组合SQL行

我有 sql压缩数据库,其中包含一个IP数据包头表.桌子看起来像这样：

Table: PacketHeaders    

ID  SrcAddress  SrcPort  DestAddress  DestPort  Bytes
1   10.0.25.1   255      10.0.25.50   500       64
2   10.0.25.50  500      10.0.25.1    255       80
3   10.0.25.50  500      10.0.25.1    255       16
4   75.48.0.25  387      74.26.9.40   198       72
5   74.26.9.40  198      75.48.0.25   387       64
6   10.0.25.1   255      10.0.25.50   500       48

我需要执行一个查询来显示通过本地网络进行的“对话”.来自A的数据包 – > B是与B – >的数据包相同的会话的一部分. A.我需要执行一个查询来显示正在进行的对话.基本上我需要的是这样的东西：

Returned Query:

SrcAddress  SrcPort  DestAddress  DestPort  TotalBytes  BytesA->B  BytesB->A
10.0.25.1   255      10.0.25.50   500       208         112        96
75.48.0.25  387      74.26.9.40   198       136         72         64

如您所见,我需要查询(或一系列查询)来识别A-> B与B-> A相同,并相应地分解字节计数.我不是任何手段的sql大师,但任何帮助,将不胜感激.

解决方法

尝试这个：

SELECT
    T1.SrcAddress,T1.SrcPort,T1.DestAddress,T1.DestPort,T1.Bytes + COALESCE(T2.Bytes,0) AS TotalBytes,T1.Bytes AS A_to_B,COALESCE(T2.Bytes,0) AS B_to_A
FROM (
    SELECT SrcAddress,SrcPort,DestAddress,DestPort,SUM(Bytes) AS Bytes
    FROM PacketHeaders
    GROUP BY SrcAddress,DestPort) AS T1
LEFT JOIN (
    SELECT SrcAddress,DestPort) AS T2
ON T1.SrcAddress = T2.DestAddress
AND T1.SrcPort = T2.DestPort
AND T1.DestAddress = T2.SrcAddress
AND T1.DestPort = T2.SrcPort
WHERE T1.SrcAddress < T1.DestAddress OR
    (T1.SrcAddress = T1.DestAddress AND T1.SrcPort = T1.DestPort) OR
    T2.DestAddress IS NULL

关于这个测试数据：

CREATE TABLE PacketHeaders (ID INT,SrcAddress NVARCHAR(100),SrcPort INT,DestAddress NVARCHAR(100),DestPort INT,Bytes INT);
INSERT INTO PacketHeaders (ID,SrcAddress,Bytes) VALUES
(1,'10.0.25.1',255,'10.0.25.50',500,64),(2,80),(3,16),(4,'75.48.0.25',387,'74.26.9.40',198,72),(5,(6,48),(7,'10.0.25.2',(8,'10.0.25.52',48);

这给出以下结果：

'10.0.25.1',208,112,96
'10.0.25.2',48,0
'10.0.25.52',0
'74.26.9.40',136,64,72

它的工作方式是首先组合单向会话并总计字节数.这样可以确保每个会话都会被正确地表示两次 – 每次方向一次.然后,此结果将自动连接以提供所需的结果,通过强制A(地址,端口)必须小于B来过滤重复项.使用左连接可以进行单向对话.

解决方法

相关推荐