我正在尝试填充此数据以构建按产品类型划分的每小时输出。基本上每行3种类型的产品都可以运行。它可以每小时改变4次，但有时一种产品全天运行。
Line Product Hour ProductStopped TimeStamp HourCount
1 A 7 2014-01-28 07:56:30.000 2014-01-28 07:52:47.000 222
1 A 7 2014-01-28 07:56:30.000 2014-01-28 07:53:52.000 225
1 A 7 2014-01-28 07:56:30.000 2014-01-28 07:54:57.000 297
1 B 7 2014-01-28 08:05:20.000 2014-01-28 07:54:57.000 297
1 A 7 2014-01-28 07:56:30.000 2014-01-28 07:55:59.000 321
1 B 7 2014-01-28 08:05:20.000 2014-01-28 07:55:59.000 321
1 B 7 2014-01-28 08:05:20.000 2014-01-28 07:57:02.000 332
1 B 7 2014-01-28 08:05:20.000 2014-01-28 07:58:08.000 364
1 B 7 2014-01-28 08:05:20.000 2014-01-28 07:59:14.000 420
1 B 8 2014-01-28 08:05:20.000 2014-01-28 08:00:16.000 456
1 B 8 2014-01-28 08:05:20.000 2014-01-28 08:01:19.000 489
1 B 8 2014-01-28 08:05:20.000 2014-01-28 08:02:22.000 523
1 B 8 2014-01-28 08:05:20.000 2014-01-28 08:03:25.000 589
1 A 8 NULL 2014-01-28 08:03:25.000 589
1 B 8 2014-01-28 08:05:20.000 2014-01-28 08:04:30.000 634
1 A 8 NULL 2014-01-28 08:04:30.000 634
1 B 8 2014-01-28 08:05:20.000 2014-01-28 08:05:35.000 678
1 A 8 NULL 2014-01-28 08:05:35.000 678
1 A 8 NULL 2014-01-28 08:06:39.000 720
1 A 8 NULL 2014-01-28 08:07:45.000 745
HourCount是从班次开始（早上7点）产生的部件数量，将计算到班次结束时（晚上7点）。如果产品从A更改为B，则HourCount仍然继续，因为它与产品无关，而与机器无关。我想知道每个产品在一小时内生产了多少。 我希望这张表看起来像这样：
Line Product Hour Quantity
1 A 7 321
1 B 7 78
1 C 7 0 (or without this row if is 0 for the product)
1 A 8 56
1 B 8 346
........
2 A 7 533
2 B 7 43
....
我添加了新的ProductStopped列，其中记录了产品停止输出时的日期和时间，不幸的是，我无法在启动时添加，因为这将解决我的所有问题:) 我稍微修改了@OGHaza解决方案，给了我几乎正确的值，我现在遇到的问题是当ProductStopped为NULL（仍在运行）时。
WITH cte AS (
SELECT t1.*
,CASE WHEN t1.Stop >
(SELECT top 1 Stop
FROM t t2
WHERE t1.TimeStamp = t2.TimeStamp
AND t1.LineID = t2.LineID
AND t1.Hour = t2.Hour
AND t1.Product <> t2.Product
AND t1.HourCount = t2.HourCount
ORDER BY TimeStamp
)
OR t1.Stop IS NULL
THEN 0
ELSE 1
END AS InProduction
FROM t t1
)
SELECT LineID
,Product
,Hour
,SUM(CASE WHEN PrevInProduction = 1
THEN HourCount - PrevCount
ELSE 0
END) AS Units
FROM (SELECT t1.*
,(SELECT top 1 InProduction
FROM cte t2
WHERE t2.TimeStamp < t1.TimeStamp
AND t1.Product = t2.Product
AND t1.LineID = t2.LineID
ORDER BY TimeStamp DESC
) AS PrevInProduction
,(SELECT top 1 HourCount
FROM cte t2
WHERE t2.TimeStamp < t1.TimeStamp
AND t1.Product = t2.Product
AND t1.LineID = t2.LineID
ORDER BY TimeStamp DESC
) AS PrevCount
FROM cte t1
) t1
GROUP BY LineID, Hour, Product
ORDER BY LineID, Hour, Product
非常感谢
答案 0 :(得分：1)
您的数据报告相当可怕，如果您可以针对没有输出的产品没有行的数据进行报告，或者在HourCount不是增量的情况下报告更好的数据，它将是整个很容易使用。
首先，我选择构建一个计算每一行的CTE，无论该行是否与正在输出的产品相对应。
SELECT t1.*
,CASE WHEN t1.Product <>
(SELECT top 1 Product
FROM t t2
WHERE t2.TimeStamp < t1.TimeStamp
AND t1.Line = t2.Line
ORDER BY TimeStamp desc
,CASE WHEN t1.Product = t2.Product
THEN 1
ELSE 0
END DESC
)
THEN 0
ELSE 1
END AS InProduction
FROM t t1
然后，如果产品未在前一行输出，我会在每行HourCount之间得到差异0。然后我GROUP这些值。
SELECT Line
,Product
,Hour
,SUM(CASE WHEN PrevInProduction = 1
THEN HourCount - PrevCount
ELSE 0
END) AS Units
FROM (SELECT t1.*
,(SELECT top 1 InProduction
FROM cte t2
WHERE t2.TimeStamp < t1.TimeStamp
AND t1.Product = t2.Product
AND t1.Line = t2.Line
ORDER BY TimeStamp DESC
) AS PrevInProduction
,(SELECT top 1 HourCount
FROM cte t2
WHERE t2.TimeStamp < t1.TimeStamp
AND t1.Product = t2.Product
AND t1.Line = t2.Line
ORDER BY TimeStamp DESC
) AS PrevCount
FROM cte t1
) t1
GROUP BY Line, Hour, Product
ORDER BY Line, Hour, Product
它当然看起来可以进行优化，但它可以为SQLFiddle
上的给定测试数据提供预期的结果答案 1 :(得分：0)
真的很难理解你在这里想做什么。但如果只是找到每小时每行产品的数量，你可以这样做：
-- Uncomment the #1 sections if you want dates too
SELECT Line, Product, Hour, COUNT(*) AS ProductCountPerHour
--, CAST(TimeStamp as DATE) DateVal /* #1 */
FROM YourTable
GROUP BY Line, Product, Hour
--, CAST(TimeStamp as DATE) DateVal /* #1 */
ORDER BY -- DateVal ASC, /* #1 */
Hour ASC
来自SELECT和GROUP BY的Scratch Line，您将获得每小时所有产品的数量