视图工作缓慢，是否必须在select临时表中使用select？

如何解决视图工作缓慢，是否必须在select临时表中使用select？

| 因此，我遇到了一个严重的麻烦，因为我的上一次查询执行时间是8分钟才能获得2500个节点。而且它只是其他两个视图的组合。 第一个视图是：

SELECT
   RecTime,sql AS str,ID,ROW_NUMBER() OVER(ORDER BY RecTime,ID) AS rwnb 
FROM         
   (SELECT
       A.RecTime,X.sql,X.ID
    FROM 
       dbo.EventView AS A 
    CROSS JOIN
       dbo.Incident AS X
    WHERE      
       (PATINDEX(\'%\' + A.Col + \'%\',X.sql) > 0)) AS INC

1秒和1600个节点 第二种观点是：

SELECT     
   D.RecTime,D.Event,D.ID,CAST(CASE WHEN X.[Value] IS NULL THEN 0 ELSE X.[Value] END AS bit) AS Value
FROM         
   dbo.XDependencedEvents AS D 
INNER JOIN
    dbo.EventView AS X ON X.Col = D.Event 
                          AND D.RecTime BETWEEN X.RecTime AND X.ChangedDate

3秒的执行时间和2100个节点 最后的看法是

SELECT 
    X.[Rectime],X.[ID],X.[str],D.[Event],D.[Value],X.[rwnb] 
FROM 
    [XDependencedIncidents] AS X
INNER JOIN [XEventStates] AS D ON X.[Rectime] = D.[Rectime]
                                  AND X.[ID] = D.[ID]

8分钟和2500个节点。 我什至使用RowNumber AS rwnb来加快视图的处理速度，但它仍然非常缓慢。我必须对前2个视图使用select进入临时表吗？还是我在这里做错了什么？ 最终目的是每次更改“事件”时获取“事件”的某些“组”的值     

解决方法

尝试这个：

SELECT X.[Rectime],X.[ID],X.[str],D.[Event],D.[Value],X.[rwnb] 
FROM [XDependencedIncidents] AS X
INNER JOIN [XEventStates] AS D ON X.[ID] = D.[ID]
WHERE X.[Rectime] = D.[Rectime]

如果它也慢。检查the4ѭ。     ,我的怪异解决方案是使用RowNumber像修改第二和最后一个视图，如：

SELECT     D.RecTime,D.Event,D.ID,CAST(CASE WHEN X.[Value] IS NULL THEN 0 ELSE X.[Value] END AS bit) AS Value,ROW_NUMBER() OVER(ORDER BY D.RecTime,D.ID) AS rwnb 
FROM         dbo.XDependencedEvents AS D 
    INNER JOIN
    dbo.EventView AS X 
        ON X.Col = D.Event 
        AND D.RecTime BETWEEN X.RecTime AND X.ChangedDate

和

SELECT X.[Rectime],X.[rwnb],D.[rwnb]
FROM [XDependencedIncidents] AS X
INNER JOIN [XEventStates] AS D ON X.[ID] = D.[ID]
AND X.[Rectime] = D.[Rectime]

您如何看待这种奇怪的优化方法？如果有的话，我真的想要一个更好的解决方案。 顺便说一句，是的，添加行号需要8分钟-> 5秒。