我正在尝试创建一个查询，当该帐户在[Volume]表中没有条目时，该查询包含ISO周的运行计数。该查询仅返回一个帐户样本，因此我创建了几个CTE来限制记录数并加入卷表，以便在结果中显示没有数量的周数。
为了说明我正在寻找的结果：
ISOWk | SurrID | Weekly Volume | No vol Count
201601 | 001 | 0 | 1
201601 | 002 | 5 | 0
201602 | 001 | 0 | 2
201602 | 002 | 0 | 1
201603 | 001 | 125| 0
201603 | 002 | 75 | 0
201604 | 001 | 0 | 1
201604 | 002 | 75 | 0
正如您所看到的，SurrID 001账户在201601和201602周没有成交量，因此201602周的[无累计数]为2。在201603周，有成交量，因此计数器重置为0并增加到1 201604年。
从我已经完成的研究中我已经设法使用带有窗口函数的ROW_NUMBER运行连续计数，但是如果有音量则不会重置（如我的示例中的201603周）。我无法弄清楚的是如何计算连续的零值并在需要时重置。
我已经在下方提供了我的完整查询，以便您全面了解（请在此指出任何特别糟糕的做法 - 我仍然找到自己的方式！）。这一切都按预期工作，直到我包括第三个CTE“ND”。然后需要45分钟才能返回超过2000行，并返回不显示每周音量的行的非重置计数。
WITH Surrs AS
(
SELECT SurrID, OracleStartDate AS OSD
FROM (
SELECT ca.SurrID, OracleStartDate, ROW_NUMBER() OVER(ORDER BY OracleStartDate) as rn
FROM tblCustomerAccounts ca
JOIN tblAccountUpdates au
ON ca.SurrID = au.SurrID
WHERE CustomerType_ID IN (1,2,3,4,5,6,7,12)
AND au.ISOWk = 201641
) a
WHERE rn % 1000 = 0
),
Updates AS
(
SELECT au.ISOWk, s.SurrID, (CASE WHEN AccStatus_ID = 1 THEN 'A' ELSE 'I' END) AS AccStatus, (CASE WHEN dbo.udf_ConvertDateToISOWeek(OSD) <= BBC THEN 'B' ELSE 'F' END) AS Book
FROM Surrs s
JOIN (
SELECT ISOWk,
(SELECT BBCutOff FROM dbo.udf_CutOffWeeks(ISOWk)) AS BBC,
(SELECT FYStart FROM dbo.udf_CutOffWeeks(ISOWk)) AS FYS,
(SELECT FYEnd FROM dbo.udf_CutOffWeeks(ISOWk)) AS FYE,
(SELECT BYStart FROM dbo.udf_CutOffWeeks(ISOWk)) AS BYS,
(SELECT BYEnd FROM dbo.udf_CutOffWeeks(ISOWk)) AS BYE,
SurrID,
AccStatus_ID
FROM tblAccountUpdates
) au
ON au.SurrID = s.SurrID
),
NDs AS
(
SELECT u.ISOWk, u.SurrID, ROW_NUMBER() OVER (PARTITION BY u.SurrID ORDER BY u.ISOWk) AS NDCount
FROM Updates u
LEFT JOIN tblTotalVolumes tv
ON u.SurrID = tv.SurrID
AND u.ISOWk = tv.ISOWk
WHERE tv.Volume IS NULL
AND u.ISOWk >= 201601
)
SELECT tw.ISOWk,
tw.SurrID,
(CASE WHEN Volume IS NULL THEN 0 ELSE Volume END) AS [Weekly Volume],
tw.Book,
tw.AccStatus,
(CASE WHEN tw.AccStatus = 'I' AND lw.AccStatus = 'A' THEN 'Y' ELSE '' END) AS [Stopped this week],
(CASE WHEN tw.AccStatus = 'A' AND lw.AccStatus = 'I' THEN 'Y' ELSE '' END) AS [Restarted this week],
(CASE WHEN NDCount IS NULL THEN 0 ELSE NDCount END) AS [Consecutive ND Weeks]
FROM Updates tw
JOIN Updates lw
