將狀態檢查添加到多個表查詢

Question

我有一個查詢可以從受影響的表和支持表中查找應用程序。還有第三個表格，其中包含我需要查詢的更多項目信息。其中之一是地位領域。我想將連接添加到該Project表中，並且只有當狀態顯示爲「正在進行」時才返回結果。這是我到目前爲止有：數據

例和列

下面

Appid ProjectId 
197 251 

項目信息欄應用信息下面

ProjectID ProjectName ImplementationDate Status

select AppId     = a.AppId, 
    ApplicationName   = a.ApplicationName 

from  Applications   a 
left join (select AppId = t.AppId , 
       Cnt = count(*) 
     from ImpactedApplications t 
     group by t.AppId 
    ) ia on ia.AppId = a.AppId 
left join (select AppId = t.AppId , 
       Cnt = count(*) 
     from SupportingApplications t 
     group by t.AppId 
    ) sa on sa.AppId = a.AppId 
     where sa.Cnt > 0 OR ia.Cnt > 0 ORDER BY ApplicationName ASC 

Answer 1

CTE方法

; WITH CTE（APPID，應用程序名稱，專案編號） AS （

select AppId     = a.AppId, 
     ApplicationName   = a.ApplicationName, 
     ProjectId    = a.ProjectId 
    from  Applications   a 
    left join (select AppId = t.AppId 
        Cnt = count(*) 
      from ImpactedApplications t 
      group by t.AppId 
     ) ia on ia.AppId = a.AppId 
    left join (select AppId = t.AppId 
        Cnt = count(*) 
      from SupportingApplications t 
      group by t.AppId 
     ) sa on sa.AppId = a.AppId 
      where sa.Cnt > 0 OR ia.Cnt > 0 ORDER BY ApplicationName ASC 

) 
select * from CTE C 
INNER JOIN Porject P 
on C.ProjectId = P.ProjectID 
and P.Status = 'InProgress' 

如果我沒看錯的與您現有的代碼UNION可能會在這裏工作

SELECT ApplicationName , P.* 
FROM Applications A 
INNER JOIN ImpactedApplications IA 
on A.AppId = IA.AppId 
INNER JOIN Project P 
on IA.ProjectId = P.ProjectID 
AND P.Status ='InProgress' 
UNION 
SELECT ApplicationName , P.* 
FROM Applications A 
INNER JOIN SupportingApplications SA 
on A.AppId = SA.AppId 
INNER JOIN Project P 
on IA.ProjectId = P.ProjectID 
AND P.Status ='InProgress' 
order by ApplicationName ASC 

Answer 2

則需根據加盟項目表申請表on projectid on both table and only need to retrieve records have where status = InProgress。

select AppId     = a.AppId, 
    ApplicationName   = a.ApplicationName, 
    p.* 
from  Applications   a 
left join (select AppId = t.AppId , 
       Cnt = count(*) 
     from ImpactedApplications t 
     group by t.AppId 
    ) ia on ia.AppId = a.AppId 
left join (select AppId = t.AppId , 
       Cnt = count(*) 
     from SupportingApplications t 
     group by t.AppId 
    ) sa on sa.AppId = a.AppId 
join project p on a.projectid=p.projectid 
     where (sa.Cnt > 0 OR ia.Cnt > 0) 
      and p.status='InProgress' 
ORDER BY ApplicationName ASC