Question

我有3张桌子：

表1：“ vw_dimserver”：[ServerKey，ServerNm，ServerCurrentAssignedToNm]例如：[1234，hasgapp0108，Aya]

table2“ vw_DimWorker”：[WorkerEmailNm，WorkerIdsid]。例如：[Aya，akhate]，[Genna，gshysh]，[mish，mishka]（就像名称和用户名一样）

表3“ vw_FactHardwareAssetContact”：[ServerKey，HardwareAssetWorkerKey，HardwareAssetContactTypeNm]。例如：[1234，Aya，support] [1234，Genna，Customer] [1234，Mish，patch]（如果是支持人员，客户或补丁程序，则为服务器密钥，联系人姓名和联系人类型）

我需要将输出放在一行中： [ServerNm，ServerCurrentAssignedToNm的WorkerIdsid，客户的WorkerIdsid，支持的WorkerIdsid] [hasgapp0108，akhate，gshysh，mishka]

现在，我需要加入用户名表以获取每个用户的用户名。我是通过完全外部联接做到的。

代码是：

选择 vw_dimserver.ServerNm作为主机名，（vw_DimWorker1.WorkerIdsid）作为用户名，（vw_DimWorker2.WorkerIdsid）作为[主要支持联系人]，（vw_DimWorker3.WorkerIdsid）作为[主要客户联系人]

from vw_dimserver
        inner join vw_FactHardwareAssetContact  on vw_dimserver.ServerKey = vw_FactHardwareAssetContact.HardwareAssetKey 
    inner join vw_DimWorker as vw_DimWorker1  on  vw_DimWorker1.WorkerEmailNm = vw_dimserver.ServerCurrentAssignedToNm  
    full outer join  vw_DimWorker as  vw_DimWorker2 on   CONVERT(varchar(11),vw_FactHardwareAssetContact.HardwareAssetWorkerKey )  = vw_DimWorker2.workerWWID and vw_FactHardwareAssetContact.HardwareAssetContactTypeNm = 'Support' and vw_FactHardwareAssetContact.HardwareAssetPrimaryInd = '1'  and( vw_FactHardwareAssetContact.HardwareAssetWorkerKey is not NULL)
   full outer  join   vw_DimWorker as  vw_DimWorker3 on   CONVERT(varchar(11),vw_FactHardwareAssetContact.HardwareAssetWorkerKey )  = vw_DimWorker3.workerWWID and vw_FactHardwareAssetContact.HardwareAssetContactTypeNm = 'Customer' and vw_FactHardwareAssetContact.HardwareAssetPrimaryInd = '1' and( vw_FactHardwareAssetContact.HardwareAssetWorkerKey is not NULL)
where vw_dimserver.ServerNm ='hasgapp0108'   and (vw_DimWorker2.workerWWID is  not null or vw_DimWorker3.workerWWID is not null ) and ( ServerCurrentSubStatusCd != 'duplicate_error' or ServerCurrentSubStatusCd is NULL )

输出为两行：

[主机名用户名支持客户]

[hasgapp0108 akhate NULL gshysh]，

[hasgapp0108 akhate akhate NULL]

并且我需要将其排成一行：

[主机名用户名支持客户]

[hasgapp0108 akhate akhate gshysh]

我的经理不接受该解决方案：

select max(username1),max(username2)...

我需要通过联接来实现。

Answer 1

尝试使用内部联接和group_concat：

    SELECT vw_dimserver.ServerNm as hostname , group_concat(vw_DimWorker1.WorkerIdsid) as username, group_concat(vw_DimWorker2.WorkerIdsid) as [Primary Support Contact], group_concat(vw_DimWorker3.WorkerIdsid) as [Primary Customer Contact]

from vw_dimserver
        inner join vw_FactHardwareAssetContact  on vw_dimserver.ServerKey = vw_FactHardwareAssetContact.HardwareAssetKey 
    inner join vw_DimWorker as vw_DimWorker1  on  vw_DimWorker1.WorkerEmailNm = vw_dimserver.ServerCurrentAssignedToNm  
    full outer join  vw_DimWorker as  vw_DimWorker2 on   CONVERT(varchar(11),vw_FactHardwareAssetContact.HardwareAssetWorkerKey )  = vw_DimWorker2.workerWWID and vw_FactHardwareAssetContact.HardwareAssetContactTypeNm = 'Support' and vw_FactHardwareAssetContact.HardwareAssetPrimaryInd = '1'  and( vw_FactHardwareAssetContact.HardwareAssetWorkerKey is not NULL)
   full outer  join   vw_DimWorker as  vw_DimWorker3 on   CONVERT(varchar(11),vw_FactHardwareAssetContact.HardwareAssetWorkerKey )  = vw_DimWorker3.workerWWID and vw_FactHardwareAssetContact.HardwareAssetContactTypeNm = 'Customer' and vw_FactHardwareAssetContact.HardwareAssetPrimaryInd = '1' and( vw_FactHardwareAssetContact.HardwareAssetWorkerKey is not NULL)
where vw_dimserver.ServerNm ='hasgapp0108'   and (vw_DimWorker2.workerWWID is  not null or vw_DimWorker3.worker
group by vw_dimserver.ServerNm

