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在组合两个 SQL 查询时寻求帮助（或提供关于可行性的意见）。我们的卫生局网络服务组单独使用这些查询来规划 WAN 带宽分配。我们的网络监控系统使用 MS SQL Server 2012 作为数据库。

当过去 30 天内 WAN 链接的平均利用率超过 90% 时，第一个查询会提取一个指标。这不是我创建的，但似乎是高度使用网络的良好代理。不知道为什么'where'子句中有两个日期时间语句：

DECLARE @StartDate DateTime
DECLARE @EndDate DateTime

SET @StartDate =CAST((ROUND(CAST(GetDate() - 30 AS FLOAT), 0, 1)) as datetime) 
SET @EndDate = GetDate()

SELECT     
    Nodes.HA, 
    Nodes.Site, 
    Nodes.Address,
    Nodes.City,
    Nodes.SiteType,
    Interfaces.WANFeed, 
    (Interfaces.InBandwidth / 1000000) As Subscribed_Mbps,
    Count(*) as SaturationEvents

FROM
    Interfaces 
    INNER JOIN InterfaceTraffic_Detail ON Interfaces.InterfaceID = InterfaceTraffic_Detail.InterfaceID 
    INNER JOIN Nodes ON Interfaces.NodeID = Nodes.NodeID
WHERE      
    (NOT (Interfaces.WANFeed IS NULL)) 
    AND (InterfaceTraffic_Detail.DateTime > DATEADD(day, -30, GETDATE())) 
    AND (InterfaceTraffic_Detail.In_Averagebps / Interfaces.InBandwidth > .9)
    AND (Nodes.SiteType = 'Acute')
    AND (DateTime between @StartDate and @EndDate)

GROUP BY 
    Nodes.HA,
    Nodes.SiteType,
    Nodes.Site,
    Nodes.Address,
    Nodes.City, 
    Interfaces.WANFeed,
    Interfaces.InBandwidth

Order By SaturationEvents Desc

Sample output (cleaned)

HA  SITE    Address City    SiteType    WANFeed Subscribed_Mbps Saturation Events
--- --- --- --- Acute   Primary 10  252
--- --- --- --- Acute   Primary 10  152
--- --- --- --- Acute   Primary 100 104
--- --- --- --- Acute   Primary 10  57

我根据我们的 NMS 供应商提供的示例创建了第二个查询。它报告 95% 的利用率：

DECLARE @StartDate DateTime
DECLARE @EndDate DateTime

SET @StartDate =CAST((ROUND(CAST(GetDate() - 30 AS FLOAT), 0, 1)) as datetime) 
SET @EndDate = GetDate()

SELECT  

Nodes.HA,
Nodes.Site,
Nodes.Address,
Nodes.City,
Interfaces.WANFeed,
Nodes.SiteType,
(Interfaces.InBandwidth / 1000000) As Subscribed_Mbps,
Interfaces.InterfaceId,
Nodes.NodeID,
Nodes.Caption AS NodeName,
Interfaces.Caption AS Interface_Caption,
Maxbps_In95,
Maxbps_Out95,
Maxbps_95

FROM Nodes
INNER JOIN Interfaces ON Nodes.NodeID = Interfaces.NodeID
INNER JOIN (
    SELECT  InterfaceID,
            dbo.GetInBps95th(InterfaceID,@StartDate ,@EndDate ) AS Maxbps_In95,
            dbo.GetOutBps95th(InterfaceID,@StartDate ,@EndDate ) AS Maxbps_Out95,
            dbo.GetMaxBps95th(InterfaceID,@StartDate ,@EndDate ) AS Maxbps_95
    FROM InterfaceTraffic
    WHERE InterfaceTraffic.DateTime >= @StartDate AND InterfaceTraffic.DateTime <= @EndDate 
    GROUP BY InterfaceID
) TrafficStat
ON Interfaces.InterfaceID = TrafficStat.InterfaceID

WHERE
(NOT (Interfaces.WANFeed IS NULL)) AND
(Nodes.SiteType = 'Acute') AND
(Interfaces.WANFeed <> 'Secondary') 

ORDER BY HA,NodeName, Interface_Caption

Sample Output (cleaned)

SITE    Address City    SiteType    WANFeed Subscribed_Mbps InterfaceID NodeID  Hostname    Interface_Caption   Maxbps_In95 Maxbps_Out95    Maxbps_95
--- --- --- Primary Acute   10000   25899   3516    --- --- 2.84E+08    3.92E+08    4.01E+08
--- --- --- Primary Acute   20000   23428   3508    --- --- 7.44E+08    3.50E+08    7.52E+08
--- --- --- Primary Acute   10000   23354   3508    --- --- 5.74E+08    4.61E+08    6.46E+08
--- --- --- Primary Acute   10000   23368   3508    --- --- 2.28E+08    4.59E+07    2.28E+08
--- --- --- Primary Acute   1000    11389   1232    --- --- 8.42E+07    8.55E+07    1.06E+08
--- --- --- Primary Acute   1000    29360   1234    --- --- 6.65E+07    3.95E+07    7.46E+07

我希望它们可以合并为一份报告（只有一些网站会饱和，但所有网站都会有 95% 的百分比。）

感谢您花时间看这个。

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1 回答 1

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首先，我认为它会引起更多的混乱，而不是直接组合成一个查询。但是，您可以声明两个临时表，从不同的查询中填充每个表，然后从表之间的连接中选择所需的结果集。

此外，查询似乎比必要的要复杂一些，只需稍加调整即可使其运行得更快并更清晰。我建议如下：

  1. 不需要@EndDate参数，因为查询一直运行到当前时间。因此，更改每个日期比较以查找DateTime >= @StartDate.
  2. (NOT (Interfaces.WANFeed IS NULL))增加了不必要的复杂性。改为使用(Interfaces.WANFeed IS NOT NULL)。
  3. 删除或澄清第一个查询中子句AND (DateTime between @StartDate and @EndDate)末尾的。WHERE它看起来是多余的，并且不完全符合其正确别名。如果这是与第一个日期比较不同的字段，只需添加表别名以进行说明。

我希望所有这些都会有所帮助。

于 2015-12-04T02:48:11.683 回答