SSMS SQL - PIVOT 中的 AVG 返回总数，而不是平均值答案

【问题标题】：SSMS SQL - AVG in PIVOT returning totals, not averagesSSMS SQL - PIVOT 中的 AVG 返回总数，而不是平均值
【发布时间】：2017-11-10 20:02:55
【问题描述】：

好的，这个很难。我确信使用 PIVOT 语句是答案，但我的知识不足以形成正确的查询。我认为 AVG 也让我陷入了困境。

我正在寻找每个月的总费用/当月活跃的会员数量

我有一个查询将准确返回我想要的结果，但它以每行一个月周期的形式给出结果，我想要以月周期作为列标题的单行平均值。

我已经获得了创建动态查询的方法，以指定用于列标题以及在查询的 SELECT 和 PIVOT 语句中使用的必要字段，并且效果很好，但是，查询似乎只是提供了该期间付款的SUM，而不是平均。

在下面的代码中，第一个查询（即 CTE 查询）的结果包含正确的信息，但作为行而不是列。本质上，我需要能够对数据进行透视，以提供每月期间 (Eff_Period) 作为列标题，并将特定期间的平均成本 (Clms_PMPM) 作为列的值。

这是整个查询，其中声明并填充了示例临时表以供在其中使用（我希望我做对了）；

--------------------
/*
   Create member table.
*/
CREATE TABLE #Mbr_Data
   (
   Member_Name nvarchar(50) NULL,
   MemberID nvarchar(4) NULL,
   Eff_Period nvarchar(6) NULL,
   );
--------------------
/*
   Create claim table.
*/
CREATE TABLE #Clm_Data
   (
   Clm_Dt date NULL,
   Clm_Amt money NULL,
   Mbr_ID nvarchar(6) NULL,
   );
--------------------
/*
   Populate member table.
*/
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201601');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201602');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201603');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201604');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201605');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201606');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201607');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201608');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201609');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201610');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201611');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201612');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201701');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201702');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201703');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201704');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201705');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201706');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201707');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201708');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201709');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201710');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201711');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201712');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201607');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201608');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201609');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201610');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201611');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201612');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201701');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201702');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201703');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201704');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201705');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201706');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201707');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201708');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201709');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201710');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201711');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201712');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201601');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201602');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201603');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201604');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201605');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201606');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201607');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201608');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201609');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201610');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201611');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201612');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201701');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201702');