Answer 2

如果只需要匹配结果，则可以使用内部联接

    SELECT
      s.ServerKey,
      s.ServerNm,
      group_concat(w.WorkerIdsid)
    FROM vw_dimserver s
    INNER JOIN vw_FactHardwareAssetContact c
      ON s.ServerKey = c.ServerKey
    INNER JOIN vw_DimWorker w
      ON c.HardwareAssetWorkerKey = w.WorkerEmailNm
    GROUP BY s.ServerKey,
             s.ServerNm

或者如果没有所有匹配项，也可以使用左联接

SELECT
  s.ServerKey,
  s.ServerNm,
  group_concat(w.WorkerIdsid)
FROM vw_dimserver s
LEFT JOIN vw_FactHardwareAssetContact c
  ON s.ServerKey = c.ServerKey
LEFT JOIN vw_DimWorker w
  ON c.HardwareAssetWorkerKey = w.WorkerEmailNm
GROUP BY s.ServerKey,
         s.ServerNm

Answer 3

选择vw_dimserver.ServerNm作为主机名，（vw_DimWorker1.WorkerIdsid）作为用户名，（vw_DimWorker2.WorkerIdsid）作为[主要支持联系人]，（vw_DimWorker3.WorkerIdsid）作为[主要客户联系人]

来自vw_dimserver

完整外部联接vw_FactHardwareAssetContact作为vw_FactHardwareAssetContact1 在（vw_dimserver.ServerKey = vw_FactHardwareAssetContact1.HardwareAssetKey和vw_FactHardwareAssetContact1.HardwareAssetContactTypeNm ='Support'和vw_FactHardwareAssetContact1.HardwareAssetPrimaryInd ='1'）

在CONVERT上作为vw_DimWorker1的完整外部联接vw_DimWorker（varchar（11），vw_FactHardwareAssetContact1.HardwareAssetWorkerKey）= vw_DimWorker1.workerWWID

在assings.WorkerEmailNm = vw_dimserver.ServerCurrentAssignedToNm上作为完整外部联接vw_DimWorker

完整外部联接vw_FactHardwareAssetContact作为vw_FactHardwareAssetContact2（vw_dimserver.ServerKey = vw_FactHardwareAssetContact2.HardwareAssetKey和vw_FactHardwareAssetContact2.HardwareAssetContactTypeNm ='Customer'和vwAssetHardwared。

在CONVERT上作为vw_DimWorker2的完整外部联接vw_DimWorker（varchar（11），vw_FactHardwareAssetContact2.HardwareAssetWorkerKey）= vw_DimWorker2.workerWWID

完整的外部将vw_FactHardwareAssetContact作为vw_FactHardwareAssetContact11加入（vw_dimserver.ServerKey = vw_FactHardwareAssetContact11.HardwareAssetKey和vw_FactHardwareAssetContact11.HardwareAssetContactTypeNm ='Support'和vw_FactHard

在CONVERT上作为vw_DimWorker11的完整外部联接vw_DimWorker（varchar（11），vw_FactHardwareAssetContact11.HardwareAssetWorkerKey）= vw_DimWorker11.workerWWID

在（vw_dimserver.ServerKey = vw_FactHardwareAssetContact22.HardwareAssetKey和vw_FactHardwareAssetContact22.HardwareAssetContactTypeNm ='Customer'HardwareAsetd'Hardware's'HardwareAssetd 上输入vw_FactHardwareAssetContact22。

完全外部联接vw_DimWorker作为CONVERT上的vw_DimWorker22（varchar（11），vw_FactHardwareAssetContact22.HardwareAssetWorkerKey）= vw_DimWorker22.workerWWID

如何在SQL 3表完全外部联接？

3 个答案: