SQL 查询的入口点和出口点特定问题
SQL Entry and Exit points specific problem with query
背景：
我有一些仪器数据，其中有数十万条记录。我通过在几分钟内拍摄时间片来简化这一点。原始数据在某个时间点会有一个特定的读数，例如 0.004，但是由于时间片数据现在是一个汇总，因此现在包含时间片内相同读数的 3 个读数 Min/Max/Avg。
我正在尝试在此数据上创建入口点和出口点。我花了几天时间试图解决的一个问题是我不希望出口点与入口点在同一时间片上。它必须有一个更高版本的 PKey。
例如，这是错误的，因为第一条记录在同一个 PKey 上进入和退出。
查看数据我将退出入口和出口点如下
进入 3550724 - 退出 3551615
输入 3559070 - 退出 3571982
输入 3575126 - 退出 NULL
如下
请有人帮助更正我的查询，以便出口点始终晚于入口点并且不相等。如果没有出口点，则显示入口点，但出口点将为空。
我当前的查询：
declare @EntryMinS1 float = 0.00418848167539267;
declare @ExitMaxT1 float = 0.00429319371727749;
declare @MinPressure float = 209.424083769634;
declare @YearFrom int = 2017;
with cte2 AS
( -- apply your logic to mark potential entry and exit rows
SELECT *
,CASE WHEN [Pressure] >= @MinPressure and MinS1 <= @EntryMinS1 THEN pKey END AS possibleEntry
,CASE WHEN [Pressure] >= @MinPressure and MaxT1 >= @ExitMaxT1 THEN pKey END AS possibleExit
FROM dbo.tblTestIntrumentData
where year([TimeSlice]) >= @YearFrom
)
, cte3 as
(
select *
,Max(possibleEntry) -- most recent possibleEntry
Over (PARTITION BY [IntrumentId], [TestName]
ORDER BY pKey
ROWS Unbounded Preceding) AS lastEntry
from cte2
)
, cte4 as
(
select *
,Max(possibleExit) -- most recent possibleExit
Over (PARTITION BY [IntrumentId], [TestName]
ORDER BY pKey
ROWS BETWEEN Unbounded Preceding AND 1 Preceding) AS lastExit
from cte3
)
,groupRows AS
( -- mark rows from the 1st entry to the exit row
SELECT *
-- if lastEntry <= lastExit we're after an exit and before an entry -> don't return this row
,CASE WHEN lastEntry <= lastExit THEN 0 ELSE 1 END AS returnFlag
-- assign the same group number to consecutive rows in group
,Sum(CASE WHEN lastEntry <= lastExit THEN 1 ELSE 0 END)
Over (PARTITION BY [IntrumentId], [TestName]
ORDER BY pKey
ROWS Unbounded Preceding) AS grp
FROM cte4
WHERE (possibleEntry IS NOT NULL OR possibleExit IS NOT NULL)
AND lastEntry IS NOT NULL
)
,rowNum AS
( -- get the data from the first and last row of an entry/exit group
SELECT *
-- to get the values of the 1st row in a group
,Row_Number() Over (PARTITION BY [IntrumentId], [TestName], grp ORDER BY pKey) AS rn
-- to get the values of the last row in a group
,Last_Value(possibleExit)
Over (PARTITION BY [IntrumentId], [TestName], grp
ORDER BY pKey
ROWS BETWEEN Unbounded Preceding AND Unbounded Following) AS ExitTimestamp
,Last_Value(CASE WHEN possibleExit IS NOT NULL THEN PKey END)
Over (PARTITION BY [IntrumentId], [TestName], returnFlag, grp
ORDER BY pKey
ROWS BETWEEN Unbounded Preceding AND Unbounded Following) AS ExitPKey
FROM groupRows
WHERE returnFlag = 1
)
select * from rowNum
where IntrumentId = 'N-12892'
and TestName = 'T451'
and rn = 1
ORDER BY IntrumentId, TestName, PKey
使用架构和数据创建 TABLE：
USE [dbTestData]
GO
/****** Object: Table [dbo].[tblTestIntrumentData] Script Date: 10/04/2019 10:13:20 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[tblTestIntrumentData](
[TimeSlice] [datetime2](7) NULL,
[IntrumentId] [varchar](7) NOT NULL,
[TestName] [varchar](4) NOT NULL,
[AvgT1] [float] NULL,
[MinT1] [float] NULL,
[MaxT1] [float] NULL,
[AvgS1] [float] NULL,
[MinS1] [float] NULL,
[MaxS1] [float] NULL,
[MaxT2] [float] NULL,
[MaxS2] [float] NULL,
[MinB1] [float] NULL,
[Pressure] [float] NULL,
[pKey] [bigint] NULL
) ON [PRIMARY]
GO
