如何根据另一个表的 MIN/MAX 填充日期表中的缺失行

Question

我有一个项目预测表，其中每一行代表一个月/一个财务期

select 
2210004 as ProjectID, 
count(*) as aRowCount, 
min(finperiod) as earliest, 
max(FinPeriod) as latest 
from F where ProjectID = 22100004

ProjectID   aRowCount   earliest    latest
2210004     87          2018-09-30  2026-06-30

我有一个日历表，跨越 50 年，其中每一行代表一个月/一个财务期

DECLARE @StartDateTime DATETIME
DECLARE @EndDateTime DATETIME

SET @StartDateTime = '2010-07-01'
SET @EndDateTime = '2060-06-30';

WITH DateRange(DateData) AS 
(
    SELECT @StartDateTime as Date
    UNION ALL
    SELECT DATEADD(M,1,DateData)
    FROM DateRange 
    WHERE DateData < @EndDateTime
)
SELECT eomonth(DateData) as FinPeriod
into dbo.CalendarMonths
FROM DateRange
OPTION (MAXRECURSION 0)
GO

现在我需要解决的问题是预测有时会有差距。 例如，对于特定的 ProjectID，2021 年 1 月或 2021 年 2 月可能没有任何内容。这是我要创建的最终结果。

FinPeriod   ProjectID   FinPeriod
2020-12-31  22100004    2020-12-31
2021-01-31  NULL        NULL
2021-02-28  NULL        NULL
2021-03-31  22100004    2021-03-31
2021-04-30  22100004    2021-04-30
2021-05-31  NULL        NULL
2021-06-30  22100004    2021-06-30
2021-07-31  NULL        NULL
2021-08-31  NULL        NULL
2021-09-30  22100004    2021-09-30

上面的这张表是我想要创建的。 这是原始预测表，但每个财务期都有行。

这段代码可以完成这项工作

select 
    CM.FinPeriod, f.ProjectID, f.FinPeriod
from 
    dbo.CalendarMonths CM 
    
    LEFT JOIN (select ProjectID, finperiod from f where ProjectID=22100004 )  F 
        ON CM.FinPeriod = f.FinPeriod

group by 
    cm.FinPeriod, f.ProjectID, f.FinPeriod

having CM.FinPeriod between '2018-09-30' and '2026-06-30'

但问题是：

1. 当我在连接中取出 ProjectID 过滤器，并在having语句中更改过滤条件时，它似乎破坏了 LEFT JOIN 并且我丢失了 NULLS
2. 而且我不希望每个 ProjectID 都有每个日历月（价值 50 年）

所以这不起作用

select 
    CM.FinPeriod, f.ProjectID, f.FinPeriod
from 
    dbo.CalendarMonths CM LEFT JOIN F 
        ON CM.FinPeriod = f.FinPeriod
where 
    ProjectID=22100004
    
group by 
    cm.FinPeriod, f.ProjectID, f.FinPeriod

having 
    CM.FinPeriod >= MIN(F.FinPeriod) and CM.FinPeriod <= MAX(F.FinPeriod) 

order by 
    ProjectID, cm.FinPeriod

问题似乎是having声明，但我看不出问题是什么。

SQL 服务器 2019

这是示例数据

CREATE TABLE [F](
    [ProjectID] [bigint] NULL,
    [FiscalYear] [bigint] NULL,
    [CalendarYear] [bigint] NULL,
    [FinPeriod] [date] NULL,
    [MonthOf] [varchar](max) NULL,
    [PlannedSpend] [float] NULL,
    [Actual] [float] NULL,
    [Forecast] [float] NULL,
    [CumulativePlannedSpend] [float] NULL,
    [CumulativeActual] [float] NULL,
    [CumulativeForecast] [float] NULL,
    [EstimatedCostAtCompletion] [float] NULL,
    [VarianceDollars] [float] NULL,
    [VariancePercentage] [float] NULL,
    [VarianceUnderControl] [float] NULL
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
GO

    
    
