在查询计算中包括先前的行

时间：2017-07-17 05:38:05

标签： sql sql-server tsql

我有一个问题，我需要比较过去1个月和过去6个月内客户的权重％差异。

例如，比较下面这两个值之间的1个月。该客户的最新条目以及上个月的最新条目。如果上个月没有条目，则会显示N / A. 

16/07/2017 19:00    63.08
18/06/2017 15:00    62.54

％差异为0.8634473936680511。

以下这两个值之间的6个月。该客户的最新条目以及6个月前的最新条目。如果6个月前没有进入，则会显示N / A. 

16/07/2017 19:00    63.08
19/02/2017 13:45    61.5

％差异为3.3251433251433276

并且基本上重复整个列表中的每个重量输入以计算1和6个月的差异。

ClientId    DateOccurred                Weight
5037        2017-07-16 19:00:00.000     63.08
5037        2017-07-03 16:15:00.000     61.86
5037        2017-06-18 15:00:00.000     62.54
5037        2017-06-05 16:25:00.000     62.20
5037        2017-05-21 15:00:00.000     61.88
5037        2017-05-14 14:30:00.000     62.54
5037        2017-05-07 15:30:00.000     62.04
5037        2017-04-30 16:30:00.000     61.62
5037        2017-04-23 16:10:00.000     62.42
5037        2017-04-16 16:30:00.000     61.96
5037        2017-04-09 14:57:00.000     62.30
5037        2017-04-02 18:45:00.000     61.50
5037        2017-03-26 15:14:00.000     61.22
5037        2017-03-12 15:05:00.000     61.06
5037        2017-03-05 19:30:00.000     61.20
5037        2017-02-19 13:45:00.000     61.50
5037        2017-02-12 15:35:00.000     61.56
5037        2017-01-29 10:10:00.000     59.68
5037        2017-01-22 16:00:00.000     60.50
5037        2017-01-15 13:30:00.000     60.80
5037        2017-01-08 18:00:00.000     64.08
5037        2017-01-01 14:05:00.000     62.62
5037        2016-12-18 15:40:00.000     63.26
5037        2016-12-11 14:27:00.000     62.80
5037        2016-12-04 19:00:00.000     62.14
5037        2016-11-20 15:25:00.000     61.26
5037        2016-11-06 19:00:00.000     61.72
5037        2016-10-30 13:30:00.000     60.82
5037        2016-10-23 16:05:00.000     61.44
5037        2016-10-17 15:32:00.000     60.48
5037        2016-10-09 18:49:00.000     59.80
5037        2016-10-02 13:30:00.000     59.00
5037        2016-09-25 11:23:00.000     59.60
5037        2016-09-11 13:58:00.000     58.38
5037        2016-09-04 16:00:00.000     60.23
5037        2016-08-28 16:25:00.000     59.46
5037        2016-08-21 14:45:00.000     61.48
5037        2016-08-14 18:20:00.000     61.04
5037        2016-07-24 13:58:00.000     60.28
5037        2016-07-17 15:00:00.000     59.96
5037        2016-07-10 13:45:00.000     60.34
5037        2016-07-03 14:12:00.000     59.70
5037        2016-06-26 14:45:00.000     58.92
5037        2016-06-20 18:45:00.000     53.40
5037        2016-06-06 12:48:00.000     58.52

