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我有一个跟踪网络中断的数据库，我想运行一个报告，向我显示持续时间超过 30 分钟的中断。我可以让它显示所有的中断，但我不知道如何让它只显示超过 30 分钟的中断。这就是我到目前为止所拥有的。

SELECT 
  StartTime.EventTime, 
  Nodes.NodeId,
  Nodes.Caption, 
  Nodes.Location,
  StartTime.Message, 
  DATEDIFF(Mi, StartTime.EventTime, 
    (SELECT TOP 1 EventTime 
     FROM Events AS Endtime 
     WHERE EndTime.EventTime > StartTime.EventTime  AND EndTime.EventType = 5
       AND EndTime.NetObjectType = 'N' 
       AND EndTime.NetworkNode = StartTime.NetworkNode 
     ORDER BY EndTime.EventTime)) AS OutageDurationInMinutes
FROM Events StartTime INNER JOIN Nodes ON StartTime.NetworkNode = Nodes.NodeID 
WHERE (StartTime.EventType = 1) 
  AND (StartTime.NetObjectType = 'N') 
  AND eventtime between dateadd(day, -1, getdate()) and getdate()
ORDER BY Nodes.Caption ASC

我得到的结果是这样的。我已经删除了一些信息。

Time of Outage      Name    Location Down Event          Outage Duration
8/3/2012 4:14       x       x        Stopped Responding                2
8/4/2012 5:14       x       x        Stopped Responding                 
8/5/2012 4:14       x                Stopped Responding               52
8/6/2012 4:14       x       x        Stopped Responding               20
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1 回答 1

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一种方法是使您的查询成为子查询或 CTE：

with q as (<your query here without the order by>)
select *
from q
where q.OutageDuragtionInMinutes > 30
order by Caption
于 2012-08-03T15:18:24.177 回答