用于过滤匹配结果的SQL查询

Question

        SELECT TOP 92 PERCENT 
        Convert(DateTime,Floor(Cast((DateTime) as Float)*24)/24,0) AS SummaryDateTime,
        MIN(APM_ApplicationAvailability.PercentAvailability) AS MIN_of_ApplicationAvailability,
        Nodes.Caption AS NodeName 

        FROM 
        (Nodes INNER JOIN APM_AlertsAndReportsData ON (Nodes.NodeID = APM_AlertsAndReportsData.NodeId))  INNER JOIN APM_ApplicationAvailability ON (APM_AlertsAndReportsData.ApplicationId = APM_ApplicationAvailability.ApplicationID)


        WHERE 
        ( DateTime BETWEEN 40907 AND 41205 )
         AND  
        (
          (APM_AlertsAndReportsData.ApplicationName LIKE '%HTTP%') AND 
          (Nodes.Caption = 'www.example.com')
        )
GROUP BY Convert(DateTime,Floor(Cast((DateTime) as Float)*24)/24,0), 
Nodes.Caption


ORDER BY SummaryDateTime ASC

以上查询给我以下结果，附在图像上。

我想编写一个查询来过滤掉所有0.00%结果，因此它只会提供0.00%个数据，因为我不关心100%数据。我不知道如何过滤数据。

Answer 1

这是您的完整查询吗？您有混合聚合（MIN）和非聚合（Datetime） 我假设你在某个地方有一个GROUP BY，但无论如何，直截了当的方法是对它进行子查询。

SELECT *
FROM (
    SELECT TOP 92 PERCENT
        Convert(DateTime,Floor(Cast((DateTime) as Float)*24)/24,0) AS SummaryDateTime,
        MIN(APM_ApplicationAvailability.PercentAvailability) AS MIN_of_ApplicationAvailability,
        Nodes.Caption AS NodeName 
    FROM Nodes
    INNER JOIN APM_AlertsAndReportsData
            ON Nodes.NodeID = APM_AlertsAndReportsData.NodeId
    INNER JOIN APM_ApplicationAvailability
            ON APM_AlertsAndReportsData.ApplicationId = APM_ApplicationAvailability.ApplicationID
    WHERE DateTime BETWEEN 40907 AND 41205
      AND APM_AlertsAndReportsData.ApplicationName LIKE '%HTTP%'
      AND Nodes.Caption = 'www.example.com'
    -- GROUP BY..
) X
WHERE MIN_of_ApplicationAvailability = 0.0

通常，对于聚合查询，您还可以使用HAVING子句，例如

    SELECT TOP 92 PERCENT
        Convert(DateTime,Floor(Cast((DateTime) as Float)*24)/24,0) AS SummaryDateTime,
        MIN(APM_ApplicationAvailability.PercentAvailability) AS MIN_of_ApplicationAvailability,
        Nodes.Caption AS NodeName 
    FROM Nodes
    INNER JOIN APM_AlertsAndReportsData
            ON Nodes.NodeID = APM_AlertsAndReportsData.NodeId
    INNER JOIN APM_ApplicationAvailability
            ON APM_AlertsAndReportsData.ApplicationId = APM_ApplicationAvailability.ApplicationID
    WHERE DateTime BETWEEN 40907 AND 41205
      AND APM_AlertsAndReportsData.ApplicationName LIKE '%HTTP%'
      AND Nodes.Caption = 'www.example.com'
    GROUP BY DateTime, Nodes.Caption
    HAVING MIN(APM_ApplicationAvailability.PercentAvailability) = 0.0