調試此查詢所需的指針

我試圖調試此查詢沒有任何成功。 IN如果我註釋掉Pt.pt_id_nbr下面的代碼它的工作原理否則查詢保留執行很長一段時間調試此查詢所需的指針

Declare @sAlias   char(1), 
@sGQOrgId char(3), 
@sID   char(12), 
@sType  char(1), 
@sSource char(2), 
@dcLocationId numeric(18, 0) = NULL 

set @sAlias='N' 
set @sGQOrgId ='' 
Set @sID  ='' 
Set @sType  ='M' 
Set @sSource ='MD' 

SELECT DISTINCT 
     '' 'ImportID',d.GQOrgId, d.DeviceId 
     --,isnull(Pt.Pt_id_nbr,0)as Pt_id_nbr 
     --,Pt.pt_id_nbr works if commented out else the query keeps executing for a long time 
     , DeviceDesc = LTRIM(RTRIM(d.DeviceDesc)), d.Source, 
         SourceDesc = LTRIM(RTRIM(s.SourceDesc)) 
     FROM GasQuality.dbo.Device AS d WITH (NoLock) 
     JOIN GasQuality.dbo.SourceCodes AS s WITH (NoLock) 
     ON  s.Source = d.Source 
     left join elm_qa.elm.dbo.pt_sys_xref as Pt WITH (NoLock) 
     ON d.DeviceID = Pt.REF_VAL and (Pt.OLD_SYS_ID = 'PK' and Pt.VAL_TYPE_CD = 'OM') 
     WHERE s.Type = @sType AND 
      d.GQOrgId LIKE RTRIM(@sGQOrgId) + '%' 
      AND d.Source LIKE RTRIM(@sSource) + '%' 
      AND d.DeviceId LIKE RTRIM(@sID) + '%' 

     ORDER BY d.GQOrgId, d.DeviceId, d.Source

來源

2012-11-13 sanika

查看快速運行的查詢和不運行的查詢之間的執行計劃 – HLGEM

我無權查看執行路徑 – sanika

然後，我會嘗試，因爲一組通過，而不是不同。

來源

2012-11-13 17:37:34 Paparazzi

調試此查詢所需的指針

回答

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