用另一个表的行填充一个表的列。基于标准答案

【问题标题】：Populating columns of one table with rows from another. Based on criteria用另一个表的行填充一个表的列。基于标准
【发布时间】：2017-02-02 21:22:39
【问题描述】：

早上好。很抱歉这篇长文，但我完全不知道如何正确地完成这一点。

我有一个用户提交的文件按项目和总分类帐帐户按月提交财务预测长达 15 年，该文件被加载到一个平面暂存表中。

--Flat Staging Table with user submitted forecast

    CREATE TABLE dbo.[STG_fcst](
        [PROJ_ID] [nvarchar](50) NOT NULL,
        [ACT_ID] [nvarchar](10) NOT NULL,
        [FC_DATE] [nvarchar](20) NOT NULL,
        [AMT_USD] [numeric](20, 2) NULL,
        [UPDATEID] [nvarchar](50) NULL,
        [DTSTAMP] [datetime] NULL
    ) ON [PRIMARY]

    GO

日期只有一列。用户只需提供年份和月份。另一方面，我有一个按预测文件夹分隔的透视表，如下所示

CREATE TABLE dbo.[FORECAST](
    [PLANKEY] [varchar](60) NOT NULL,--Plankey=Folderkey+project_id+proj_id
    [PROJ_ID] [varchar](50) NOT NULL,
    [ACT_ID] [varchar](10) NOT NULL,
    [Y1_ACT_JAN] [numeric](20, 2) NULL,
    [Y1_ACT_FEB] [numeric](20, 2) NULL,
    [Y1_ACT_MAR] [numeric](20, 2) NULL,
    [Y1_ACT_APR] [numeric](20, 2) NULL,
    [Y1_ACT_MAY] [numeric](20, 2) NULL,
    [Y1_ACT_JUN] [numeric](20, 2) NULL,
    [Y1_ACT_JUL] [numeric](20, 2) NULL,
    [Y1_ACT_AUG] [numeric](20, 2) NULL,
    [Y1_ACT_SEP] [numeric](20, 2) NULL,
    [Y1_ACT_OCT] [numeric](20, 2) NULL,
    [Y1_ACT_NOV] [numeric](20, 2) NULL,
    [Y1_ACT_DEC] [numeric](20, 2) NULL,
    [Y1_FC_JAN] [numeric](20, 2) NULL,
    [Y1_FC_FEB] [numeric](20, 2) NULL,
    [Y1_FC_MAR] [numeric](20, 2) NULL,
    [Y1_FC_APR] [numeric](20, 2) NULL,
    [Y1_FC_MAY] [numeric](20, 2) NULL,
    [Y1_FC_JUN] [numeric](20, 2) NULL,
    [Y1_FC_JUL] [numeric](20, 2) NULL,
    [Y1_FC_AUG] [numeric](20, 2) NULL,
    [Y1_FC_SEP] [numeric](20, 2) NULL,
    [Y1_FC_OCT] [numeric](20, 2) NULL,
    [Y1_FC_NOV] [numeric](20, 2) NULL,
    [Y1_FC_DEC] [numeric](20, 2) NULL,
    [Y2_FC_JAN] [numeric](20, 2) NULL,
    [Y2_FC_FEB] [numeric](20, 2) NULL,
    [Y2_FC_MAR] [numeric](20, 2) NULL,
    [Y2_FC_APR] [numeric](20, 2) NULL,
    [Y2_FC_MAY] [numeric](20, 2) NULL,
    [Y2_FC_JUN] [numeric](20, 2) NULL,
    [Y2_FC_JUL] [numeric](20, 2) NULL,
    [Y2_FC_AUG] [numeric](20, 2) NULL,
    [Y2_FC_SEP] [numeric](20, 2) NULL,
    [Y2_FC_OCT] [numeric](20, 2) NULL,
    [Y2_FC_NOV] [numeric](20, 2) NULL,
    [Y2_FC_DEC] [numeric](20, 2) NULL,
    [Y3_FC] [numeric](20, 2) NULL,
    [Y4_FC] [numeric](20, 2) NULL,
    [Y5_FC] [numeric](20, 2) NULL,
    [Y6_FC] [numeric](20, 2) NULL,
    [Y7_FC] [numeric](20, 2) NULL,
    [Y8_FC] [numeric](20, 2) NULL,
    [Y9_FC] [numeric](20, 2) NULL,
    [Y10_FC] [numeric](20, 2) NULL,
    [Y11_FC] [numeric](20, 2) NULL,
    [Y12_FC] [numeric](20, 2) NULL,
    [Y13_FC] [numeric](20, 2) NULL,
    [Y14_FC] [numeric](20, 2) NULL,
    [Y15_FC] [numeric](20, 2) NULL,
    [UPDATEID] [varchar](25) NOT NULL,
    [DTSTAMP] [datetime] NOT NULL,
 CONSTRAINT [PK_FORECAST] PRIMARY KEY CLUSTERED 
(
    [PLANKEY] ASC,
    [PROJ_ID] ASC,
    [ACT_ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