ON lw.ISOWk = dbo.udf_ConvertDateToISOWeek(DATEADD("ww",-1,dbo.udf_ConvertISOWkToDate(tw.ISOWk)))
AND tw.SurrID = lw.SurrID
LEFT JOIN tblTotalVolumes tv
ON tw.SurrID = tv.SurrID
AND tw.ISOWk = tv.ISOWk
LEFT JOIN NDs
ON tw.SurrID = nds.SurrID
AND tw.ISOWk = nds.ISOWk
ORDER BY tw.ISOWk
重申我需要的内容：[连续ND周]专栏应连续计算[每周音量]为0周的时间。非常感谢帮助。
由于
更新：
我试图实现@Gordon Linoff的帖子，但是当[Weekly Volume]有值时，我的计数器不会重置为0。这是我修改过的查询：
SELECT t.*, (CASE WHEN [Weekly Volume] = 0 THEN ROW_NUMBER() OVER (PARTITION BY t.SurrID, grp ORDER BY ISOWk) ELSE 0 END) AS [ND Count]
FROM (
SELECT tw.ISOWk,
s.SurrID,
tw.AccStatus,
(CASE WHEN tv.Volume IS NULL THEN 0 ELSE tv.Volume END) AS [Weekly Volume],
(CASE WHEN dbo.udf_ConvertDateToISOWeek(OSD) <= BBC THEN 'B' ELSE 'F' END) AS Book,
(CASE WHEN tw.AccStatus = 'I' AND lw.AccStatus = 'A' THEN 'Y' ELSE '' END) AS [Stopped this week],
(CASE WHEN tw.AccStatus = 'A' AND lw.AccStatus = 'I' THEN 'Y' ELSE '' END) AS [Restarted this week],
SUM(CASE WHEN tv.volume > 0 THEN 1 ELSE 0 END) OVER(PARTITION BY tv.SurrID ORDER BY tv.ISOWk) AS grp
FROM (
SELECT SurrID, OracleStartDate AS OSD
FROM (
SELECT ca.SurrID, OracleStartDate, ROW_NUMBER() OVER(ORDER BY OracleStartDate) as rn
FROM tblCustomerAccounts ca
JOIN tblAccountUpdates au
ON ca.SurrID = au.SurrID
WHERE CustomerType_ID IN (1,2,3,4,5,6,7,12)
AND au.ISOWk = 201641
) a
WHERE rn % 1000 = 0
) s
JOIN (
SELECT ISOWk,
(SELECT BBCutOff FROM dbo.udf_CutOffWeeks(ISOWk)) AS BBC,
(SELECT FYStart FROM dbo.udf_CutOffWeeks(ISOWk)) AS FYS,
(SELECT FYEnd FROM dbo.udf_CutOffWeeks(ISOWk)) AS FYE,
(SELECT BYStart FROM dbo.udf_CutOffWeeks(ISOWk)) AS BYS,
(SELECT BYEnd FROM dbo.udf_CutOffWeeks(ISOWk)) AS BYE,
SurrID,
(CASE WHEN AccStatus_ID = 1 THEN 'A' ELSE 'I' END) AS AccStatus
FROM tblAccountUpdates
) tw
ON tw.SurrID = s.SurrID
JOIN (
SELECT ISOWk,
SurrID,
(CASE WHEN AccStatus_ID = 1 THEN 'A' ELSE 'I' END) AS AccStatus
FROM tblAccountUpdates
) lw
ON tw.SurrID = lw.SurrID
AND dbo.udf_ConvertDateToISOWeek(DATEADD("ww",-1,dbo.udf_ConvertISOWkToDate(tw.ISOWk))) = lw.ISOWk
LEFT JOIN tblTotalVolumes tv
ON tw.ISOWk = tv.ISOWk
AND tw.SurrID = tv.SurrID
) t
ORDER BY ISOWk
更新：
我现在修改了我的查询以反映弗拉基米尔的解决方案（再一次，这是完整的查询）：
SELECT ISOWk,
SurrID,
AccStatus,
[Weekly Volume],
Book,