   
INSERT [F] ([ProjectID], [FiscalYear], [CalendarYear], [FinPeriod], [MonthOf], [PlannedSpend], [Actual], [Forecast], [CumulativePlannedSpend], [CumulativeActual], [CumulativeForecast], [EstimatedCostAtCompletion], [VarianceDollars], [VariancePercentage], [VarianceUnderControl]) VALUES (22100004, 2023, 2022, CAST(N'2022-08-31' AS Date), N'AUG 2022', 0, 24735, 0, 2215753.48, 1397015.48, NULL, 1397015.48, 818738, 0.37, 0)
INSERT [F] ([ProjectID], [FiscalYear], [CalendarYear], [FinPeriod], [MonthOf], [PlannedSpend], [Actual], [Forecast], [CumulativePlannedSpend], [CumulativeActual], [CumulativeForecast], [EstimatedCostAtCompletion], [VarianceDollars], [VariancePercentage], [VarianceUnderControl]) VALUES (22100004, 2023, 2022, CAST(N'2022-09-30' AS Date), N'SEP 2022', 0, 4685, 0, 2215753.48, 1401700.48, NULL, 1401700.48, 814053, 0.367, 0)
INSERT [F] ([ProjectID], [FiscalYear], [CalendarYear], [FinPeriod], [MonthOf], [PlannedSpend], [Actual], [Forecast], [CumulativePlannedSpend], [CumulativeActual], [CumulativeForecast], [EstimatedCostAtCompletion], [VarianceDollars], [VariancePercentage], [VarianceUnderControl]) VALUES (22100004, 2023, 2022, CAST(N'2022-12-31' AS Date), N'DEC 2022', 5000, 0, 5000, 2220753.48, NULL, 5000, 1406700.48, 814053, 0.367, 0)
INSERT [F] ([ProjectID], [FiscalYear], [CalendarYear], [FinPeriod], [MonthOf], [PlannedSpend], [Actual], [Forecast], [CumulativePlannedSpend], [CumulativeActual], [CumulativeForecast], [EstimatedCostAtCompletion], [VarianceDollars], [VariancePercentage], [VarianceUnderControl]) VALUES (22100004, 2023, 2023, CAST(N'2023-01-31' AS Date), N'JAN 2023', 5000, 0, 5000, 2225753.48, NULL, 10000, 1411700.48, 814053, 0.366, 0)
INSERT [F] ([ProjectID], [FiscalYear], [CalendarYear], [FinPeriod], [MonthOf], [PlannedSpend], [Actual], [Forecast], [CumulativePlannedSpend], [CumulativeActual], [CumulativeForecast], [EstimatedCostAtCompletion], [VarianceDollars], [VariancePercentage], [VarianceUnderControl]) VALUES (22100004, 2023, 2023, CAST(N'2023-02-28' AS Date), N'FEB 2023', 10000, 0, 10000, 2235753.48, NULL, 20000, 1421700.48, 814053, 0.364, 0)
INSERT [F] ([ProjectID], [FiscalYear], [CalendarYear], [FinPeriod], [MonthOf], [PlannedSpend], [Actual], [Forecast], [CumulativePlannedSpend], [CumulativeActual], [CumulativeForecast], [EstimatedCostAtCompletion], [VarianceDollars], [VariancePercentage], [VarianceUnderControl]) VALUES (22100004, 2023, 2023, CAST(N'2023-03-31' AS Date), N'MAR 2023', 150000, 0, 150000, 2385753.48, NULL, 170000, 1571700.48, 814053, 0.341, 0)
INSERT [F] ([ProjectID], [FiscalYear], [CalendarYear], [FinPeriod], [MonthOf], [PlannedSpend], [Actual], [Forecast], [CumulativePlannedSpend], [CumulativeActual], [CumulativeForecast], [EstimatedCostAtCompletion], [VarianceDollars], [VariancePercentage], [VarianceUnderControl]) VALUES (22100004, 2023, 2023, CAST(N'2023-05-31' AS Date), N'MAY 2023', 200000, 0, 200000, 2735753.48, NULL, 520000, 1921700.48, 814053, 0.298, 0)