マージ不在期間

Question

私は、次のデータセットを持っている：

;with Data AS 
(
select '001' AS PERSONNUM,'2017-09-18 00:00:00.000' AS START,'2017-09-21 00:00:00.000' AS [END] 
UNION 
select '001','2017-09-22 00:00:00.000' AS START,'2017-09-22 00:00:00.000' AS [END] 
UNION 
select '002','2017-09-18 00:00:00.000' AS START,'2017-09-20 00:00:00.000' AS [END] 
UNION 
select '002','2017-09-22 00:00:00.000' AS START,'2017-09-22 00:00:00.000' AS [END] 
) 
select * from Data 

私はレコードをマージする必要が

場合、一部の従業員のための前の列から次の行とENDのコラムからSTART欄間の日数の差（ PERSONNUM）は1に等しい。私の例では、人物 '001'のレコードは、人物 '002'のためにマージする必要があります。

だから、期待される結果は次のようになります。

は、事前にありがとうございます！

Answer 1

基本的には[連続した日付の範囲を集約]（https://stackoverflow.comのItzik Ben-Gan's New Solution to the Packing Intervals Problem

IF OBJECT_ID('tempdb..#TestData', 'U') IS NOT NULL 
DROP TABLE #TestData; 

CREATE TABLE #TestData (
    PersonId CHAR(3), 
    BegDT DATETIME, 
    EndDT DATETIME 
    ); 
INSERT #TestData(PersonId, BegDT, EndDT) VALUES 
    (1, '20151231 08:00:00', '20151231 08:30:00'), 
    (1, '20151231 08:30:00', '20151231 09:00:00'), 
    (1, '20151231 09:00:00', '20151231 09:30:00'), 
    (1, '20151231 10:00:00', '20151231 11:00:00'), 
    (1, '20151231 10:30:00', '20151231 12:00:00'), 
    (1, '20151231 11:30:00', '20151231 12:30:00'), 
    (2, '20151231 08:00:00', '20151231 10:30:00'), 
    (2, '20151231 08:30:00', '20151231 10:00:00'), 
    (2, '20151231 09:00:00', '20151231 09:30:00'), 
    (2, '20151231 11:00:00', '20151231 11:30:00'), 
    (2, '20151231 11:32:00', '20151231 12:00:00'), 
    (2, '20151231 12:04:00', '20151231 12:30:00'), 
    (3, '20151231 08:00:00', '20151231 09:00:00'), 
    (3, '20151231 08:00:00', '20151231 08:30:00'), 
    (3, '20151231 08:30:00', '20151231 09:00:00'), 
    (3, '20151231 09:30:00', '20151231 09:30:00'); 

WITH 
    cte_MPE AS (
     SELECT 
      td.PersonId, td.BegDT, td.EndDT, 
      MaxPrevEnd = MAX(td.EndDT) OVER (PARTITION BY td.PersonId ORDER BY td.BegDT, td.EndDT ROWS BETWEEN UNBOUNDED PRECEDING AND 1 PRECEDING) 
     FROM 
      #TestData td 
     ), 
    cte_DivGroup AS (
     SELECT 
      m.PersonId, m.BegDT, m.EndDT, m.MaxPrevEnd, 
      DivGroup = SUM(x.NewBeg) OVER (PARTITION BY m.PersonId ORDER BY m.BegDT, m.EndDT ROWS UNBOUNDED PRECEDING) 
     FROM 
      cte_MPE m 
      CROSS APPLY (VALUES (IIF(m.BegDT <= m.MaxPrevEnd, NULL, 1))) x (NewBeg) 
     ) 
SELECT 
    dg.PersonId, 
    BegDT = MIN(dg.BegDT), 
    EndDT = MAX(dg.EndDT) 
FROM 
    cte_DivGroup dg 
GROUP BY 
    dg.PersonId, 
    dg.DivGroup 
ORDER BY 
    dg.PersonId; 

結果...

PersonId BegDT     EndDT 
-------- ----------------------- ----------------------- 
1  2015-12-31 08:00:00.000 2015-12-31 09:30:00.000 
1  2015-12-31 10:00:00.000 2015-12-31 12:30:00.000 
2  2015-12-31 08:00:00.000 2015-12-31 10:30:00.000 
2  2015-12-31 11:00:00.000 2015-12-31 11:30:00.000 
2  2015-12-31 11:32:00.000 2015-12-31 12:00:00.000 
2  2015-12-31 12:04:00.000 2015-12-31 12:30:00.000 
3  2015-12-31 08:00:00.000 2015-12-31 09:00:00.000 
3  2015-12-31 09:30:00.000 2015-12-31 09:30:00.000