SQL应用参数而不是硬编码

我需要一点帮助，我有一份报告，我正在运行，它只提取一些基于硬编码的“类别”的特定信息。但是，我希望使其尽可能灵活，并且我希望用用户可以选择的参数替换这些编码的类别。然而，当我尝试这样做时，由于各种原因，它从来都不起作用。目前的代码是：

    SELECT          gcs_allocatedpdaidname AS PDA,
        gcs_consideringapplyingyearname AS 'Intending to Start ITT', 
        SUM(CASE WHEN (gcs_allocatedpdaid IS NOT NULL) AND (gcs_ContactType = 1) THEN 1 ELSE 0 END) AS 'Total Participants',
        SUM(CASE WHEN (gcs_allocatedpdaid IS NOT NULL) AND (gcs_ContactType = 1) AND (StatusCode = 1) THEN 1 ELSE 0 END) AS 'Active Participants', 
        SUM(CASE WHEN (gcs_allocatedpdaid IS NOT NULL) AND (gcs_ContactType = 1) AND (StatusCode = 200001) THEN 1 ELSE 0 END) AS 'Completed Participants', 
        SUM(CASE WHEN (gcs_allocatedpdaid IS NOT NULL) AND (gcs_ContactType = 1) AND ((gcs_categoryofparticipant = 7) OR
                            (gcs_categoryofparticipant = 8) OR
                            (gcs_categoryofparticipant = 9) OR
                            (gcs_categoryofparticipant = 10) OR
                            (gcs_categoryofparticipant = 11) OR
                            (gcs_categoryofparticipant = 12)) THEN 1 ELSE 0 END) AS 'On ITT and beyond TOTAL',

        SUM(CASE WHEN (gcs_allocatedpdaid IS NOT NULL) AND (gcs_ContactType = 1) AND ((StatusCode = 1) OR (StatusCode = 200001)) THEN 1 ELSE 0 END) AS 'On ITT and beyond ACTIVE/COMPLETE'

FROM            FilteredContact
GROUP BY gcs_allocatedpdaidname, gcs_allocatedpdaid, gcs_consideringapplyingyearname
HAVING        (gcs_allocatedpdaidname IN (@PDA)) AND (gcs_consideringapplyingyearname IN (@ITTYear))
ORDER BY PDA, 'Intending to Start ITT'

我要替换的硬编码是“gcs_类别参与者”，见下文：

SUM(CASE WHEN (gcs_allocatedpdaid IS NOT NULL) AND (gcs_ContactType = 1) AND
                                ((gcs_categoryofparticipant = 7) OR
                                (gcs_categoryofparticipant = 8) OR
                                (gcs_categoryofparticipant = 9) OR
                                (gcs_categoryofparticipant = 10) OR
                                (gcs_categoryofparticipant = 11) OR
                                (gcs_categoryofparticipant = 12)) THEN 1 ELSE 0 END) AS 'On ITT and beyond TOTAL'

我想应该是这样的：

SUM(CASE WHEN (gcs_allocatedpdaid IS NOT NULL) AND (gcs_ContactType = 1) AND (HAVING (gcs_categoryofparticipant IN (@Category))) THEN 1 ELSE 0 END) AS 'On ITT and beyond TOTAL'

这显然不起作用，但如果有人能给我指出正确的方向，我将不胜感激

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谢谢

您不需要在总和中或在查询结束时拥有-在查询结束时拥有可以更改为WHERE，而总和可以是：

SUM(CASE WHEN (gcs_allocatedpdaid IS NOT NULL) AND 
              (gcs_ContactType = 1) AND 
              (gcs_categoryofparticipant IN (@Category)) 
         THEN 1 
         ELSE 0 
    END) AS 'On ITT and beyond TOTAL'

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@ck，您可以在reporting services中使用多值参数，这就是多值参数的工作方式。