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201703');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201704');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201705');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201706');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201607');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201608');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201609');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201610');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201611');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201612');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201701');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201702');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201703');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201704');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201602');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201603');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201604');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201605');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201606');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201607');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201608');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201609');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201610');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201707');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201708');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201709');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201710');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201711');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201712');
--------------------
/*
   Populate claim table.
*/
INSERT INTO #Clm_Data VALUES ('2017-02-27', '523.37', '0004');
INSERT INTO #Clm_Data VALUES ('2016-08-24', '815.58', '0005');
INSERT INTO #Clm_Data VALUES ('2017-01-08', '541.91', '0004');
INSERT INTO #Clm_Data VALUES ('2016-12-08', '775.45', '0004');
INSERT INTO #Clm_Data VALUES ('2016-08-12', '177.44', '0003');
INSERT INTO #Clm_Data VALUES ('2017-01-19', '253.02', '0003');
INSERT INTO #Clm_Data VALUES ('2017-05-12', '539.29', '0003');
INSERT INTO #Clm_Data VALUES ('2016-08-23', '86.85', '0002');
INSERT INTO #Clm_Data VALUES ('2017-11-24', '869.67', '0002');
INSERT INTO #Clm_Data VALUES ('2016-10-15', '263.96', '0004');
INSERT INTO #Clm_Data VALUES ('2017-08-21', '111.27', '0001');
INSERT INTO #Clm_Data VALUES ('2016-06-17', '716.69', '0003');
INSERT INTO #Clm_Data VALUES ('2017-06-21', '754.21', '0002');
INSERT INTO #Clm_Data VALUES ('2016-06-12', '330.57', '0001');
INSERT INTO #Clm_Data VALUES ('2016-04-11', '770.02', '0001');
INSERT INTO #Clm_Data VALUES ('2016-07-13', '629', '0002');
INSERT INTO #Clm_Data VALUES ('2016-08-22', '876.02', '0001');
INSERT INTO #Clm_Data VALUES ('2017-03-21', '72.06', '0005');
INSERT INTO #Clm_Data VALUES ('2017-02-13', '249.11', '0005');
INSERT INTO #Clm_Data VALUES ('2017-08-13', '922.89', '0002');
INSERT INTO #Clm_Data VALUES ('2017-03-29', '760.59', '0003');
INSERT INTO #Clm_Data VALUES ('2017-01-10', '901.51', '0002');
INSERT INTO #Clm_Data VALUES ('2016-02-04', '432.17', '0003');
INSERT INTO #Clm_Data VALUES ('2017-02-14', '628.23', '0003');
INSERT INTO #Clm_Data VALUES ('2017-08-08', '718.05', '0002');
INSERT INTO #Clm_Data VALUES ('2016-12-28', '931.81', '0004');
INSERT INTO #Clm_Data VALUES ('2016-10-10', '973.44', '0002');
INSERT INTO #Clm_Data VALUES ('2017-08-26', '910.89', '0005');
INSERT INTO #Clm_Data VALUES ('2017-03-09', '613.04', '0004');
INSERT INTO #Clm_Data VALUES ('2017-07-14', '490.26', '0002');
INSERT INTO #Clm_Data VALUES ('2017-02-23', '941.18', '0005');
INSERT INTO #Clm_Data VALUES ('2017-06-19', '506.74', '0005');
INSERT INTO #Clm_Data VALUES ('2016-08-04', '970.9', '0001');
INSERT INTO #Clm_Data VALUES ('2016-11-13', '205.61', '0004');
INSERT INTO #Clm_Data VALUES ('2017-03-12', '580.84', '0002');
INSERT INTO #Clm_Data VALUES ('2016-09-25', '661.63', '0002');
INSERT INTO #Clm_Data VALUES ('2016-07-14', '391.89', '0004');
INSERT INTO #Clm_Data VALUES ('2016-12-16', '353.55', '0002');
INSERT INTO #Clm_Data VALUES ('2016-04-04', '284.09', '0005');
INSERT INTO #Clm_Data VALUES ('2016-07-16', '479.56', '0003');
INSERT INTO #Clm_Data VALUES ('2016-09-28', '276.65', '0002');
INSERT INTO #Clm_Data VALUES ('2016-08-06', '145.05', '0004');
