應用不同的單柱

Question

我有一個SQL查詢

select distinct 
Process.ReportLogProcessID as [Process.ReportLogProcessID], 
Process.ProcessTitle as [Process.ProcessTitle], 
CAST(User0.PrimaryEmail AS nvarchar(max)) as [Process_Contacts.IsPrimaryContact] 

    from 
ReportProcess as Process inner join 
ReportProcessContact as ReportProcessContact0 on 
    ((ReportProcessContact0.SessionID = Process.SessionID)) left outer join 
[User] as User0 on 
    ((ReportProcessContact0.ReferenceID = User0.UserID)) left outer join 
[Group] as Group0 on 
    ((ReportProcessContact0.ReferenceID = Group0.GroupID and 
ReportProcessContact0.ReferenceType = 2)) 

order by 
[Process.ProcessTitle] asc 

，並在下面給出結果

，如果你看到它返回一個相同的「流程Title'-」兩行Testing123'有什麼辦法可以區分這一點，儘管無論是「Process Contact」。

是否有任何方法來區分特定列的基礎上的結果？

Answer 1

在您的查詢[Process_Contacts.IsPrimaryContact]列中有兩個記錄的不同電子郵件。如果你刪除該列，那麼只有它會有不同的記錄。

UPDATE：你可以嘗試這樣的：

select 
     Process.ReportLogProcessID as [Process.ReportLogProcessID], 
     Process.ProcessTitle as [Process.ProcessTitle], 
     MAX(CAST(User0.PrimaryEmail AS nvarchar(max))) as [Process_Contacts.IsPrimaryContact] 
from ReportProcess as Process 
inner join ReportProcessContact as ReportProcessContact0 on 
     ((ReportProcessContact0.SessionID = Process.SessionID)) 
left outer join [User] as User0 on 
     ((ReportProcessContact0.ReferenceID = User0.UserID)) 
left outer join [Group] as Group0 on 
     ((ReportProcessContact0.ReferenceID = Group0.GroupID and 
     ReportProcessContact0.ReferenceType = 2)) 

group by Process.ReportLogProcessID, Process.ProcessTitle 
order by [Process.ProcessTitle] asc