当“全选”参数勾选时，所有数据均未显示

Question

这是我的报告所喜欢的一瞥，一系列图表，您可以选择一个国家和12个月滚动或36个月滚动的日期范围。

该报告在选择一个国家/地区以及在12个月或36个月的日期范围内查看不同数据方面表现良好。

当我'选择所有'国家/地区时出现问题。我想要的是在图表上代表的所有国家的总数。如下所示，选择了所有国家/地区后，图表上的数据与上图无关。

国家/地区参数

这是我的存储过程

ALTER PROCEDURE [name] @Country VARCHAR(max)
    ,@DateRange VARCHAR(max)
AS
BEGIN


        SELECT country
            ,[yyyy-mm]
            ,[12Months]
            ,[36Months]
            ,[Population]
            ,[Employed]
        FROM (
            SELECT CASE [countryID]
                    WHEN '800002'
                        THEN 'UK'
                    WHEN '800003'
                        THEN 'France'
                    WHEN '800004'
                        THEN 'Germany'
                    ELSE 'N/A'
                    END AS country
                ,Convert(CHAR(7), [DateTimeOfCall], 121) "yyyy-mm"
                ,CASE 
                    WHEN datetimeofcall BETWEEN Dateadd(Month, Datediff(Month, 0, DATEADD(m, - 12, current_timestamp)), 0)
                            AND Dateadd(Month, Datediff(Month, 0, DATEADD(m, 0, current_timestamp)), 0)
                        THEN 'y'
                    ELSE 'n'
                    END AS [12Months]
                ,CASE 
                    WHEN datetimeofcall BETWEEN Dateadd(Month, Datediff(Month, 0, DATEADD(m, - 36, current_timestamp)), 0)
                            AND Dateadd(Month, Datediff(Month, 0, DATEADD(m, 0, current_timestamp)), 0)
                        THEN 'y'
                    ELSE 'n'
                    END AS [36Months]
                ,sum(CASE 
                        WHEN [CategoryID] = '180003'
                            AND [CauseID] IN (
                                '700002'
                                ,'700003'
                                )
                            AND [TypeID] = '100002'
                            AND [PopTypeID] BETWEEN '170002'
                                AND '170019'
                            THEN 1
                        ELSE 0
                        END) Population
                ,sum(CASE 
                        WHEN [EmpID] = '210002'
                            THEN 1
                        ELSE 0
                        END) AS Employed
            FROM [dbo].[country]
            WHERE STATUS = '1'
            GROUP BY [countryID]
                ,Convert(CHAR(7), [DateTimeOfCall], 121)
                ,CASE 
                    WHEN datetimeofcall BETWEEN Dateadd(Month, Datediff(Month, 0, DATEADD(m, - 12, current_timestamp)), 0)
                            AND Dateadd(Month, Datediff(Month, 0, DATEADD(m, 0, current_timestamp)), 0)
                        THEN 'y'
                    ELSE 'n'
                    END
                ,CASE 
                    WHEN datetimeofcall BETWEEN Dateadd(Month, Datediff(Month, 0, DATEADD(m, - 36, current_timestamp)), 0)
                            AND Dateadd(Month, Datediff(Month, 0, DATEADD(m, 0, current_timestamp)), 0)
                        THEN 'y'
                    ELSE 'n'
                    END
            ) a



    WHERE country in (@country)
        AND (
            (
                @DateRange = 12
                AND [12Months] = 'Y'
                )
            OR (
                @DateRange = 36
                AND [36Months] = 'Y'
                )
            )


END

这就是输出

country        yyyy-mm      Population   Employed     12months      36months

  uk           2016-06        56            43           y             y
  france       2016-06        40            22           y             y
  Germany      2016-06        73            32           y             y
  uk           2015-06        45            10           n             y
  france       2015-06        30            11           n             y
  Germany      2015-06        76            56           n             y
   AND SO ON......

所有帮助表示感谢，谢谢。