[Stopped this week],
[Restarted this week],
RN1,
RN2,
grp,
rn3,
(CASE WHEN [Weekly Volume] = 0 THEN rn3 ELSE 0 END) AS [ND Count]
FROM (
SELECT t.ISOWk,
t.SurrID,
t.AccStatus,
t.[Weekly Volume],
t.Book,
t.[Stopped this week],
t.[Restarted this week],
rn1,
rn2,
rn1 - rn2 AS grp,
ROW_NUMBER() OVER(PARTITION BY t.SurrID, rn1-rn2 ORDER BY ISOWk) AS rn3
FROM (
SELECT tw.ISOWk,
s.SurrID,
tw.AccStatus,
(CASE WHEN tv.Volume IS NULL THEN 0 ELSE tv.Volume END) AS [Weekly Volume],
(CASE WHEN dbo.udf_ConvertDateToISOWeek(OSD) <= BBC THEN 'B' ELSE 'F' END) AS Book,
(CASE WHEN tw.AccStatus = 'I' AND lw.AccStatus = 'A' THEN 'Y' ELSE '' END) AS [Stopped this week],
(CASE WHEN tw.AccStatus = 'A' AND lw.AccStatus = 'I' THEN 'Y' ELSE '' END) AS [Restarted this week],
ROW_NUMBER() OVER(PARTITION BY tw.SurrID ORDER BY tw.ISOWk) AS rn1,
ROW_NUMBER() OVER(PARTITION BY tw.SurrID, tv.Volume ORDER BY tw.ISOWk) AS rn2
FROM (
SELECT SurrID, OracleStartDate AS OSD
FROM (
SELECT ca.SurrID, OracleStartDate, ROW_NUMBER() OVER(ORDER BY OracleStartDate) as rn
FROM tblCustomerAccounts ca
JOIN tblAccountUpdates au
ON ca.SurrID = au.SurrID
WHERE CustomerType_ID IN (1,2,3,4,5,6,7,12)
AND au.ISOWk = 201641
) a
WHERE rn % 2000 = 0
) s
JOIN (
SELECT ISOWk,
(SELECT BBCutOff FROM dbo.udf_CutOffWeeks(ISOWk)) AS BBC,
(SELECT FYStart FROM dbo.udf_CutOffWeeks(ISOWk)) AS FYS,
(SELECT FYEnd FROM dbo.udf_CutOffWeeks(ISOWk)) AS FYE,
(SELECT BYStart FROM dbo.udf_CutOffWeeks(ISOWk)) AS BYS,
(SELECT BYEnd FROM dbo.udf_CutOffWeeks(ISOWk)) AS BYE,
SurrID,
(CASE WHEN AccStatus_ID = 1 THEN 'A' ELSE 'I' END) AS AccStatus
FROM tblAccountUpdates
) tw
ON tw.SurrID = s.SurrID
JOIN (
SELECT ISOWk,
SurrID,
(CASE WHEN AccStatus_ID = 1 THEN 'A' ELSE 'I' END) AS AccStatus
FROM tblAccountUpdates
) lw
ON tw.SurrID = lw.SurrID
AND dbo.udf_ConvertDateToISOWeek(DATEADD("ww",-1,dbo.udf_ConvertISOWkToDate(tw.ISOWk))) = lw.ISOWk
LEFT JOIN tblTotalVolumes tv
ON tw.ISOWk = tv.ISOWk
AND tw.SurrID = tv.SurrID
) t
) x
ORDER BY ISOWk
这是意外的示例（当[Weekly Volume]的值大于0时，计数器不会重置为0，用星号标识）结果。以下所有都具有相同的ID，因此我删除了ID列。
ISOWk | Weekly Volume | rn1 | rn2 | grp | rn3 | ND Count |
201620 | 0 | 1 | 1 | 0 | 1 | 1 |
201621 | 0 | 2 | 2 | 0 | 2 | 2 |
201622 | 0 | 3 | 3 | 0 | 3 | 3 |