INSERT INTO #Clm_Data VALUES ('2016-09-14', '947.97', '0001');
INSERT INTO #Clm_Data VALUES ('2016-09-24', '18.18', '0003');
INSERT INTO #Clm_Data VALUES ('2017-06-14', '489.54', '0001');
INSERT INTO #Clm_Data VALUES ('2017-08-06', '260.04', '0005');
INSERT INTO #Clm_Data VALUES ('2016-09-02', '224.2', '0001');
INSERT INTO #Clm_Data VALUES ('2017-12-23', '301.42', '0005');
INSERT INTO #Clm_Data VALUES ('2016-10-05', '636.12', '0004');
INSERT INTO #Clm_Data VALUES ('2017-06-26', '126.39', '0002');
INSERT INTO #Clm_Data VALUES ('2016-12-18', '156.15', '0001');
INSERT INTO #Clm_Data VALUES ('2016-11-21', '425.58', '0004');
INSERT INTO #Clm_Data VALUES ('2016-04-29', '619.03', '0001');
INSERT INTO #Clm_Data VALUES ('2016-07-07', '847.73', '0003');
INSERT INTO #Clm_Data VALUES ('2016-12-17', '143.94', '0001');
INSERT INTO #Clm_Data VALUES ('2016-02-24', '897.7', '0001');
INSERT INTO #Clm_Data VALUES ('2017-02-08', '130.13', '0002');
INSERT INTO #Clm_Data VALUES ('2017-01-02', '400.07', '0001');
INSERT INTO #Clm_Data VALUES ('2017-03-26', '289.36', '0004');
INSERT INTO #Clm_Data VALUES ('2016-07-26', '193.25', '0003');
INSERT INTO #Clm_Data VALUES ('2017-03-27', '585.15', '0005');
INSERT INTO #Clm_Data VALUES ('2016-11-06', '885.48', '0002');
INSERT INTO #Clm_Data VALUES ('2016-12-30', '104.55', '0003');
INSERT INTO #Clm_Data VALUES ('2017-10-08', '554.54', '0002');
INSERT INTO #Clm_Data VALUES ('2017-04-15', '37.34', '0004');
INSERT INTO #Clm_Data VALUES ('2017-06-17', '742.19', '0002');
INSERT INTO #Clm_Data VALUES ('2016-11-23', '527.78', '0004');
INSERT INTO #Clm_Data VALUES ('2017-06-06', '116.95', '0002');
INSERT INTO #Clm_Data VALUES ('2016-09-13', '408.24', '0004');
INSERT INTO #Clm_Data VALUES ('2016-09-12', '520.77', '0002');
INSERT INTO #Clm_Data VALUES ('2017-04-03', '325', '0001');
INSERT INTO #Clm_Data VALUES ('2016-11-13', '16.53', '0005');
INSERT INTO #Clm_Data VALUES ('2016-07-06', '845.77', '0004');
INSERT INTO #Clm_Data VALUES ('2016-08-21', '604.06', '0003');
INSERT INTO #Clm_Data VALUES ('2017-06-12', '47', '0001');
INSERT INTO #Clm_Data VALUES ('2017-05-06', '778.23', '0001');
INSERT INTO #Clm_Data VALUES ('2017-06-03', '507.67', '0002');
INSERT INTO #Clm_Data VALUES ('2016-10-20', '572.65', '0003');
INSERT INTO #Clm_Data VALUES ('2017-06-30', '764.08', '0005');
INSERT INTO #Clm_Data VALUES ('2016-08-19', '153.46', '0001');
INSERT INTO #Clm_Data VALUES ('2016-08-26', '491.57', '0005');
INSERT INTO #Clm_Data VALUES ('2016-04-18', '673.71', '0001');
INSERT INTO #Clm_Data VALUES ('2016-07-15', '830.9', '0001');
INSERT INTO #Clm_Data VALUES ('2017-10-06', '688.26', '0005');
INSERT INTO #Clm_Data VALUES ('2016-04-25', '676.57', '0001');
INSERT INTO #Clm_Data VALUES ('2016-04-11', '622.61', '0003');
INSERT INTO #Clm_Data VALUES ('2016-11-04', '723.65', '0005');
INSERT INTO #Clm_Data VALUES ('2016-07-31', '579.48', '0005');
INSERT INTO #Clm_Data VALUES ('2017-03-03', '831.47', '0003');
INSERT INTO #Clm_Data VALUES ('2016-12-22', '568.48', '0002');
INSERT INTO #Clm_Data VALUES ('2016-05-29', '800.18', '0005');
INSERT INTO #Clm_Data VALUES ('2017-08-19', '439.59', '0005');
INSERT INTO #Clm_Data VALUES ('2016-08-07', '396.01', '0001');
INSERT INTO #Clm_Data VALUES ('2016-10-26', '538.43', '0004');
INSERT INTO #Clm_Data VALUES ('2017-07-04', '382.15', '0005');
INSERT INTO #Clm_Data VALUES ('2017-12-30', '126.15', '0005');
INSERT INTO #Clm_Data VALUES ('2016-10-30', '195.71', '0005');
INSERT INTO #Clm_Data VALUES ('2017-08-06', '446.5', '0001');
INSERT INTO #Clm_Data VALUES ('2016-10-06', '484.34', '0003');
INSERT INTO #Clm_Data VALUES ('2016-11-20', '254.37', '0004');
--------------------
/*
   CTE method.
*/
WITH
   Mbrs_CTE AS
      (
      SELECT
         Eff_Period,
         COUNT(DISTINCT MemberID) AS Mbr_Cnt
      FROM
         #Mbr_Data
      GROUP BY
         Eff_Period
      ),
   Clms_CTE AS
      (
      SELECT DISTINCT
         FORMAT(Clm_Dt, 'yyyyMM') AS Eff_Period,
         SUM(Clm_Amt) OVER (PARTITION BY FORMAT(Clm_Dt, 'yyyyMM')) AS Clm_Pmts
      FROM
         #Clm_Data
      )
   SELECT
      Mbrs.Eff_Period,
      Mbrs.Mbr_Cnt,
      Clm_S.Clm_Pmts,
      Clm_S.Clm_Pmts / Mbrs.Mbr_Cnt AS Clms_PMPM
   FROM
      Mbrs_CTE AS Mbrs
      JOIN Clms_CTE AS Clm_S
         ON Clm_S.Eff_Period = Mbrs.Eff_Period;
--------------------
/*
   Dynamic query method.
*/
DECLARE
   @columns NVARCHAR(MAX),
   @sql NVARCHAR(MAX);