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T09:55:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.005, 0.004, 0.004, 0.005, 1.116, 2.36, 0.003, 13025.385, 3550724)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:00:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.005, 0.005, 0.005, 0.005, 0.005, 0.006, 2.629, 0.438, 0.001, 15149.751, 3571982)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:25:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.006, 0.006, 0.006, 0.006, 0.006, 0.007, 0.209, 2.718, 0.017, 13562.116, 3555221)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:30:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.006, 0.006, 0.006, 0.006, 0.006, 0.006, 0.487, 3.223, 0.002, 13607.694, 3555878)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:35:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.003, 0.004, 0.004, 0.003, 0.004, 5.202, 3.001, 0.001, 16065.146, 3577673)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:40:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.003, 0.004, 0.004, 0.004, 0.004, 4.482, 2.902, 0.001, 16350.153, 3578519)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:10:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.007, 0.007, 0.007, 0.007, 0.007, 0.007, 0.962, 0.275, 0.005, 13295.4, 3553139)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:45:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.005, 0.005, 0.005, 0.005, 0.005, 0.006, 4.498, 14.667, 0.004, 13854.237, 3558230)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:20:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.005, 5.426, 9.98, 0.003, 15762.039, 3575126)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:05:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.007, 0.007, 0.008, 0.008, 0.008, 0.008, 1.007, 0.524, 0.001, 13273.765, 3552443)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:15:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.007, 0.006, 0.007, 0.007, 0.007, 0.007, 3.585, 0.725, 0.003, 13378.195, 3553832)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:50:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.005, 5.779, 8.781, 0.003, 13900.076, 3559070)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T11:00:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.004, 2.537, 2.045, 0.088, 14061.833, 3560585)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:20:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.007, 0.006, 0.007, 0.007, 0.007, 0.007, 3.608, 3.609, 0.023, 13490.572, 3554492)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:55:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.004, 1.39, 1.569, 0.001, 13951.427, 3559895)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:10:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 1.141, 3.528, 0.002, 15257.154, 3573476)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:35:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.006, 0.005, 0.006, 0.006, 0.006, 0.006, 0.352, 0.898, 0.002, 13649.856, 3556601)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:40:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.005, 0.005, 0.005, 0.006, 0.005, 0.006, 4.496, 0.835, 0.001, 13824.016, 3557420)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:30:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.004, 21.651, 2.161, 0.005, 15963.565, 3576818)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:00:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.007, 0.005, 0.007, 0.007, 0.007, 0.007, 1.257, 0.301, 0.001, 13226.338, 3551615)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T03:55:26.7680000' AS DateTime2), N'N-12892', N'T451', NULL, NULL, NULL, NULL, NULL, NULL, 0.018, 0.009, 0.018, 14788.663, 3571283)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:05:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 2.333, 4.672, 0.001, 15172.775, 3572744)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:15:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.005, 0.005, 0.004, 0.005, 4.181, 2.161, 0.018, 15366.178, 3574277)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:25:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.004, 3.549, 3.854, 0.003, 15838.353, 3575948)
