我在下面的桶填充查询中找到了，但是我想将其从使用单个填充值扩展到能够使用填充表。请查看带有示例数据的查询，我希望能够加入我的填充表和递归工作，目前我正在从填充器中选择单个项目。
请查看此主题以获取此问题的完整上下文。 http://www.sqlservercentral.com/Forums/Topic568498-338-1.aspx
谢谢。
DECLARE @Buckets TABLE
(
bucketID INT ,
FullCapacity INT ,
currentamount INT
);
DECLARE @Filler TABLE ( ID INT, Filler INT );
INSERT INTO @Buckets
VALUES ( '1', 85, 0 ) ,
( '2', 80, 0 ) ,
( '3', 75, 0 ) ,
( '4', 70, 0 ) ,
( '5', 50, 0 ) ,
( '6', 40, 0 );
INSERT INTO @Filler
VALUES ( '1', 90 ) ,
( '2', 40 ) ,
( '3', 70 ) ,
( '4', 50 ) ,
( '5', 40 ) ,
( '6', 30 ) ,
( '7', 35 );
DECLARE @AmountToAllocate INT = ( SELECT TOP 1
Filler
FROM @Filler
);
--single filler amount
;WITH Calculator
AS ( SELECT bucketID ,
FullCapacity ,
currentamount ,
AmountLeftToAllocate = CASE WHEN @AmountToAllocate > ( FullCapacity
- currentamount )
THEN @AmountToAllocate
- ( FullCapacity
- currentamount )
WHEN @AmountToAllocate < 0
AND ABS(@AmountToAllocate) > currentamount
THEN currentamount
+ @AmountToAllocate
ELSE 0
END ,
NewAmount = CASE WHEN @AmountToAllocate > ( FullCapacity
- currentamount )
THEN FullCapacity
WHEN @AmountToAllocate < 0
AND ABS(@AmountToAllocate) > currentamount
THEN 0
ELSE currentamount
+ @AmountToAllocate
END
FROM @Buckets
WHERE bucketID = 1
UNION ALL
SELECT tr.bucketID ,
tr.FullCapacity ,
tr.currentamount ,
AmountLeftToAllocate = CASE WHEN lr.AmountLeftToAllocate > ( tr.FullCapacity
- tr.currentamount )
THEN lr.AmountLeftToAllocate
- ( tr.FullCapacity
- tr.currentamount )
WHEN lr.AmountLeftToAllocate < 0
AND ABS(lr.AmountLeftToAllocate) > tr.currentamount
THEN tr.currentamount
+ lr.AmountLeftToAllocate
ELSE 0
END ,
NewAmount = CASE WHEN lr.AmountLeftToAllocate > ( tr.FullCapacity
- tr.currentamount )
THEN tr.FullCapacity
WHEN lr.AmountLeftToAllocate < 0
AND ABS(lr.AmountLeftToAllocate) > tr.currentamount
THEN 0
ELSE tr.currentamount
+ lr.AmountLeftToAllocate
END
FROM @Buckets tr
INNER JOIN Calculator lr ON lr.bucketID + 1 = tr.bucketID
)
SELECT bucketID ,
FullCapacity ,
Amount = NewAmount ,
OldAmount = currentamount
FROM Calculator;
答案 0 :(得分：0)
在SQL 2012中，但仍尝试在SQL 2008中找到解决方案。
DROP TABLE #Buckets
CREATE TABLE #Buckets (bucketID INT, FullCapacity INT, CurrentAmount INT);
INSERT INTO #Buckets
VALUES ( '1', 85, 0 ) ,
( '2', 80, 0 ) ,
( '3', 75, 0 ) ,
( '4', 70, 0 ) ,
( '5', 50, 0 ) ,
( '6', 40, 0 );
DROP TABLE #Filler
CREATE TABLE #Filler (FillerID INT, Filler INT);
INSERT INTO #Filler
VALUES ( '1', 90 ) ,
( '2', 40 ) ,
( '3', 70 ) ,
( '4', 50 ) ,
( '5', 40 ) ,
( '6', 30 ) ,
( '7', 35 );
WITH ProcessedDebits AS (
SELECT bucketID, FullCapacity, [from] = ([to] - FullCapacity), [to]
FROM (SELECT *, [to] = SUM(FullCapacity) OVER (PARTITION BY 1 ORDER BY bucketID
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) FROM #Buckets) d
),
ProcessedCredits AS (
SELECT FillerID, Filler, [from] = ([to] - Filler), [to]
FROM (SELECT *, [to] = SUM(Filler) OVER (PARTITION BY 1 ORDER BY FillerID
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) FROM #Filler) d
)
SELECT
bucketID, FullCapacity,
DebitBalance = CASE
WHEN dr.[to] >= cr.[to] THEN (dr.[to] - cr.[to])
WHEN dr.[to] < cr.[to] THEN 0
ELSE dr.[to] - MAX(cr.[to]) OVER(PARTITION BY 1 ORDER BY dr.bucketID
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)
END,
FillerID, Filler,
CreditBalance = CASE
WHEN cr.[to] >= dr.[to] THEN (cr.[to] - dr.[to])
WHEN cr.[to] < dr.[to] THEN 0
ELSE cr.[to] - MAX(dr.[to]) OVER(PARTITION BY 1 ORDER BY cr.FillerID
ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW)
END
FROM ProcessedDebits dr
FULL OUTER JOIN ProcessedCredits cr
ON cr.[from] < dr.[to]
AND cr.[to] > dr.[from]
ORDER BY bucketID, FillerID
OPTION (MAXDOP 1);