我目前在SQL中有一个结果表，显示一个人的地址在哪个时间段（大学学期）发生了变化这并不是每个时间段都会发生，因此有些行显示为无效，我预计需要这些更新（＆＃34;填写＆＃34;）每个后续时间段，直到输入新的地址更改
我包含了这两个ID，因为它们代表了我所看到的两种可能情况：
-ID 1234应填写前面的条款与序列1县（如此处所示）
-ID 5678应该根据以前加入的表格填写前面的条款和序列1县（在这种情况下为CLAY）
目前，我正在展示以下内容：
ID TERM COUNTY SEQUENCE
------------------------------------------
1234 201308 null null
1234 201401 null null
1234 201408 ORANGE 1
1234 201501 null null
1234 201505 null null
1234 201508 OSCEOLA 3
1234 201601 null null
5678 201301 null null
5678 201305 null null
5678 201308 ST JOHNS 3
5678 201401 null null
5678 201405 null null
5678 201408 null null
5678 201501 null null
5678 201505 DUVAL 4
我需要输出看起来像：
ID TERM COUNTY SEQUENCE
---------------------------------------------
1234 201308 ORANGE null
1234 201401 ORANGE null
1234 201408 ORANGE 1
1234 201501 ORANGE null
1234 201505 ORANGE null
1234 201508 OSCEOLA 3
1234 201601 OSCEOLA null
5678 201301 CLAY null
5678 201305 CLAY null
5678 201308 ST JOHNS 3
5678 201401 ST JOHNS null
5678 201405 ST JOHNS null
5678 201408 ST JOHNS null
5678 201501 ST JOHNS null
5678 201505 DUVAL 4
这是我第一次遇到像这样的更新条款需要，所以您可以提供的任何见解将不胜感激！
*我不确定以前的代码中有多少是相关的，但这里基本上是输入最终输出的临时表代码（＆＃34; PIDM＆＃34;是ID）：
DROP TABLE #ADDRESS_PT_1--, #ADDRESS_PT_2
GO
SELECT SPRADDR_PIDM 'PIDM', Y.TERM, SPRADDR_SEQNO 'SEQNO', SPRADDR_STAT_CODE 'STATE', SPRADDR_CNTY_CODE 'CNTY',
BANNR_TERM = CASE
WHEN Y2.TERM IS NULL THEN Y.TERM
ELSE Y2.TERM
END
INTO #ADDRESS_PT_1
FROM SPRADDR
LEFT OUTER JOIN RCACYR Y2
ON (SPRADDR_ACTIVITY_DATE BETWEEN Y2.BEGIN_DATE AND Y2.END_DATE
AND SUBSTRING(Y2.TERM,5,2) IN ('50','80','10')),
RCACYR Y
WHERE SPRADDR_ACTIVITY_DATE BETWEEN Y.BEGIN_DATE AND Y.END_DATE
AND SUBSTRING(Y.TERM,5,2) IN ('05','08','01')
AND SPRADDR_ATYP_CODE = 'MA'
ORDER BY SPRADDR_PIDM, SPRADDR_SEQNO
GO
/* Get the individuals addresses for each term */
SELECT *
--INTO #ADDRESS_PT_2
FROM #ADDRESS_PT_1 X
LEFT JOIN RCCNTY C
ON C.COUNTY = X.CNTY
WHERE X.SEQNO = (SELECT MAX(A.SEQNO)
FROM #ADDRESS_PT_1 A
WHERE X.PIDM = A.PIDM
AND X.TERM = A.TERM)
--AND X.PIDM = 5678
ORDER BY X.PIDM, X.SEQNO
GO
这个输出是：
PIDM TERM SEQNO STATE CNTY BANNR_TERM COUNTY COUNTY_TITLE COUNTY_REGION COUNTY_REGION_TITLE
5678 201108 1 FL CLAY 201108 CLAY CLAY 2 Northeast Florida
5678 201308 3 FL ST J 201308 ST J ST. JOHNS 2 Northeast Florida
5678 201505 5 FL DUVA 201550 DUVA DUVAL 2 Duval County
答案 0 :(得分：1)
我在CTE中提供了您提供的样本。然后我外部应用（p）上一行，其中NOT NULL COUNTY，另一个外部应用，获取每个[SEQUENCE] = 1 ID的行。在最后的OUTER APPLY中使用表{（1}}）而不是FROM cte，而FROM SPRADDR行可能不在CTE中。
[SEQUENCE] = 1会给你：
;WITH cte AS (
SELECT *
FROM (VALUES
(1234, 201308, null, null),
(1234, 201401, null, null),
(1234, 201408, 'ORANGE', 1),
(1234, 201501, null, null),
(1234, 201505, null, null),
(1234, 201508, 'OSCEOLA', 3),
(1234, 201601, null, null),
(5678, 201301, null, null),
(5678, 201305, null, null),
(5678, 201308, 'ST JOHNS', 3),
(5678, 201401, null, null),
(5678, 201405, null, null),
(5678, 201408, null, null),
(5678, 201501, null, null),
(5678, 201505, 'DUVAL', 4)
) as t(ID, TERM, COUNTY, [SEQUENCE])
)
SELECT c.ID,
c.TERM,
COALESCE(c.COUNTY,p.COUNTY,p1.COUNTY) as COUNTY,
c.[SEQUENCE]
FROM cte c
OUTER APPLY (
SELECT TOP 1 COUNTY
FROM cte
WHERE ID = c.ID
AND TERM < c.TERM
AND COUNTY IS NOT NULL
ORDER BY TERM DESC) as p
OUTER APPLY (
SELECT TOP 1 COUNTY
FROM cte
WHERE ID = c.ID
AND [SEQUENCE] = 1
ORDER BY TERM DESC) as p1
答案 1 :(得分：0)
查看示例：
SELECT * into tbl_filltest FROM (
VALUES (1,Null),(2,Null),(3,5),(4,Null),(5,Null),(6,Null),(7,4),(8,Null),9,Null),(10,1)
) as t(c1,c2)
GO
SELECT * FROM tbl_filltest
GO
;WITH GoodValues as (SELECT * FROM tbl_filltest WHERE c2 is not null),
NullValues as (SELECT * FROM tbl_filltest WHERE c2 is null)
UPDATE n SET c2 = g1.c2 FROM GoodValues as g1
OUTER APPLY (SELECT MAX(c1) as Min_c1 FROM GoodValues as i WHERE g1.c1 > i.c1) as g2
INNER JOIN NullValues as n
ON n.c1 > IsNull(g2.Min_c1,0) and n.c1 < g1.c1
GO
SELECT * FROM tbl_filltest
GO