根据参数值显示 SSRS 中的前 n 个值

Question

所以我在 SSRS 中有一个包含三列的简单表。第一个是代理（调用处理程序的名称），第二个由一个参数填充，该参数控制 6 个可能的列中的哪一个显示数据。构成数据集的查询如下；

SELECT CAST(Day AS DATE) AS 'Day'
, ISNULL(externalID, '**No Agent**') AS 'Agent'
, CAST((TalkTime + BreakTime + BusyonDNTime + BusyMiscTime + ConsultationTime + RingTime + Default_ACW + Wrap) / NULLIF ([Calls Ans], 0) AS DECIMAL(18, 2)) AS 'AHT'
, CAST([Comfort Break] / NULLIF (Logged, 0) AS DECIMAL(18, 6)) AS 'ComfortBreak'
, CAST([Designated Other] / NULLIF (Logged, 0) AS DECIMAL(18, 6)) AS 'DesignatedOther'
, CAST(Reflection / NULLIF (Logged, 0) AS DECIMAL(18, 6)) AS 'Reflection'
, CAST([System Failure] / NULLIF (Logged, 0) AS DECIMAL(18, 6)) AS 'SystemFailure'
, CAST(Skillset_Default_Activity_Code / NULLIF (Logged, 0) AS DECIMAL(18,6)) AS 'Skillset_Default_Activity_Code'
, [Short Calls Ans] AS 'ShortCallsAns'
, CASE WHEN CAST(([TalkTime] + [BreakTime] + [BusyonDNTime] + [BusyMiscTime] + [ConsultationTime] + [RingTime] + [Default_ACW] + [Wrap]) / NULLIF ([Calls Ans],0) AS DECIMAL(18, 2)) IS NULL
         AND CAST([Comfort Break] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Designated Other] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Reflection] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL AND CAST([System Failure] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Skillset_Default_Activity_Code] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL AND [Short Calls Ans] IS NULL
         THEN 0 
        ELSE 1 
        END AS DataFlag
FROM            PulseReportData
WHERE        (CAST(Day AS DATE) = @ActivityDate) AND 
                     ((CASE WHEN CAST(([TalkTime] + [BreakTime] + [BusyonDNTime] + [BusyMiscTime] + [ConsultationTime] + [RingTime] + [Default_ACW] + [Wrap]) / NULLIF ([Calls Ans],0) AS DECIMAL(18, 2)) IS NULL
         AND CAST([Comfort Break] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Designated Other] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Reflection] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL AND CAST([System Failure] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Skillset_Default_Activity_Code] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL AND [Short Calls Ans] IS NULL
         THEN 0 
        ELSE 1 
        END) = 1)

报告有一个名为@Field 的参数，其值是上述列的列名（日期和代理除外）。报告上的第 2 列数据文本框包含以下表达式；

=Fields(Parameters!Field.Value).Value

因此，在报告运行之前从下拉列表中选择的列名称将显示在第二列中。

我不知道如何开始工作是这样的；

我需要添加一个参数，让用户选择 5、10、20 或 50 的排名编号，根据返回的数字显示前 5、10、20 或 50 名代理列被选中。我尝试将以下内容添加到数据集查询中；

ROW_NUMBER() OVER (partition BY @Field ORDER BY @Field DESC) AS rn

然后将 rn 列添加为报告中的第三列。然后，我对 tablix 应用了一个过滤器，以说明 rn 列的位置

发生的情况是报告中显示了代理和值列表，第三列中显示的排名值的正确数量是从@rank 下拉参数中选择的，但主列的值未在降序。他们似乎完全是随机的。因此，就像我添加到数据集查询的 ROW_NUMBER 列对参数内的列不感兴趣一样。我只是想不出一种方法来根据前 5、10、20 或 50 名恢复这些排名值：-S

Answer 1

有几种方法可以做到这一点，最简单的方法是向您的 sql 添加两个参数，这些参数映射到所选列和返回的所需行数。诀窍是您可以在 order by 语句中使用别名，因此通过 ComfortBreak 订购是完全可行的。在下面的示例中，我使用 offset fetch 将更改隔离到最后，以便更清楚地了解更改是什么，但 Select top @RowCount 也可以。

SELECT CAST(Day AS DATE) AS 'Day'
, ISNULL(externalID, '**No Agent**') AS 'Agent'
, CAST((TalkTime + BreakTime + BusyonDNTime + BusyMiscTime + ConsultationTime + RingTime + Default_ACW + Wrap) / NULLIF ([Calls Ans], 0) AS DECIMAL(18, 2)) AS 'AHT'
, CAST([Comfort Break] / NULLIF (Logged, 0) AS DECIMAL(18, 6)) AS 'ComfortBreak'
, CAST([Designated Other] / NULLIF (Logged, 0) AS DECIMAL(18, 6)) AS 'DesignatedOther'
, CAST(Reflection / NULLIF (Logged, 0) AS DECIMAL(18, 6)) AS 'Reflection'
, CAST([System Failure] / NULLIF (Logged, 0) AS DECIMAL(18, 6)) AS 'SystemFailure'
, CAST(Skillset_Default_Activity_Code / NULLIF (Logged, 0) AS DECIMAL(18,6)) AS 'Skillset_Default_Activity_Code'
, [Short Calls Ans] AS 'ShortCallsAns'
, CASE WHEN CAST(([TalkTime] + [BreakTime] + [BusyonDNTime] + [BusyMiscTime] + [ConsultationTime] + [RingTime] + [Default_ACW] + [Wrap]) / NULLIF ([Calls Ans],0) AS DECIMAL(18, 2)) IS NULL
         AND CAST([Comfort Break] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Designated Other] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Reflection] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL AND CAST([System Failure] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Skillset_Default_Activity_Code] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL AND [Short Calls Ans] IS NULL
         THEN 0 
        ELSE 1 
        END AS DataFlag
FROM            PulseReportData
WHERE        (CAST(Day AS DATE) = @ActivityDate) AND 
                     ((CASE WHEN CAST(([TalkTime] + [BreakTime] + [BusyonDNTime] + [BusyMiscTime] + [ConsultationTime] + [RingTime] + [Default_ACW] + [Wrap]) / NULLIF ([Calls Ans],0) AS DECIMAL(18, 2)) IS NULL
         AND CAST([Comfort Break] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Designated Other] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Reflection] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL AND CAST([System Failure] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL 
         AND CAST([Skillset_Default_Activity_Code] / NULLIF ([Logged], 0) AS DECIMAL(18, 6)) IS NULL AND [Short Calls Ans] IS NULL
         THEN 0 
        ELSE 1 
        END) = 1)
order by @SelectedColumn /* acs/desc whatever is appropriate */
offset 0 rows fetch next @RowsReturned only