CREATE TABLE [dbo].[WeightEntries](
[ResidentId] [int] NULL,
[DateOccurred] [datetime] NULL,
[Weight] [decimal](6, 2) NULL
) ON [PRIMARY]
GO
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A61D00D2F000 AS DateTime), CAST(58.52 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A62B0134FD90 AS DateTime), CAST(53.40 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A63100F31290 AS DateTime), CAST(58.92 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A63800EA0240 AS DateTime), CAST(59.70 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A63F00E297D0 AS DateTime), CAST(60.34 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A64600F73140 AS DateTime), CAST(59.96 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A64D00E629E0 AS DateTime), CAST(60.28 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A662012E1FC0 AS DateTime), CAST(61.04 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A66900F31290 AS DateTime), CAST(61.48 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A670010E89D0 AS DateTime), CAST(59.46 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6770107AC00 AS DateTime), CAST(60.23 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A67E00E629E0 AS DateTime), CAST(58.38 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A68C00BB9770 AS DateTime), CAST(59.60 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A69300DE7920 AS DateTime), CAST(59.00 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A69A013616D0 AS DateTime), CAST(59.80 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6A200FFFB40 AS DateTime), CAST(60.48 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6A801090B90 AS DateTime), CAST(61.44 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6AF00DE7920 AS DateTime), CAST(60.82 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6B601391C40 AS DateTime), CAST(61.72 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6C400FE0F10 AS DateTime), CAST(61.26 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6D201391C40 AS DateTime), CAST(62.14 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6D900EE20F0 AS DateTime), CAST(62.80 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6E001022DC0 AS DateTime), CAST(63.26 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6EE00E81610 AS DateTime), CAST(62.62 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6F50128A180 AS DateTime), CAST(64.08 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A6FC00DE7920 AS DateTime), CAST(60.80 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A7030107AC00 AS DateTime), CAST(60.50 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A70A00A78AA0 AS DateTime), CAST(59.68 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A7180100CE30 AS DateTime), CAST(61.56 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A71F00E297D0 AS DateTime), CAST(61.50 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A72D014159A0 AS DateTime), CAST(61.20 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A73400F890D0 AS DateTime), CAST(61.06 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A74200FB09A0 AS DateTime), CAST(61.22 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A7490134FD90 AS DateTime), CAST(61.50 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A75000F65E50 AS DateTime), CAST(62.30 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A757010FE960 AS DateTime), CAST(61.96 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A75E010A6B20 AS DateTime), CAST(62.42 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A765010FE960 AS DateTime), CAST(61.62 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A76C00FF6EA0 AS DateTime), CAST(62.04 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A77300EEF3E0 AS DateTime), CAST(62.54 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A77A00F73140 AS DateTime), CAST(61.88 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A789010E89D0 AS DateTime), CAST(62.20 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A79600F73140 AS DateTime), CAST(62.54 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A7A5010BCAB0 AS DateTime), CAST(61.86 AS Decimal(6, 2)))
INSERT [dbo].[WeightEntries] ([ResidentId], [DateOccurred], [Weight]) VALUES (5037, CAST(0x0000A7B201391C40 AS DateTime), CAST(63.08 AS Decimal(6, 2)))

1 个答案:

答案 0 :(得分：1)

您可以这样做的一种方法是使用CTE使用分区的ROW_NUMBER（）来确定每个月的最新条目以及一些子查询以确定某些时间间隔的差异。例如：

WITH CTE(ResidentId, DateOccurred, [Weight]) AS
(
    SELECT ResidentId, DateOccurred, [Weight]
    FROM 
    (
        SELECT *, LatestEachMonth = ROW_NUMBER() OVER (PARTITION BY ResidentId, DATEDIFF(MONTH, 0, DateOccurred) ORDER BY DateOccurred DESC)
        FROM WeightEntries
    ) AS T
    WHERE LatestEachMonth = 1
)
SELECT ResidentId,
    DateOccurred,
    [Weight],
    OneMonthPercentage = 100.0 * [Weight] / (SELECT [Weight] FROM CTE WHERE ResidentId = C.ResidentId AND DATEDIFF(MONTH, DateOccurred, C.DateOccurred) = 1) - 100,
    SixMonthPercentage = 100.0 * [Weight] / (SELECT [Weight] FROM CTE WHERE ResidentId = C.ResidentId AND DATEDIFF(MONTH, DateOccurred, C.DateOccurred) = 6) - 100
FROM CTE AS C;
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