-31 00:00:00.000

我有另一个表，它存储了与上述Id相关的组件，并且也有一个有效期。对于表1中的任何给定条目，表2可以有更多的条目

PortfolioComponentId    PortfolioId SplitDate
1                       1           2018-02-28 00:00:00.000
2                       1           2018-03-31 00:00:00.000

3                       2           2017-03-31 00:00:00.000
4                       2           2017-09-20 00:00:00.000
5                       2           2018-01-15 00:00:00.000

我有一段时间运行查询 i、 e

我一直在寻找下面这样的结果，其中表1中的数据是基于表2中的数据进行分割的

PortfolioId StartDate                 EndDate
1           2018-01-01 00:00:00.000   2018-02-28 00:00:00.000
1           2018-03-01 00:00:00.000   2018-03-31 00:00:00.000 - Starts from End date + 1 from the prev row
1           2018-04-01 00:00:00.000   2018-05-15 00:00:00.000

2           2017-06-30 00:00:00.000   2017-09-20 00:00:00.000 - Starts from Seach date [Portfolio component Id 3 ignored as it falls outside of search date range]
2           2017-09-21 00:00:00.000   2018-01-15 00:00:00.000
2           2018-01-16 00:00:00.000   2018-05-15 00:00:00.000 - Ends by seach end date

数据设置-如果有帮助

我相信我已经得到了接近我想要的结果，尽管不是

最理想的方法

从性能角度看的最佳方法

DECLARE@Temp表（BenchmarkDate-Datetime、ComponentType-int、PortfolioId-int）

插入到@Temp中 从@Portfolio中选择StartDate、1、PortfolioId 联合 从@Portfolio中选择EndDate，2，PortfolioId

插入到@Temp中 从@PortfolioComponents中选择SplitDate，2，PortfolioId 联合 从@PortfolioComponents中选择SplitDate+1，1，PortfolioId

声明@Results表 ( Id INT标识（1,1）， 开始日期时间， EndDate日期时间， 叶状体 )

插入@Results 选择rset1.BenchmarkDate[Startdate]， （选择最小值（rset2.基准日期） 来自@Temp rset2 其中rset2.ComponentType=2 和rset2.BenchmarkDate>rset1.BenchmarkDate 和rset1.PortfolioId=rset2.PortfolioId）[Enddate]， rset1.叶状体 来自@Temp rset1

其中rset1.ComponentType=1 按rset1.PortfolioId、rset1.BenchmarkDate排序

挑选 当（@SearchStartDate介于StartDate和EndDate之间）然后@SearchStartDate ELSE StartDate END StartDate， 当（@SearchEndDate介于StartDate和EndDate之间）然后@SearchEndDate ELSE EndDate EndDate EndDate， 叶状体， ( 选择PortfolioComponentId 来自@PortfolioComponents pc 哪里 （pc.PortfolioID=r.PortfolioID和 （日期添加（d，1，pc.SplitDate）=r.StartDate） )PortfolioComponent 来自@Results r 哪里 （@SearchStartDateEndDate） 或 （@SearchEndDate介于StartDate和EndDate之间） 或 （@SearchStartDate介于StartDate和EndDate之间）

PortfolioId StartDate                 EndDate
1           2018-01-01 00:00:00.000   2018-02-28 00:00:00.000
1           2018-03-01 00:00:00.000   2018-03-31 00:00:00.000 - Starts from End date + 1 from the prev row
1           2018-04-01 00:00:00.000   2018-05-15 00:00:00.000

2           2017-06-30 00:00:00.000   2017-09-20 00:00:00.000 - Starts from Seach date [Portfolio component Id 3 ignored as it falls outside of search date range]
2           2017-09-21 00:00:00.000   2018-01-15 00:00:00.000
2           2018-01-16 00:00:00.000   2018-05-15 00:00:00.000 - Ends by seach end date

DECLARE @SearchStartDate DATETIME = '30-JUN-2017'
DECLARE @SearchEndDate DATETIME = '15-MAY-2018'

DECLARE @Portfolio TABLE
(
    PortfolioId INT PRIMARY KEY IDENTITY(1,1),
    StartDate DATETIME,
    EndDate DATETIME
)

INSERT INTO @Portfolio
SELECT '01-JAN-2018',  '31-MAY-2018'
INSERT INTO @Portfolio
SELECT '01-JAN-2017',  '31-MAY-2018'


DECLARE @PortfolioComponents TABLE
(
    PortfolioComponentId INT PRIMARY KEY IDENTITY(1,1),
    PortfolioId INT, 
    SplitDate DATETIME
)
INSERT INTO @PortfolioComponents
SELECT 1, '28-FEB-2018'
INSERT INTO @PortfolioComponents
SELECT 1, '31-MAR-2018'

INSERT INTO @PortfolioComponents
SELECT 2, '31-MAR-2017'
INSERT INTO @PortfolioComponents
SELECT 2, '20-SEP-2017'
INSERT INTO @PortfolioComponents
SELECT 2, '15-JAN-2018'


SELECT * from @Portfolio
SELECT * from @PortfolioComponents

DECLARE @Temp TABLE (BenchmarkDate Datetime, ComponentType int, PortfolioId INT)

INSERT INTO @Temp SELECT StartDate , 1, PortfolioId FROM @Portfolio UNION SELECT EndDate , 2, PortfolioId FROM @Portfolio

INSERT INTO @Temp SELECT SplitDate , 2, PortfolioId FROM @PortfolioComponents UNION SELECT SplitDate + 1 , 1, PortfolioId FROM @PortfolioComponents

DECLARE @Results TABLE ( Id INT IDENTITY(1,1), StartDate DATETIME, EndDate DATETIME, PortfolioId INT )

INSERT INTO @Results SELECT rset1.BenchmarkDate [Startdate], ( SELECT MIN(rset2.BenchmarkDate) FROM @Temp rset2 WHERE rset2.ComponentType = 2 AND rset2.BenchmarkDate > rset1.BenchmarkDate AND rset1.PortfolioId = rset2.PortfolioId) [Enddate], rset1.PortfolioId FROM @Temp rset1

WHERE rset1.ComponentType = 1 ORDER BY rset1.PortfolioId, rset1.BenchmarkDate

SELECT CASE WHEN (@SearchStartDate BETWEEN StartDate AND EndDate ) THEN @SearchStartDate ELSE StartDate END StartDate, CASE WHEN (@SearchEndDate BETWEEN StartDate AND EndDate) THEN @SearchEndDate ELSE EndDate END EndDate, PortfolioId , ( SELECT PortfolioComponentId FROM @PortfolioComponents pc WHERE (pc.PortfolioID = r.PortfolioId AND (DATEADD(d, 1, pc.SplitDate) = r.StartDate )) ) PortfolioComponentId FROM @Results r WHERE (@SearchStartDate < StartDate AND @SearchStartDate < EndDate AND @SearchEndDate > EndDate) OR (@SearchEndDate BETWEEN StartDate AND EndDate) OR (@SearchStartDate BETWEEN StartDate AND EndDate )