SET ANSI_PADDING OFF
GO

这是一个 15 年的预测表，由 plan_key 分隔，基本上表示预测文件夹（即 Jan Fcst、May fcst 等）每个预测文件夹的前两个日历年按月计算，第 3 年到第 15 年必须按年汇总。

我还有一个表格，告诉我每个文件夹的第一个预测月份应该是什么，以及每个月需要多少个月的计数器，所以如果第一个预测月份是 2 月，那么计数器是 24，如果 3 月然后是 23。

CREATE table dbo.[FOLDER_FCST_DT_XREF_VW]
    (FOLDERKEY  varchar(255),
    (FOLDERNAME VARCHAR(255),
FCST_BASE_DATE DATE,
CTR_STOP INT)

所以问题是我如何在临时表中获取数据并将其加载到预测表中我需要根据预测的基准日期开始加载到适当的存储桶中，所以如果基准日期是 2016 年 3 月，我需要从 2016 年 3 月开始暂存表忽略任何前一个月（如果有的话）将其放入特定项目/帐户组合的 Y1_FC_MAR 列。将开始日期增加一个月，但是计数器在外部参照表中出现的次数会在计数器用完后更新预测表中的其余每月列需要按年汇总这些日期的暂存表并填充年度存储桶。

这是表格的示例数据。

--Data for Folder Table
insert into dbo.[FOLDER_FCST_DT_XREF_VW]
(FOLDERKEY,FOLDERNAME,FCST_BASE_DATE,CTR_STOP)
Values
('AA99','Study Scenario Estimates (2016)',2016-06-01,'19'),
('AB05','2015 Feb Refresh',2015-02-01,'23'),
('AB06','2015 March Refresh',2015-03-01,'22'),
('AB07','2015 May Forecast',2015-04-01,'21'),
('AB08','2015 May Refresh',2015-05-01,'20'),
('AB09','2015 Jun Refresh',2015-06-01,'19'),
('AB10','2015 Aug Forecast',2015-07-01,'18'),
('AB11','2015 Aug Refresh',2015-08-01,'17'),
('AB12','2015 Sept Refresh',2015-09-01,'16'),
('AB13','2015 Nov Forecast',2015-10-01,'15'),
('AB14','2015 Dec Refresh',2015-12-01,'13'),
('AB16','2015 Actuals',2016-01-01,'24'),
('AB17','2016 Feb Tally',2016-02-01,'23'),
('AB18','2016 Feb Refresh',2016-02-01,'23'),
('AB19','2016 March Refresh',2016-03-01,'22'),
('AB20','2016 May Forecast',2016-04-01,'21'),
('AB21','2016 June Refresh',2016-06-01,'19'),
('AB22','2016 Aug Forecast',2016-07-01,'18'),
('AB23','2016 Sep Refresh',2016-09-01,'16'),
('AB24','2016 Nov Forecast',2016-10-01,'15'),
('AB25','2016 Dec Refresh',2016-11-01,'14')