201623 | 0 | 4 | 4 | 0 | 4 | 4 |
201624 | 0 | 5 | 5 | 0 | 5 | 5 |
201625 | 53 | 6 | 1 | 5 | 1 | 0 |
201626 | 49 | 7 | 1 | 6 | 1 | 0 |
201627 | 98 | 8 | 1 | 7 | 1 | 0 |
201628 | 54 | 9 | 1 | 8 | 1 | 0 |
201629 | 53 | 10 | 2 | 8 | 2 | 0 |
201630 | 103 | 11 | 1 | 10 | 1 | 0 |
201631 | 59 | 12 | 1 | 11 | 1 | 0 |
201632 | 35 | 13 | 1 | 12 | 1 | 0 |
201633 | 0 | 14 | 6 | 8 | 3 | 3 |**
201634 | 0 | 15 | 7 | 8 | 4 | 4 |**
201635 | 0 | 16 | 8 | 8 | 5 | 5 |**
201636 | 0 | 17 | 9 | 8 | 6 | 6 |**
201637 | 87 | 18 | 1 | 17 | 1 | 0 |
201638 | 136 | 19 | 1 | 18 | 1 | 0 |
201639 | 56 | 20 | 1 | 19 | 1 | 0 |
201640 | 70 | 21 | 1 | 20 | 0 | 0 |
201641 | 77 | 22 | 1 | 21 | 1 | 0 |
我的数据集中存在此问题的其他实例。
答案 0 :(得分：1)
看起来像gaps-and-islands问题。
示例数据
DECLARE @T TABLE(ISOWk int, SurrID char(3), WeeklyVolume int);
INSERT INTO @T(ISOWk, SurrID, WeeklyVolume) VALUES
(201601, '001', 0),
(201601, '002', 5),
(201602, '001', 0),
(201602, '002', 0),
(201603, '001',125),
(201603, '002', 75),
(201604, '001', 0),
(201604, '002', 75),
(201620, '003', 0),
(201621, '003', 0),
(201622, '003', 0),
(201623, '003', 0),
(201624, '003', 0),
(201625, '003', 53),
(201626, '003', 49),
(201627, '003', 98),
(201628, '003', 54),
(201629, '003', 53),
(201630, '003',103),
(201631, '003', 59),
(201632, '003', 35),
(201633, '003', 0),
(201634, '003', 0),
(201635, '003', 0),
(201636, '003', 0),
(201637, '003', 87),
(201638, '003',136),
(201639, '003', 56),
(201640, '003', 70),
(201641, '003', 77),
(201601, '004', 0),
(201602, '004', 6),
(201603, '004', 0),
(201604, '004', 0);
我使用SurrID=003添加了您的扩展样本，并使用SurrID=004添加了我的样本。
<强>查询
WITH
CTE
AS
(
SELECT
ISOWk
,SurrID
,WeeklyVolume
,ROW_NUMBER() OVER (PARTITION BY SurrID ORDER BY ISOWk) AS rn1
,ROW_NUMBER() OVER (PARTITION BY SurrID,WeeklyVolume ORDER BY ISOWk) AS rn2
FROM @T
)
,CTE2
AS
(
SELECT
ISOWk
,SurrID
,WeeklyVolume
,rn1
,rn2
,rn1-rn2 AS grp
,ROW_NUMBER() OVER (PARTITION BY SurrID,WeeklyVolume,rn1-rn2 ORDER BY ISOWk) AS rn3
FROM CTE
)
SELECT
ISOWk
,SurrID
,WeeklyVolume
,rn1
,rn2
,grp
,rn3
,CASE WHEN WeeklyVolume = 0 THEN rn3 ELSE 0 END AS NoVolumeCount
FROM CTE2
ORDER BY SurrID, ISOWk;
<强>结果
+--------+--------+--------------+-----+-----+-----+-----+---------------+