我认为这可以稍微简化一些，但我有点难以尝试跳出当前解决方案的框框思考以实际找到简化。不管怎样：
declare @EntryMinS1 float = 0.00418848167539267;
declare @ExitMaxT1 float = 0.00429319371727749;
declare @MinPressure float = 209.424083769634;
declare @YearFrom int = 2017;
with cte2 AS
( -- apply your logic to mark potential entry and exit rows
SELECT *
,CASE WHEN [Pressure] >= @MinPressure and MinS1 <= @EntryMinS1 THEN pKey END AS possibleEntry
,CASE WHEN [Pressure] >= @MinPressure and MaxT1 >= @ExitMaxT1 THEN pKey END AS possibleExit
FROM dbo.tblTestIntrumentData
where year([TimeSlice]) >= @YearFrom
),
cteFindExit AS
(
select *, -- find the first entry with an exit after our entry
(SELECT MIN(pkey) FROM cte2 findExit
WHERE findExit.possibleExit > entrance.possibleEntry
AND findExit.IntrumentId = entrance.IntrumentId
AND findExit.TestName = entrance.TestName
) findExit
from cte2 entrance
),
cteFindEntry AS
(
SELECT *
-- it's not an entry if
, IIF(possibleEntry IS NULL -- isn't a possible entry
OR findExit = LAG(findExit, 1, 0) OVER (PARTITION BY IntrumentId, TestName ORDER BY pkey) -- or has the same exit as the previous record
OR COALESCE(possibleExit, findExit) IS NULL, -- or doesn't have an exit at all
0,
1 -- yeah it's a starter all right
) AS starter
FROM cteFindExit
)
SELECT * FROM cteFindEntry WHERE starter = 1
possibleEntry 和 findExit 定义集合。 Here's a working example on dbfiddle.
在 cteFindExit 中，我正在寻找第一个可能退出的条目，它出现在此处可能的进入之后。所以对于我们的起始行，这将是出口。然后在 cteFindEntry 中，我丢弃了所有实际上不是第一个条目的行，这发生在：
- 要么该记录根本不是条目
- 或者，对于那些，他们的退出（从
cteFindExit）与他们的前任相同（这适用于您屏幕截图中的第二组）
- 或者，对于那些没有可能的出口不同于自己的人，设置可能的出口（这将适用于第三组，当出口确实为NULL时，会从中找到第一条记录那个组）
背景： 我有一些仪器数据，其中有数十万条记录。我通过在几分钟内拍摄时间片来简化这一点。原始数据在某个时间点会有一个特定的读数，例如 0.004，但是由于时间片数据现在是一个汇总，因此现在包含时间片内相同读数的 3 个读数 Min/Max/Avg。
我正在尝试在此数据上创建入口点和出口点。我花了几天时间试图解决的一个问题是我不希望出口点与入口点在同一时间片上。它必须有一个更高版本的 PKey。
例如，这是错误的，因为第一条记录在同一个 PKey 上进入和退出。
查看数据我将退出入口和出口点如下
进入 3550724 - 退出 3551615
输入 3559070 - 退出 3571982
输入 3575126 - 退出 NULL
如下
请有人帮助更正我的查询，以便出口点始终晚于入口点并且不相等。如果没有出口点，则显示入口点，但出口点将为空。
我当前的查询：
declare @EntryMinS1 float = 0.00418848167539267;
declare @ExitMaxT1 float = 0.00429319371727749;
declare @MinPressure float = 209.424083769634;
declare @YearFrom int = 2017;
with cte2 AS
( -- apply your logic to mark potential entry and exit rows
SELECT *
,CASE WHEN [Pressure] >= @MinPressure and MinS1 <= @EntryMinS1 THEN pKey END AS possibleEntry
,CASE WHEN [Pressure] >= @MinPressure and MaxT1 >= @ExitMaxT1 THEN pKey END AS possibleExit
FROM dbo.tblTestIntrumentData
where year([TimeSlice]) >= @YearFrom
)
, cte3 as
(
select *
,Max(possibleEntry) -- most recent possibleEntry
Over (PARTITION BY [IntrumentId], [TestName]
ORDER BY pKey
ROWS Unbounded Preceding) AS lastEntry
from cte2
)
, cte4 as
(
select *
,Max(possibleExit) -- most recent possibleExit
Over (PARTITION BY [IntrumentId], [TestName]
ORDER BY pKey
ROWS BETWEEN Unbounded Preceding AND 1 Preceding) AS lastExit
from cte3
)
,groupRows AS
( -- mark rows from the 1st entry to the exit row
SELECT *
-- if lastEntry <= lastExit we're after an exit and before an entry -> don't return this row
,CASE WHEN lastEntry <= lastExit THEN 0 ELSE 1 END AS returnFlag
-- assign the same group number to consecutive rows in group
,Sum(CASE WHEN lastEntry <= lastExit THEN 1 ELSE 0 END)
Over (PARTITION BY [IntrumentId], [TestName]
ORDER BY pKey
ROWS Unbounded Preceding) AS grp
FROM cte4
WHERE (possibleEntry IS NOT NULL OR possibleExit IS NOT NULL)
AND lastEntry IS NOT NULL
)
,rowNum AS
( -- get the data from the first and last row of an entry/exit group
SELECT *
