Linq包含求和和子查詢不起作用的查詢

Question

我對Linq和實體框架有點新，並且我有要求在我的數據訪問層中編寫linq查詢。我想生產的SQL是：

Select c.Configurationid, 
     ConfigurationDescription, 
     coalesce(d.enrolment,0) as Enrolment, 
     coalesce(d.accepts,0) as Accepts, 
     coalesce(d.rejects,0) as Rejects, 
     coalesce(d.incomplete,0) as Incomplete  
from VVConfiguration c with (nolock) 
LEFT JOIN (
Select ConfigurationId, 
     Sum(case when d.dialoguestatusid = 1 and d.processtypeid = 1 and e.CreateDate = dates.maxcreatedate then 1 else 0 end) as enrolment, 
     sum(case when ec.verificationdecisionid in (2, 3, 5) and d.ProcessTypeID = 2 and e.CreateDate = dates.maxcreatedate then 1 else 0 end) as accepts, 
     sum(case when ec.verificationdecisionid = 6 and d.ProcessTypeID = 2 and e.CreateDate = dates.maxcreatedate then 1 else 0 end) as rejects, 
     sum(case when d.dialoguestatusid = 4 and (e.CreateDate = dates.maxcreatedate or e.CreateDate IS NULL) then 1 else 0 end) as Incomplete 
from dbo.dialogue d with (nolock) 
LEFT JOIN exchange e with (nolock) on e.dialogueid = d.dialogueid 
LEFT JOIN exchangeclaimant ec on e.exchangeid = ec.ExchangeID 
left JOIN 
(Select a.DialogueID,max(ex.CreateDate) as maxcreatedate from Dialogue a (nolock) 
        JOIN Exchange ex with (nolock) on a.dialogueId = ex.dialogueid           
        group by (a.dialogueid)) dates on dates.maxcreatedate = e.createdate and dates.DialogueID = d.DialogueID 

group by d.configurationid) d on d.configurationid = c.configurationid 
Where c.OrganisationUnitId = '1234' 
order by configurationdescription 

通過閱讀一些文章和問題，所以我想出了這個查詢，但查詢是給一些錯誤的數字，它的時間太長運行。

有人可以幫助我，我做錯了什麼？

(from c in this.context.VVConfiguration 
join p in 
    (
     from d in this.context.Dialogue 
     join e in this.context.Exchange on d.DialogueID equals e.DialogueID into ex 
     from exd in ex.DefaultIfEmpty() 
     join ec in this.context.ExchangeClaimant on exd.ExchangeID equals ec.ExchangeID into exc 
     from exec in exc.DefaultIfEmpty() 
     join date in 
      (
       from di in this.context.Dialogue 
       join x in this.context.Exchange on di.DialogueID equals x.ExchangeID 
       join xc in this.context.ExchangeClaimant on x.ExchangeID equals xc.ExchangeID 
       group xc by new { di.DialogueID } into dates 
       select new 
       { 
        MaxDate = dates.Max(a => a.Exchange.CreateDate) 
       } 
      ) on exec.Exchange.CreateDate equals date.MaxDate into xc 
     from xec in xc.DefaultIfEmpty() 
     group exec by new { d.ConfigurationID } into g 
     select new 
     { 
      ConfigurationID = g.Key.ConfigurationID, 
      Enrolment = g.Sum(a => ((a.Exchange.Dialogue.DialogueStatusID == 1 && a.Exchange.Dialogue.ProcessTypeID == 1) ? 1 : 0)), 
      Accepts = g.Sum(a => ((acceptsVerficationList.Contains(a.VerificationDecisionID) && a.Exchange.Dialogue.ProcessTypeID == 2) ? 1 : 0)), 
      Rejects = g.Sum(a => ((a.VerificationDecisionID == 6 && a.Exchange.Dialogue.ProcessTypeID == 2) ? 1 : 0)), 
      InComplete = g.Sum(a => (a.Exchange.Dialogue.DialogueStatusID == 4) ? 1 : 0) 
     } 
    ) on c.ConfigurationID equals p.ConfigurationID into details 
from configuration in details.DefaultIfEmpty() 
where c.OrganisationUnitID == new Guid(organizationId) 
orderby c.ConfigurationDescription 
select new ConfigurationDetails 
{ 
    ConfigurationID = c.ConfigurationID, 
    ConfigurationDescription = c.ConfigurationDescription, 
    Enrolment = configuration.Enrolment, 
    Accepts = configuration.Accepts, 
    Rejects = configuration.Rejects,            
    InComplete = configuration.InComplete 
}).ToList(); 

Answer 1

我不確定你的情況，但'正確的'解決方案是創建存儲過程，並調用它來代替構造這個linq語句。

下面是一篇文章該怎麼辦呢

http://www.entityframeworktutorial.net/EntityFramework4.3/execute-stored-procedure-using-dbcontext.aspx