--Data for Staging Table
insert into dbo.[STG_fcst](Proj_id,Act_Id,FC_Date)
values

('Project51','G1000','2017.03',150),
('Project7','G1000','2017.03',1867726.45),
('Project8','G1000','2017.03',168827.4),
('Project10','G1000','2017.03',38070.41),
('Project32','G1000','2017.03',13574.25),
('Project44','G1000','2017.03',23405.95),
('Project45','G1000','2017.03',164787.89),
('Project55','G1000','2017.03',76364),
('Project50','G1000','2017.03',16714.98),
('Project59','G1000','2017.03',104135.17),
('Project74','G1000','2017.03',65706),
('Project73','G1000','2017.03',5775),
('Project79','G1000','2017.03',91918.11),
('Project108','G1000','2017.03',27279),
('Project110','G1000','2017.03',142071.75),
('Project16','G1000','2017.03',45931.49),
('Project17','G1000','2017.03',141555.9),
('Project63','G1000','2017.03',423716.64),
('Project72','G1000','2017.03',25000),
('Project18','G1006','2017.03',100000),
('Project130','G1000','2017.03',92710.75),
('Project106','G1006','2017.03',44209.5),
('Project36','G1000','2017.03',207394.05),
('Project93','G1006','2017.03',63300),
('Project129','G1000','2017.03',29137.75),
('Project20','G1006','2017.03',34584),
('Project38','G1000','2017.03',57324.15),
('Project22','G1000','2017.03',169847.4),
('Project28','G1000','2017.03',49000),
('Project131','G1000','2017.03',NULL),
('Project35','G1000','2017.03',81950),
('Project57','G1006','2017.03',700),
('Project95','G1000','2017.03',21500),
('Project29','G1005','2017.03',51000),
('Project84','G1006','2017.03',47994),
('Project128','G1000','2017.03',75000),
('Project103','G1000','2017.03',37500),
('Project89','G1006','2017.03',20500),
('Project88','G1006','2017.03',42444),
('Project99','G1006','2017.03',42500),
('Project47','G1000','2017.03',56086),
('Project69','G1006','2017.03',51107),
('Project70','G1000','2017.03',14400),
('Project82','G1006','2017.03',42382),
('Project102','G1006','2017.03',7823.55),
('Project56','G1006','2017.03',8749),
('Project78','G1006','2017.03',31867),
('Project76','G1006','2017.03',20000),
('Project5','G1000','2017.03',84764),
('Project105','G1000','2017.03',3630),
('Project7','G1000','2017.06',1886317.88),
('Project8','G1000','2017.06',133876.9),
('Project65','G1000','2017.06',36573.78),
('Project12','G1000','2017.06',20000),
('Project13','G1006','2017.06',154300),
('Project45','G1000','2017.06',275020),
('Project55','G1000','2017.06',31994.89),
('Project48','G1000','2017.06',50000),
('Project50','G1000','2017.06',67140.72),
('Project59','G1000','2017.06',21168),
('Project74','G1000','2017.06',54755),
('Project73','G1000','2017.06',3000),
('Project79','G1000','2017.06',7993.3),
('Project80','G1000','2017.06',250000),
('Project104','G1000','2017.06',125000),
('Project110','G1000','2017.06',94714.5),
('Project118','G1000','2017.06',50000),
('Project115','G1000','2017.06',25000),
('Project15','G1000','2017.06',46000),
('Project16','G1000','2017.06',57639.53),
('Project58','G1000','2017.06',100000),
('Project17','G1000','2017.06',116003),
('Project63','G1000','2017.06',239148.28),