SET @columns = '';

SELECT
   @columns += ',' + QUOTENAME(Eff_Period)
FROM
   (
   SELECT DISTINCT TOP 100 PERCENT
      Mbrs.Eff_Period
   FROM
      #Mbr_Data AS Mbrs
      INNER JOIN #Clm_Data AS Clms
         ON
            Mbrs.Eff_Period = FORMAT(Clms.Clm_Dt, 'yyyyMM')
            AND YEAR(Clms.Clm_Dt) = 2016
   ORDER BY
      Mbrs.Eff_Period
   ) AS Raw_Data
ORDER BY
   Eff_Period;

PRINT @columns


SET @sql =
   '
   WITH
      Mbrs_CTE AS
         (
         SELECT
            Eff_Period,
            COUNT(DISTINCT MemberID) AS Mbr_Cnt
         FROM
            #Mbr_Data
         GROUP BY
            Eff_Period
         ),
      Clms_CTE AS
         (
         SELECT
            Mbrs.Eff_Period,
            Mbrs.Mbr_Cnt,
            SUM(Clms.Clm_Amt) AS Sum_Amt
         FROM
            Mbrs_CTE AS Mbrs 
            LEFT OUTER JOIN #Clm_Data AS Clms
               ON
                  Mbrs.Eff_Period = FORMAT(Clms.Clm_Dt, ''yyyyMM'')
                  AND YEAR(Clms.Clm_Dt) = 2016
         GROUP BY
            Mbrs.Eff_Period,
            Mbrs.Mbr_Cnt
         )
      SELECT
         ' + STUFF(@columns, 1, 1, '') + '
      FROM
         (
         SELECT
            Clms.Eff_Period,
            Clms.sum_Amt
         FROM
            Mbrs_CTE AS Mbrs
            INNER JOIN Clms_CTE AS Clms
               ON Clms.Eff_Period = Mbrs.Eff_Period

         ) AS sor
      PIVOT
         (
         AVG(sum_Amt) FOR Eff_Period IN
            ('
            + STUFF(@columns, 1, 1, '')
            + ')
         ) AS pvt;
   ';
PRINT @sql;
EXEC sp_executesql @sql;
--------------------

第二个查询的形式是正确的，只是它似乎提供的是SUM，而不是AVG。

我不太需要答案，就像有人说的那样，“spoonfed”给我；只是在 PIVOT 查询中指出我做错了什么会有所帮助。

让我提前说，任何帮助将不胜感激。谢谢！

【问题讨论】：

其实那个编辑是错误的。在医疗保健行业，为提供者分配了一个价值，称为 PMPM。每个会员每月。它不是每个成员的值，而是查看每个成员为整个设施花费了多少的方法。因此，如果 10 月份的医疗保健费用为 200 美元，并且当月有 50 名活跃会员，则 PMPM 为 200 美元/50 美元，即 4 美元。它不是针对每个成员列出的，而是按医生、设施、医院以及正在确定其价值的实体分组。不过，重读我发布的内容，我可以更好地措辞。

