创建按月增量添加个人数量的列

Question

我有从数据库查询的人口普查数据。最终，我将把他放在一张excel枢轴图中。我试图根据他们的opens_date计算总人数（case_num），并且必须在过去的6个月内显示总人数。换句话说，本月第一天的总人口普查是多少。我唯一能做的就是根据Month列计算并显示对程序不熟悉的人数。

以下是我到目前为止编写的代码

IF (OBJECT_ID('tempdb..#CEN') IS NOT NULL) DROP TABLE #CEN;
IF (OBJECT_ID('tempdb..#CENX') IS NOT NULL) DROP TABLE #CENX;

SELECT CASE_NUM,LAST_NAME,FIRST_NAME,CDASSIGN.UNIT_ID,SUB_UNIT_ID,CAUNIT.    [DESC],DATE_OPENED,DATE_CLOSED,SUBSTRING(CAST(DATE_OPENED AS NVARCHAR(30)),1,3) 
+ '-' + SUBSTRING(CAST(DATE_OPENED AS NVARCHAR(30)),8,4) AS [DATE],
       SUBSTRING(CAST(DATE_OPENED AS NVARCHAR(30)),1,3) AS [MONTH],
       SUBSTRING(CAST(DATE_OPENED AS NVARCHAR(30)),7,5) AS [YEAR],

CASE WHEN DATE_CLOSED = '1753-01-01' THEN GETDATE()
WHEN DATE_CLOSED <> '1753-01-01' THEN DATE_CLOSED
END AS REAL_DATE_CLOSED,

CASE WHEN UNIT_ID IN (2802,2803) THEN 'QM'
    WHEN UNIT_ID = 2801 THEN 'Treatment'
    WHEN UNIT_ID = 3602 THEN 'Emer'
    WHEN UNIT_ID NOT IN (2801,2802,2803,3602) THEN [DESC]
    END AS [PROGRAM_NAME]

INTO #CEN
FROM CDASSIGN
INNER JOIN CDCLIENT ON CDASSIGN.CLIENT_ID = CDCLIENT.ID
INNER JOIN CAUNIT ON CAUNIT.ID = CDASSIGN.UNIT_ID
WHERE UNIT_ID IN (4141)
AND DATE_OPENED >= '1970-01-01'
AND DATE_CLOSED = '1753-01-01'
AND CDASSIGN.VOID_FLAG IS NULL
AND SUB_UNIT_ID IN (111)
ORDER BY CASE_NUM ASC

SELECT *, CONVERT(int,REAL_DATE_CLOSED) - CONVERT(INT,DATE_OPENED) AS     DAYS_IN_PROGRAM
INTO #CENX
FROM #CEN

SELECT CASE_NUM,LAST_NAME,FIRST_NAME,UNIT_ID,SUB_UNIT_ID,    [DESC],DATE_OPENED,DATE_CLOSED,[MONTH],[YEAR],REAL_DATE_CLOSED,    [PROGRAM_NAME],DAYS_IN_PROGRAM
FROM #CENX