('Project126','G1000','2017.06',25000),
('Project18','G1006','2017.06',71876.64),
('Project130','G1000','2017.06',92710.75),
('Project106','G1006','2017.06',19438),
('Project36','G1000','2017.06',207394.05),
('Project93','G1006','2017.06',50000),
('Project129','G1000','2017.06',29137.75),
('Project20','G1006','2017.06',19056),
('Project21','G1006','2017.06',50000),
('Project38','G1000','2017.06',43953.56),
('Project22','G1000','2017.06',158935.4),
('Project28','G1000','2017.06',49000),
('Project46','G1000','2017.06',44175.23),
('Project42','G1000','2017.06',905600),
('Project131','G1000','2017.06',181666.67),
('Project35','G1000','2017.06',81945.19),
('Project26','G1000','2017.06',10000),
('Project112','G1000','2017.06',20000),
('Project85','G1006','2017.06',40000),
('Project92','G1006','2017.06',67143),
('Project113','G1000','2017.06',90000),
('Project83','G1006','2017.06',5000),
('Project29','G1005','2017.06',45000),
('Project103','G1000','2017.06',37500),
('Project87','G1006','2017.06',20000),
('Project121','G1000','2017.06',75000),
('Project119','G1000','2017.06',5000),
('Project120','G1000','2017.06',3000),
('Project123','G1000','2017.06',75000),
('Project122','G1000','2017.06',15000),
('Project124','G1000','2017.06',15000),
('Project125','G1000','2017.06',3000),
('Project47','G1000','2017.06',15160),
('Project107','G1000','2017.06',27000),
('Project69','G1006','2017.06',22550),
('Project70','G1000','2017.06',30000),
('Project102','G1006','2017.06',86059.05),
('Project78','G1006','2017.06',98515),
('Project51','G1000','2017.09',60000),
('Project7','G1000','2017.09',1903395.51),
('Project8','G1000','2017.09',117317.6),
('Project65','G1000','2017.09',36573.78),
('Project9','G1000','2017.09',192479.65),
('Project10','G1000','2017.09',42268.65),
('Project11','G1000','2017.09',16745),
('Project34','G1000','2017.09',75000),
('Project48','G1000','2017.09',75000),
('Project73','G1000','2017.09',3000),
('Project80','G1000','2017.09',150000),
('Project104','G1000','2017.09',100000),
('Project110','G1000','2017.09',78928.75),
('Project118','G1000','2017.09',75000),
('Project114','G1000','2017.09',125000),
('Project115','G1000','2017.09',50000),
('Project117','G1000','2017.09',150000),
('Project116','G1000','2017.09',40000),
('Project15','G1000','2017.09',25000),
('Project58','G1000','2017.09',100000),
('Project17','G1000','2017.09',97372.66),
('Project63','G1000','2017.09',115052.53),
('Project72','G1000','2017.09',100000),
('Project126','G1000','2017.09',25000),
('Project130','G1000','2017.09',92710.75),
('Project36','G1000','2017.09',207394.05),
('Project93','G1006','2017.09',100780),
('Project129','G1000','2017.09',29137.75),
('Project20','G1006','2017.09',25000),
('Project38','G1000','2017.09',47953.56),
('Project22','G1000','2017.09',700641.24),
('Project66','G1000','2017.09',9631.35),
('Project131','G1000','2017.09',181666.67),
('Project112','G1000','2017.09',30000),
('Project85','G1006','2017.09',10000),
('Project92','G1006','2017.09',52143),
('Project113','G1000','2017.09',100000),