-- to get the values of the 1st row in a group
,Row_Number() Over (PARTITION BY [IntrumentId], [TestName], grp ORDER BY pKey) AS rn
-- to get the values of the last row in a group
,Last_Value(possibleExit)
Over (PARTITION BY [IntrumentId], [TestName], grp
ORDER BY pKey
ROWS BETWEEN Unbounded Preceding AND Unbounded Following) AS ExitTimestamp
,Last_Value(CASE WHEN possibleExit IS NOT NULL THEN PKey END)
Over (PARTITION BY [IntrumentId], [TestName], returnFlag, grp
ORDER BY pKey
ROWS BETWEEN Unbounded Preceding AND Unbounded Following) AS ExitPKey
FROM groupRows
WHERE returnFlag = 1
)
select * from rowNum
where IntrumentId = 'N-12892'
and TestName = 'T451'
and rn = 1
ORDER BY IntrumentId, TestName, PKey
使用架构和数据创建 TABLE：
USE [dbTestData]
GO
/****** Object: Table [dbo].[tblTestIntrumentData] Script Date: 10/04/2019 10:13:20 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[tblTestIntrumentData](
[TimeSlice] [datetime2](7) NULL,
[IntrumentId] [varchar](7) NOT NULL,
[TestName] [varchar](4) NOT NULL,
[AvgT1] [float] NULL,
[MinT1] [float] NULL,
[MaxT1] [float] NULL,
[AvgS1] [float] NULL,
[MinS1] [float] NULL,
[MaxS1] [float] NULL,
[MaxT2] [float] NULL,
[MaxS2] [float] NULL,
[MinB1] [float] NULL,
[Pressure] [float] NULL,
[pKey] [bigint] NULL
) ON [PRIMARY]
GO
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T09:55:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.005, 0.004, 0.004, 0.005, 1.116, 2.36, 0.003, 13025.385, 3550724)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:00:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.005, 0.005, 0.005, 0.005, 0.005, 0.006, 2.629, 0.438, 0.001, 15149.751, 3571982)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:25:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.006, 0.006, 0.006, 0.006, 0.006, 0.007, 0.209, 2.718, 0.017, 13562.116, 3555221)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:30:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.006, 0.006, 0.006, 0.006, 0.006, 0.006, 0.487, 3.223, 0.002, 13607.694, 3555878)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:35:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.003, 0.004, 0.004, 0.003, 0.004, 5.202, 3.001, 0.001, 16065.146, 3577673)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:40:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.003, 0.004, 0.004, 0.004, 0.004, 4.482, 2.902, 0.001, 16350.153, 3578519)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:10:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.007, 0.007, 0.007, 0.007, 0.007, 0.007, 0.962, 0.275, 0.005, 13295.4, 3553139)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:45:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.005, 0.005, 0.005, 0.005, 0.005, 0.006, 4.498, 14.667, 0.004, 13854.237, 3558230)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:20:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.005, 5.426, 9.98, 0.003, 15762.039, 3575126)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:05:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.007, 0.007, 0.008, 0.008, 0.008, 0.008, 1.007, 0.524, 0.001, 13273.765, 3552443)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:15:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.007, 0.006, 0.007, 0.007, 0.007, 0.007, 3.585, 0.725, 0.003, 13378.195, 3553832)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:50:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.005, 5.779, 8.781, 0.003, 13900.076, 3559070)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T11:00:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.004, 2.537, 2.045, 0.088, 14061.833, 3560585)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:20:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.007, 