标签： sql sql-server pivot ssms average

【解决方案1】：

编辑：提供结果集作为当月索赔平均值/会员计数的一种方式。

真是太棒了！如果我理解正确，我认为以下内容应该有助于指导您。无论当月是否提出索赔，它都会输出整个年份网格。

请注意，我删除了动态 sql 部分，因为我将该部分留给您来解释利用下面的旋转结果作为输入。我还在第二个 CTE 的特定年份过滤器中进行了硬编码，可以用变量轻松替换和/或使其更复杂以考虑月份、日期等。

;with memberClaimsByMonth as
(
    select
        m.MemberID as MemberId
        ,year(c.Clm_dt) as ClaimYear
        ,month(c.Clm_dt) as ClaimMonth
        ,c.Clm_Amt as ClaimAmount
    from
        #Mbr_Data m
    join
        #Clm_Data c
        on c.Mbr_ID = m.MemberID
),
memberAvgClaimByMonth as (
    select
        c.ClaimMonth
        ,count(c.MemberId) as MemberCount
        ,avg(c.ClaimAmount) as ClaimAvg
    from
        memberClaimsByMonth c
    where
        c.ClaimYear = 2016
    group by
        c.ClaimMonth
),
claimAvgOverMemberCount as (
    select  
        c.ClaimMonth
        ,c.ClaimAvg / c.MemberCount as ClaimAvgOverCount
    from 
        memberAvgClaimByMonth c
)

select 
    *
from 
    claimAvgOverMemberCount c
pivot 
(
    avg(c.ClaimAvgOverCount)
    for ClaimMonth in ([1],[2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12])
) p

我相信关键的收获是 PIVOT 在一年中的所有月份都在利用 AVG()。要动态过滤，您可以将数据透视查询封装到 CTE 中（或将结果放入临时表中）并使用动态 sql 获取您要查找的列（月）。

【讨论】：

感谢帖子，pim，我现在正在摆弄它。您的代码为每个成员提供了一个单独的行，但我正在寻找每个月的总成本/该月活跃的成员数量。我修改了代码以仅返回一行，但我不确定它是如何获取其值的。仍在努力。我会发布我修改它的方式，但这似乎不是评论字段中的选项。再次感谢，不过，我会继续加油的！
@AdamQuark 我已经更新了我的回复，其中包括第三个 cte 和对第二个 cte 的 group by 的修改。我认为这更接近您正在寻找的内容。
酷！感谢您的帮助，pim，非常感谢！
@AdamQuark 不用担心。如果这对您有所帮助，将不胜感激！
我以为我已经有了，但似乎没有。所以，纠正了这种情况。再次感谢！