('Project29','G1005','2017.09',25000),
('Project84','G1006','2017.09',80604),
('Project103','G1000','2017.09',37500),
('Project87','G1006','2017.09',20000),
('Project121','G1000','2017.09',75000),
('Project119','G1000','2017.09',10000),
('Project123','G1000','2017.09',75000),
('Project122','G1000','2017.09',35000),
('Project124','G1000','2017.09',30000),
('Project125','G1000','2017.09',17000),
('Project47','G1000','2017.09',30520),
('Project107','G1000','2017.09',28000),
('Project69','G1006','2017.09',48389),
('Project82','G1006','2017.09',42382),
('Project102','G1006','2017.09',86059.05),
('Project78','G1006','2017.09',32839),
('Project5','G1000','2017.09',50858.4),
('Project7','G1000','2017.12',1843590.45),
('Project8','G1000','2017.12',36933),
('Project65','G1000','2017.12',18286.96),
('Project10','G1000','2017.12',792277.82),
('Project11','G1000','2017.12',15000),
('Project34','G1000','2017.12',75000),
('Project45','G1000','2017.12',308237.74),
('Project48','G1000','2017.12',75000),
('Project73','G1000','2017.12',3000),
('Project80','G1000','2017.12',150000),
('Project104','G1000','2017.12',100000),
('Project118','G1000','2017.12',150000),
('Project114','G1000','2017.12',125000),
('Project115','G1000','2017.12',75000),
('Project117','G1000','2017.12',150000),
('Project116','G1000','2017.12',80000),
('Project15','G1000','2017.12',31000),
('Project16','G1000','2017.12',9006.17),
('Project58','G1000','2017.12',100000),
('Project31','G1000','2017.12',41428.41),
('Project17','G1000','2017.12',54301.94),
('Project63','G1000','2017.12',55555.63),
('Project72','G1000','2017.12',200000),
('Project126','G1000','2017.12',25000),
('Project19','G1000','2017.12',561577.32),
('Project130','G1000','2017.12',92710.75),
('Project106','G1006','2017.12',4900),
('Project36','G1000','2017.12',224050.93),
('Project129','G1000','2017.12',29137.75),
('Project20','G1006','2017.12',25000),
('Project86','G1000','2017.12',2000),
('Project21','G1006','2017.12',50000),
('Project38','G1000','2017.12',63851.19),
('Project22','G1000','2017.12',125000),
('Project24','G1006','2017.12',50000),
('Project46','G1000','2017.12',44175.23),
('Project42','G1000','2017.12',59921),
('Project131','G1000','2017.12',181666.67),
('Project26','G1000','2017.12',10000),
('Project112','G1000','2017.12',50000),
('Project85','G1006','2017.12',45000),
('Project92','G1006','2017.12',52143),
('Project113','G1000','2017.12',100000),
('Project83','G1006','2017.12',5000),
('Project41','G1000','2017.12',500),
('Project29','G1005','2017.12',20000),
('Project84','G1006','2017.12',67916),
('Project103','G1000','2017.12',37500),
('Project87','G1006','2017.12',10000),
('Project121','G1000','2017.12',75000),
('Project119','G1000','2017.12',25000),
('Project123','G1000','2017.12',100000),
('Project122','G1000','2017.12',30000),
('Project124','G1000','2017.12',15000),
('Project125','G1000','2017.12',10000),
('Project47','G1000','2017.12',21400),
('Project102','G1006','2017.12',86059.05),
('Project78','G1006','2017.12',22000),
('Project5','G1000','2017.12',60394.35),