0.006, 0.007, 0.007, 0.007, 0.007, 3.608, 3.609, 0.023, 13490.572, 3554492)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:55:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.004, 1.39, 1.569, 0.001, 13951.427, 3559895)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:10:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 1.141, 3.528, 0.002, 15257.154, 3573476)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:35:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.006, 0.005, 0.006, 0.006, 0.006, 0.006, 0.352, 0.898, 0.002, 13649.856, 3556601)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:40:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.005, 0.005, 0.005, 0.006, 0.005, 0.006, 4.496, 0.835, 0.001, 13824.016, 3557420)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:30:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.004, 21.651, 2.161, 0.005, 15963.565, 3576818)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-03T10:00:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.007, 0.005, 0.007, 0.007, 0.007, 0.007, 1.257, 0.301, 0.001, 13226.338, 3551615)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T03:55:26.7680000' AS DateTime2), N'N-12892', N'T451', NULL, NULL, NULL, NULL, NULL, NULL, 0.018, 0.009, 0.018, 14788.663, 3571283)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:05:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.005, 0.005, 0.005, 0.005, 0.005, 0.005, 2.333, 4.672, 0.001, 15172.775, 3572744)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:15:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.005, 0.005, 0.004, 0.005, 4.181, 2.161, 0.018, 15366.178, 3574277)
INSERT [dbo].[tblTestIntrumentData] ([TimeSlice], [IntrumentId], [TestName], [AvgT1], [MinT1], [MaxT1], [AvgS1], [MinS1], [MaxS1], [MaxT2], [MaxS2], [MinB1], [Pressure], [pKey]) VALUES (CAST(N'2018-11-04T04:25:26.7680000' AS DateTime2), N'N-12892', N'T451', 0.004, 0.004, 0.004, 0.004, 0.004, 0.004, 3.549, 3.854, 0.003, 15838.353, 3575948)
我认为这可以稍微简化一些，但我有点难以尝试跳出当前解决方案的框框思考以实际找到简化。不管怎样：
declare @EntryMinS1 float = 0.00418848167539267;
declare @ExitMaxT1 float = 0.00429319371727749;
declare @MinPressure float = 209.424083769634;
declare @YearFrom int = 2017;
with cte2 AS
( -- apply your logic to mark potential entry and exit rows
SELECT *
,CASE WHEN [Pressure] >= @MinPressure and MinS1 <= @EntryMinS1 THEN pKey END AS possibleEntry
,CASE WHEN [Pressure] >= @MinPressure and MaxT1 >= @ExitMaxT1 THEN pKey END AS possibleExit
FROM dbo.tblTestIntrumentData
where year([TimeSlice]) >= @YearFrom
),
cteFindExit AS
(
select *, -- find the first entry with an exit after our entry
(SELECT MIN(pkey) FROM cte2 findExit
WHERE findExit.possibleExit > entrance.possibleEntry
AND findExit.IntrumentId = entrance.IntrumentId
AND findExit.TestName = entrance.TestName
) findExit
from cte2 entrance
),
cteFindEntry AS
(
SELECT *
-- it's not an entry if
, IIF(possibleEntry IS NULL -- isn't a possible entry
OR findExit = LAG(findExit, 1, 0) OVER (PARTITION BY IntrumentId, TestName ORDER BY pkey) -- or has the same exit as the previous record
OR COALESCE(possibleExit, findExit) IS NULL, -- or doesn't have an exit at all
0,
1 -- yeah it's a starter all right
) AS starter
FROM cteFindExit
)
SELECT * FROM cteFindEntry WHERE starter = 1
possibleEntry 和 findExit 定义集合。 Here's a working example on dbfiddle.
在 cteFindExit 中，我正在寻找第一个可能退出的条目，它出现在此处可能的进入之后。所以对于我们的起始行，这将是出口。然后在 cteFindEntry 中，我丢弃了所有实际上不是第一个条目的行，这发生在：
- 要么该记录根本不是条目
- 或者，对于那些，他们的退出（从
cteFindExit）与他们的前任相同（这适用于您屏幕截图中的第二组） - 或者，对于那些没有可能的出口不同于自己的人，设置可能的出口（这将适用于第三组，当出口确实为NULL时，会从中找到第一条记录那个组）