【解决方案2】：

得到了我想要的版本。这是一组样本数据的最终代码集；

--------------------
/*
    Create member table.
*/
CREATE TABLE #Mbr_Data
    (
    Member_Name nvarchar(50) NULL,
    MemberID nvarchar(4) NULL,
    Eff_Period nvarchar(6) NULL,
    );
--------------------
/*
    Create claim table.
*/
CREATE TABLE #Clm_Data
    (
    Clm_Dt date NULL,
    Clm_Amt money NULL,
    Mbr_ID nvarchar(6) NULL,
    );
--------------------
/*
    Populate member table.
*/
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201601');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201602');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201603');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201604');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201605');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201606');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201607');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201608');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201609');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201610');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201611');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201612');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201701');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201702');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201703');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201704');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201705');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201706');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201707');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201708');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201709');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201710');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201711');
INSERT INTO #Mbr_Data VALUES ('Bob', '0001', '201712');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201607');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201608');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201609');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201610');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201611');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201612');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201701');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201702');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201703');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201704');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201705');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201706');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201707');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201708');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201709');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201710');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201711');
INSERT INTO #Mbr_Data VALUES ('Marie', '0002', '201712');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201601');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201602');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201603');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201604');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201605');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201606');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201607');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201608');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201609');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201610');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201611');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201612');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201701');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201702');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201703');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201704');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201705');
INSERT INTO #Mbr_Data VALUES ('Antoine', '0003', '201706');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201607');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201608');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201609');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201610');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201611');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201612');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201701');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201702');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201703');
INSERT INTO #Mbr_Data VALUES ('Frank', '0004', '201704');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201602');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201603');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201604');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201605');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201606');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201607');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201608');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201609');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201610');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201707');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201708');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201709');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201710');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201711');
INSERT INTO #Mbr_Data VALUES ('Sue', '0005', '201712');
--------------------
/*
    Populate claim table.
*/
INSERT INTO #Clm_Data VALUES ('2017-02-27', '523.37', '0004');
INSERT INTO #Clm_Data VALUES ('2016-08-24', '815.58', '0005');
INSERT INTO #Clm_Data VALUES ('2017-01-08', '541.91', '0004');
INSERT INTO #Clm_Data VALUES ('2016-12-08', '775.45', '0004');
INSERT INTO #Clm_Data VALUES ('2016-08-12', '177.44', '0003');