('Project51','G1000','2018.12',80000),
('Project7','G1000','2018.12',6899543.92),
('Project8','G1000','2018.12',81123.9),
('Project65','G1000','2018.12',105950.62),
('Project11','G1000','2018.12',31007),
('Project34','G1000','2018.12',150000),
('Project48','G1000','2018.12',100000),
('Project104','G1000','2018.12',100000),
('Project118','G1000','2018.12',525000),
('Project115','G1000','2018.12',150000),
('Project117','G1000','2018.12',250000),
('Project116','G1000','2018.12',80000),
('Project16','G1000','2018.12',60576.98),
('Project58','G1000','2018.12',120000),
('Project31','G1000','2018.12',141714.83),
('Project17','G1000','2018.12',551764.83),
('Project63','G1000','2018.12',586148.48),
('Project72','G1000','2018.12',360000),
('Project126','G1000','2018.12',50000),
('Project19','G1000','2018.12',326584.77),
('Project130','G1000','2018.12',370843),
('Project36','G1000','2018.12',846233.08),
('Project129','G1000','2018.12',116551),
('Project20','G1006','2018.12',70000),
('Project21','G1006','2018.12',400000),
('Project38','G1000','2018.12',120000),
('Project22','G1000','2018.12',930069.86),
('Project24','G1006','2018.12',287500),
('Project46','G1000','2018.12',13382.28),
('Project42','G1000','2018.12',533701),
('Project131','G1000','2018.12',545000),
('Project112','G1000','2018.12',200000),
('Project29','G1005','2018.12',150000),
('Project84','G1006','2018.12',214133),
('Project128','G1000','2018.12',75000),
('Project82','G1006','2018.12',84764),
('Project102','G1006','2018.12',388942.2),
('Project5','G1000','2018.12',144310.71),
('Project51','G1000','2019.12',60000),
('Project7','G1000','2019.12',4782397.34),
('Project31','G1000','2019.12',78014.19),
('Project17','G1000','2019.12',522097.43),
('Project63','G1000','2019.12',504668.12),
('Project72','G1000','2019.12',244500),
('Project19','G1000','2019.12',600528.16),
('Project36','G1000','2019.12',190405.42),
('Project20','G1006','2019.12',70000),
('Project21','G1006','2019.12',500000),
('Project38','G1000','2019.12',180000),
('Project22','G1000','2019.12',973906.04),
('Project24','G1006','2019.12',500000),
('Project42','G1000','2019.12',335626),
('Project112','G1000','2019.12',200000),
('Project29','G1005','2019.12',150000),
('Project128','G1000','2019.12',75000),
('Project7','G1000','2020.12',1449182.69),
('Project17','G1000','2020.12',522097.43),
('Project63','G1000','2020.12',473304.12),
('Project72','G1000','2020.12',244500),
('Project19','G1000','2020.12',352075.36),
('Project36','G1000','2020.12',387872.15),
('Project20','G1006','2020.12',20000),
('Project21','G1006','2020.12',500000),
('Project38','G1000','2020.12',180000),
('Project22','G1000','2020.12',350673.36),
('Project24','G1006','2020.12',600000),
('Project42','G1000','2020.12',35952),
('Project29','G1005','2020.12',150000),
('Project17','G1000','2021.12',522097.43),
('Project63','G1000','2021.12',457054.12),
('Project72','G1000','2021.12',244500),
('Project19','G1000','2021.12',648372.55),
('Project21','G1006','2021.12',500000),
('Project24','G1006','2021.12',600000)

