Sql server 如何按最近6个月的间隔计算组数？

我正试着每隔6个月计算一次，我有整整一年的时间，我需要像这样：

这不是代码

IdEmpresa = CompanyID
CompanyID = 1 / MONTH(1 TO 6) / YEAR 2019
CompanyID = 1 / MONTH(7 TO 12) / YEAR 2019
CompanyID = 2 / MONTH(1 TO 6) / YEAR 2019 
CompanyID = 2 / MONTH(7 TO 12) / YEAR 2019
CompanyID = 1 / MONTH(1 TO 6) / YEAR 2020
CompanyID = 1 / MONTH(7 TO 12) / YEAR 2020

继续下去，总是每隔6个月

把这个时间间隔的计数拿来，正如你在我试图用的img吼叫中所看到的：

COUNT(C.Id) OVER (PARTITION BY YEAR(P.DATACADASTRO), MONTH(P.DATACADASTRO), C.IdEmpresa) AS PP

在我把它放到CTE表达式中之后，你可以在下面的公式中看到 然而，我不能带来正确的结果

WITH SUP AS 
(
SELECT DISTINCT C.Id AS IdCarro, C.Placa, P.DataCadastro,
MONTH(P.DATACADASTRO) AS MONTH, YEAR(P.DATACADASTRO) AS YEARS, C.IdEmpresa,
CASE 
WHEN P.DataCadastro < DATEADD(YEAR,-1,GETDATE())
THEN '>1 YEAR'
WHEN P.DataCadastro >= DATEADD(YEAR,-1,GETDATE())
THEN '<=1 YEAR'
ELSE 'NOT FOUND'
END AS WHOLE_YEAR,
        
CONCAT(C.IdEmpresa, YEAR(P.DATACADASTRO), MONTH(P.DATACADASTRO), c.IdEmpresa) AS KEY_SUP_Carro,
COUNT(C.Id) OVER (PARTITION BY  DATEADD(MONTH,3,GETDATE())) AS SEMESTER,
COUNT(C.Id) OVER (PARTITION BY YEAR(P.DATACADASTRO), MONTH(P.DATACADASTRO)) AS PP
        
FROM Pedido P WITH (NOLOCK) 
INNER JOIN Carro C WITH (NOLOCK) ON P.IdCarro = C.Id 
AND C.Placa NOT IN ('') AND C.Ativo = 1 AND C.IdEmpresa IN (1, 24, 26, 27)
        
)
SELECT COUNT(IdCarro) AS Contagem, MONTH, YEARS, IdEmpresa, WHOLE_YEAR, KEY_SUP_Carro, 
SEMESTER, PP
       
FROM SUP
GROUP BY MONTH, YEARS, IdEmpresa, WHOLE_YEAR, KEY_SUP_Carro, SEMESTER, PP
        
HAVING WHOLE_YEAR = '<=1 YEAR'
ORDER BY IdEmpresa, YEARS, MONTH DESC

带有SUP AS
(
选择不同的C.Id，如IdCarro、C.Placa、P.DataCadastro、，
月（P.DATACADASTRO）表示月，年（P.DATACADASTRO）表示年，C.IdEmpresa，
案例
当P.DataCadastro=DATEADD（年份，-1，GETDATE（））
然后我就这样解决了：
只是在我的分区中添加了一个“case”，用来计算我的ID

```COUNT(C.Id) OVER (PARTITION BY YEAR(P.DATACADASTRO),
CASE 
WHEN MONTH(P.DATACADASTRO) >= 1 AND MONTH(P.DATACADASTRO) <= 6
THEN 1
WHEN MONTH(P.DATACADASTRO) >= 7 AND MONTH(P.DATACADASTRO) <= 12
THEN 2
END, C.IdEmpresa) AS PULSE_IdCarro```

``按年份划分的分区计数（C.Id）（P.DATACADASTRO），
案例
当MONTH（P.DATACADASTRO）>=1，MONTH（P.DATACADASTRO）=7，MONTH（P.DATACADASTRO）@DaleK感谢您的陈述，正如您所说：）