INSERT INTO #Clm_Data VALUES ('2017-01-19', '253.02', '0003');
INSERT INTO #Clm_Data VALUES ('2017-05-12', '539.29', '0003');
INSERT INTO #Clm_Data VALUES ('2016-08-23', '86.85', '0002');
INSERT INTO #Clm_Data VALUES ('2017-11-24', '869.67', '0002');
INSERT INTO #Clm_Data VALUES ('2016-10-15', '263.96', '0004');
INSERT INTO #Clm_Data VALUES ('2017-08-21', '111.27', '0001');
INSERT INTO #Clm_Data VALUES ('2016-06-17', '716.69', '0003');
INSERT INTO #Clm_Data VALUES ('2017-06-21', '754.21', '0002');
INSERT INTO #Clm_Data VALUES ('2016-06-12', '330.57', '0001');
INSERT INTO #Clm_Data VALUES ('2016-04-11', '770.02', '0001');
INSERT INTO #Clm_Data VALUES ('2016-07-13', '629', '0002');
INSERT INTO #Clm_Data VALUES ('2016-08-22', '876.02', '0001');
INSERT INTO #Clm_Data VALUES ('2017-03-21', '72.06', '0005');
INSERT INTO #Clm_Data VALUES ('2017-02-13', '249.11', '0005');
INSERT INTO #Clm_Data VALUES ('2017-08-13', '922.89', '0002');
INSERT INTO #Clm_Data VALUES ('2017-03-29', '760.59', '0003');
INSERT INTO #Clm_Data VALUES ('2017-01-10', '901.51', '0002');
INSERT INTO #Clm_Data VALUES ('2016-02-04', '432.17', '0003');
INSERT INTO #Clm_Data VALUES ('2017-02-14', '628.23', '0003');
INSERT INTO #Clm_Data VALUES ('2017-08-08', '718.05', '0002');
INSERT INTO #Clm_Data VALUES ('2016-12-28', '931.81', '0004');
INSERT INTO #Clm_Data VALUES ('2016-10-10', '973.44', '0002');
INSERT INTO #Clm_Data VALUES ('2017-08-26', '910.89', '0005');
INSERT INTO #Clm_Data VALUES ('2017-03-09', '613.04', '0004');
INSERT INTO #Clm_Data VALUES ('2017-07-14', '490.26', '0002');
INSERT INTO #Clm_Data VALUES ('2017-02-23', '941.18', '0005');
INSERT INTO #Clm_Data VALUES ('2017-06-19', '506.74', '0005');
INSERT INTO #Clm_Data VALUES ('2016-08-04', '970.9', '0001');
INSERT INTO #Clm_Data VALUES ('2016-11-13', '205.61', '0004');
INSERT INTO #Clm_Data VALUES ('2017-03-12', '580.84', '0002');
INSERT INTO #Clm_Data VALUES ('2016-09-25', '661.63', '0002');
INSERT INTO #Clm_Data VALUES ('2016-07-14', '391.89', '0004');
INSERT INTO #Clm_Data VALUES ('2016-12-16', '353.55', '0002');
INSERT INTO #Clm_Data VALUES ('2016-04-04', '284.09', '0005');
INSERT INTO #Clm_Data VALUES ('2016-07-16', '479.56', '0003');
INSERT INTO #Clm_Data VALUES ('2016-09-28', '276.65', '0002');
INSERT INTO #Clm_Data VALUES ('2016-08-06', '145.05', '0004');
INSERT INTO #Clm_Data VALUES ('2016-09-14', '947.97', '0001');
INSERT INTO #Clm_Data VALUES ('2016-09-24', '18.18', '0003');
INSERT INTO #Clm_Data VALUES ('2017-06-14', '489.54', '0001');
INSERT INTO #Clm_Data VALUES ('2017-08-06', '260.04', '0005');
INSERT INTO #Clm_Data VALUES ('2016-09-02', '224.2', '0001');
INSERT INTO #Clm_Data VALUES ('2017-12-23', '301.42', '0005');
INSERT INTO #Clm_Data VALUES ('2016-10-05', '636.12', '0004');
INSERT INTO #Clm_Data VALUES ('2017-06-26', '126.39', '0002');
INSERT INTO #Clm_Data VALUES ('2016-12-18', '156.15', '0001');
INSERT INTO #Clm_Data VALUES ('2016-11-21', '425.58', '0004');
INSERT INTO #Clm_Data VALUES ('2016-04-29', '619.03', '0001');
INSERT INTO #Clm_Data VALUES ('2016-07-07', '847.73', '0003');
INSERT INTO #Clm_Data VALUES ('2016-12-17', '143.94', '0001');
INSERT INTO #Clm_Data VALUES ('2016-02-24', '897.7', '0001');
INSERT INTO #Clm_Data VALUES ('2017-02-08', '130.13', '0002');
INSERT INTO #Clm_Data VALUES ('2017-01-02', '400.07', '0001');
INSERT INTO #Clm_Data VALUES ('2017-03-26', '289.36', '0004');
INSERT INTO #Clm_Data VALUES ('2016-07-26', '193.25', '0003');
INSERT INTO #Clm_Data VALUES ('2017-03-27', '585.15', '0005');
INSERT INTO #Clm_Data VALUES ('2016-11-06', '885.48', '0002');
INSERT INTO #Clm_Data VALUES ('2016-12-30', '104.55', '0003');
INSERT INTO #Clm_Data VALUES ('2017-10-08', '554.54', '0002');
INSERT INTO #Clm_Data VALUES ('2017-04-15', '37.34', '0004');
INSERT INTO #Clm_Data VALUES ('2017-06-17', '742.19', '0002');
INSERT INTO #Clm_Data VALUES ('2016-11-23', '527.78', '0004');
INSERT INTO #Clm_Data VALUES ('2017-06-06', '116.95', '0002');
INSERT INTO #Clm_Data VALUES ('2016-09-13', '408.24', '0004');
INSERT INTO #Clm_Data VALUES ('2016-09-12', '520.77', '0002');
INSERT INTO #Clm_Data VALUES ('2017-04-03', '325', '0001');
INSERT INTO #Clm_Data VALUES ('2016-11-13', '16.53', '0005');
INSERT INTO #Clm_Data VALUES ('2016-07-06', '845.77', '0004');
INSERT INTO #Clm_Data VALUES ('2016-08-21', '604.06', '0003');
INSERT INTO #Clm_Data VALUES ('2017-06-12', '47', '0001');
INSERT INTO #Clm_Data VALUES ('2017-05-06', '778.23', '0001');
INSERT INTO #Clm_Data VALUES ('2017-06-03', '507.67', '0002');
INSERT INTO #Clm_Data VALUES ('2016-10-20', '572.65', '0003');
INSERT INTO #Clm_Data VALUES ('2017-06-30', '764.08', '0005');
INSERT INTO #Clm_Data VALUES ('2016-08-19', '153.46', '0001');
INSERT INTO #Clm_Data VALUES ('2016-08-26', '491.57', '0005');
INSERT INTO #Clm_Data VALUES ('2016-04-18', '673.71', '0001');
INSERT INTO #Clm_Data VALUES ('2016-07-15', '830.9', '0001');
INSERT INTO #Clm_Data VALUES ('2017-10-06', '688.26', '0005');
INSERT INTO #Clm_Data VALUES ('2016-04-25', '676.57', '0001');
INSERT INTO #Clm_Data VALUES ('2016-04-11', '622.61', '0003');
INSERT INTO #Clm_Data VALUES ('2016-11-04', '723.65', '0005');
INSERT INTO #Clm_Data VALUES ('2016-07-31', '579.48', '0005');
INSERT INTO #Clm_Data VALUES ('2017-03-03', '831.47', '0003');
INSERT INTO #Clm_Data VALUES ('2016-12-22', '568.48', '0002');
INSERT INTO #Clm_Data VALUES ('2016-05-29', '800.18', '0005');
INSERT INTO #Clm_Data VALUES ('2017-08-19', '439.59', '0005');
INSERT INTO #Clm_Data VALUES ('2016-08-07', '396.01', '0001');
INSERT INTO #Clm_Data VALUES ('2016-10-26', '538.43', '0004');
INSERT INTO #Clm_Data VALUES ('2017-07-04', '382.15', '0005');
INSERT INTO #Clm_Data VALUES ('2017-12-30', '126.15', '0005');
INSERT INTO #Clm_Data VALUES ('2016-10-30', '195.71', '0005');
INSERT INTO #Clm_Data VALUES ('2017-08-06', '446.5', '0001');
INSERT INTO #Clm_Data VALUES ('2016-10-06', '484.34', '0003');
INSERT INTO #Clm_Data VALUES ('2016-11-20', '254.37', '0004');
--------------------
/*
    Dynamic query method.
*/
DECLARE
    @columns NVARCHAR(MAX),
    @columns2 NVARCHAR(MAX),
    @sql NVARCHAR(MAX);