| ISOWk | SurrID | WeeklyVolume | rn1 | rn2 | grp | rn3 | NoVolumeCount |
+--------+--------+--------------+-----+-----+-----+-----+---------------+
| 201601 | 001 | 0 | 1 | 1 | 0 | 1 | 1 |
| 201602 | 001 | 0 | 2 | 2 | 0 | 2 | 2 |
| 201603 | 001 | 125 | 3 | 1 | 2 | 1 | 0 |
| 201604 | 001 | 0 | 4 | 3 | 1 | 1 | 1 |
| 201601 | 002 | 5 | 1 | 1 | 0 | 1 | 0 |
| 201602 | 002 | 0 | 2 | 1 | 1 | 1 | 1 |
| 201603 | 002 | 75 | 3 | 1 | 2 | 1 | 0 |
| 201604 | 002 | 75 | 4 | 2 | 2 | 2 | 0 |
| 201620 | 003 | 0 | 1 | 1 | 0 | 1 | 1 |
| 201621 | 003 | 0 | 2 | 2 | 0 | 2 | 2 |
| 201622 | 003 | 0 | 3 | 3 | 0 | 3 | 3 |
| 201623 | 003 | 0 | 4 | 4 | 0 | 4 | 4 |
| 201624 | 003 | 0 | 5 | 5 | 0 | 5 | 5 |
| 201625 | 003 | 53 | 6 | 1 | 5 | 1 | 0 |
| 201626 | 003 | 49 | 7 | 1 | 6 | 1 | 0 |
| 201627 | 003 | 98 | 8 | 1 | 7 | 1 | 0 |
| 201628 | 003 | 54 | 9 | 1 | 8 | 1 | 0 |
| 201629 | 003 | 53 | 10 | 2 | 8 | 1 | 0 |
| 201630 | 003 | 103 | 11 | 1 | 10 | 1 | 0 |
| 201631 | 003 | 59 | 12 | 1 | 11 | 1 | 0 |
| 201632 | 003 | 35 | 13 | 1 | 12 | 1 | 0 |
| 201633 | 003 | 0 | 14 | 6 | 8 | 1 | 1 |
| 201634 | 003 | 0 | 15 | 7 | 8 | 2 | 2 |
| 201635 | 003 | 0 | 16 | 8 | 8 | 3 | 3 |
| 201636 | 003 | 0 | 17 | 9 | 8 | 4 | 4 |
| 201637 | 003 | 87 | 18 | 1 | 17 | 1 | 0 |
| 201638 | 003 | 136 | 19 | 1 | 18 | 1 | 0 |
| 201639 | 003 | 56 | 20 | 1 | 19 | 1 | 0 |
| 201640 | 003 | 70 | 21 | 1 | 20 | 1 | 0 |
| 201641 | 003 | 77 | 22 | 1 | 21 | 1 | 0 |
| 201601 | 004 | 0 | 1 | 1 | 0 | 1 | 1 |
| 201602 | 004 | 6 | 2 | 1 | 1 | 1 | 0 |
| 201603 | 004 | 0 | 3 | 2 | 1 | 1 | 1 |
| 201604 | 004 | 0 | 4 | 3 | 1 | 2 | 2 |
+--------+--------+--------------+-----+-----+-----+-----+---------------+
我在结果中包含了中间列，因此您可以了解其工作原理。
gaps-and-islands的标准方法是ROW_NUMBER的两个序列 - 一个是普通序列（rn1），第二个是WeeklyVolume（rn2）分区。
rn1和rn2之间的差异给出了组（岛）（grp）的ID。计算由WeeklyVolume和此组（rn3）分区的另一行号行序列，并仅在WeeklyVolume为零时使用它。
显然，上面的所有内容最初都由SurrID分区。
在答案的第一个变体中，我忘记在WeeklyVolume的最后一个分区中加入rn3。
答案 1 :(得分：0)
这是一种方法：
SurrId的前一个非0值的数量。此编号标识组。row_number()。row_number()时，只考虑0。这导致：
select t.*,
(case when weeklyvolume = 0
then row_number() over (partition by SurrId, grp order by ISOwk)
else 0
end) as NoVolCount
from (select t.*,
sum(case when weeklyvolume > 0 then 1 else 0 end) over (partition by SurrId order by ISOwk) as grp
from t
) t;