非常感谢您的帮助。

【问题讨论】：

标签： sql-server-2008 tsql

【解决方案1】：

起初我想用动态 SQL 来做这件事，但我认为你可以用静态来做

您想要做的是透视和聚合。由于它是一个高度专业化的支点，我不会尝试使用 Pivot 命令来完成它。所以我通过使用聚合和分组来进行透视。

这是我的尝试。我无法填写 UPDATEID 和 DTSTMp，而且 plankey 显然必须同时使用 project_id 和 proj_id 来制作，而您只提供了 proj_id，但除此之外，我认为这应该可以为您提供一些帮助：

select
    b.FOLDERKEY + a.PROJ_ID PLANKEY
    ,b.FOLDERNAME
    ,a.PROJ_ID
    ,a.ACT_ID
    ,sum(case when b.Base_Month<=1 and cast(a.fc_date+'.01' as date)=dateadd(month,0,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_JAN
    ,sum(case when b.Base_Month<=2 and cast(a.fc_date+'.01' as date)=dateadd(month,1,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_FEB
    ,sum(case when b.Base_Month<=3 and cast(a.fc_date+'.01' as date)=dateadd(month,2,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_MAR
    ,sum(case when b.Base_Month<=4 and cast(a.fc_date+'.01' as date)=dateadd(month,3,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_APR
    ,sum(case when b.Base_Month<=5 and cast(a.fc_date+'.01' as date)=dateadd(month,4,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_MAY
    ,sum(case when b.Base_Month<=6 and cast(a.fc_date+'.01' as date)=dateadd(month,5,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_JUN
    ,sum(case when b.Base_Month<=7 and cast(a.fc_date+'.01' as date)=dateadd(month,6,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_JUL
    ,sum(case when b.Base_Month<=8 and cast(a.fc_date+'.01' as date)=dateadd(month,7,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_AUG
    ,sum(case when b.Base_Month<=9 and cast(a.fc_date+'.01' as date)=dateadd(month,8,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_SEP
    ,sum(case when b.Base_Month<=10 and cast(a.fc_date+'.01' as date)=dateadd(month,9,b.base_start) then a.AMT_USD else 0 end)  Y1_ACT_OCT
    ,sum(case when b.Base_Month<=11 and cast(a.fc_date+'.01' as date)=dateadd(month,10,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_NOV
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,11,b.base_start) then a.AMT_USD else 0 end) Y1_ACT_DEC
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,12,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_JAN
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,13,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_FEB
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,14,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_MAR
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,15,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_APR
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,16,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_MAY
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,17,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_JUN
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,18,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_JUL
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,19,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_AUG
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,20,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_SEP
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,21,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_OCT
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,22,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_NOV
    ,sum(case when cast(a.fc_date+'.01' as date)=dateadd(month,23,b.base_start) then a.AMT_USD else 0 end) Y2_ACT_DEC
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+2 then a.AMT_USD else 0 end) [Y3_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+3 then a.AMT_USD else 0 end) [Y4_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+4 then a.AMT_USD else 0 end) [Y5_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+5 then a.AMT_USD else 0 end) [Y6_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+6 then a.AMT_USD else 0 end) [Y7_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+7 then a.AMT_USD else 0 end) [Y8_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+8 then a.AMT_USD else 0 end) [Y9_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+9 then a.AMT_USD else 0 end) [Y10_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+10 then a.AMT_USD else 0 end) [Y11_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+11 then a.AMT_USD else 0 end) [Y12_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+12 then a.AMT_USD else 0 end) [Y13_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+13 then a.AMT_USD else 0 end) [Y14_FC]
    ,  sum(case when year(cast(a.fc_date+'.01' as date))=b.Base_Year+14 then a.AMT_USD else 0 end) [Y15_FC]
from [dbo].[STG_fcst] a
inner join (select FOLDERKEY,FOLDERNAME,FCST_BASE_DATE,CTR_STOP,year(FCST_BASE_DATE) Base_Year,dateadd(year,datediff(year,0,FCST_BASE_DATE),0) base_start,month(FCST_BASE_DATE) Base_Month from dbo.FOLDER_FCST_DT_XREF_VW) b
on
-- b.FOLDERKEY='AB05'and 
cast(a.FC_DATE+'.01' as date)>=b.FCST_BASE_DATE
group by b.FOLDERKEY + a.PROJ_ID 
,b.FOLDERNAME
    ,a.PROJ_ID
    ,a.ACT_ID
order by PROJ_ID,PLANKEY

有两件事使它变得更复杂一些。我必须将 FC_DATE 转换为一个日期，而不是仅使用计划中的 BASE_DATE，而是进行子选择，将基准月份计算为 int，以及基准年的开始，例如 2015 年 1 月 1 日。

使用这些信息我可以填写所有列

Y1 Jan 仅当基月为 1 月时才会聚合基准年中具有 1 月日期的所有行。 Y1 Feb 聚合基准年 2 月日期的所有行，仅当基准月为 1 月或 2 月时 ... Y2 Jan 聚合基准年之后一年中具有 1 月日期的所有行 ... Y2 Dec 聚合基准年之后一年中 12 月日期的所有行

Y3_FC 聚合所有日期在基准年 + 2 的年份 ... Y15_FC 聚合所有日期在基准年 + 14 的年份

【讨论】：