SET @columns = '';

SELECT
    @columns += ',' + QUOTENAME(Eff_Period)
FROM
    (
    SELECT DISTINCT TOP 100 PERCENT
        Mbrs.Eff_Period
    FROM
        #Mbr_Data AS Mbrs
        INNER JOIN #Clm_Data AS Clms
            ON
                Mbrs.Eff_Period = FORMAT(Clms.Clm_Dt, 'yyyyMM')
                AND YEAR(Clms.Clm_Dt) = 2016
    ORDER BY
        Mbrs.Eff_Period
    ) AS Raw_Data
ORDER BY
    Eff_Period;

SET @columns2 = REPLACE(REPLACE(REPLACE(STUFF(@columns, 1, 1, ''), '],[', ''','''),'[' , ''''), ']', '''');

PRINT @columns
PRINT @columns2

SET @sql =
    '
    WITH
        Mbrs_CTE AS
            (
            SELECT
                Eff_Period,
                COUNT(DISTINCT MemberID) AS Mbr_Cnt
            FROM
                #Mbr_Data
            GROUP BY
                Eff_Period
            ),
        Clms_CTE AS
            (
            SELECT DISTINCT
                FORMAT(Clm_Dt, ''yyyyMM'') AS Eff_Period,
                SUM(Clm_Amt) OVER (PARTITION BY FORMAT(Clm_Dt, ''yyyyMM'')) AS Clm_Pmts
            FROM
                #Clm_Data
            ),
        PMPM_CTE AS
            (
            SELECT
                Mbrs.Eff_Period,
                Clm_S.Clm_Pmts / Mbrs.Mbr_Cnt AS Clms_PMPM
            FROM
                Mbrs_CTE AS Mbrs
                JOIN Clms_CTE AS Clm_S
                    ON Clm_S.Eff_Period = Mbrs.Eff_Period
            WHERE
                Clm_S.Eff_Period IN (' + @columns2 + ')
            )
        SELECT
            ' + STUFF(@columns, 1, 1, '') + '
        FROM
            PMPM_CTE AS S
            PIVOT(MAX(Clms_PMPM) FOR Eff_Period IN ('    + STUFF(@columns, 1, 1, '')    + ')) AS PMPM;
    ';

PRINT @sql;
EXEC sp_executesql @sql;
--------------------
DROP TABLE #Mbr_Data;
DROP TABLE #Clm_Data;
--------------------

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