使用sql server优化查询

Question

我有以下查询。执行需要15分钟。这太慢了。

有没有办法优化它？

查询

SELECT
 Id,Fees,WeekOfMonth,CONVERT(NVARCHAR(MAX), StartDate, 103) AS StartDate,CONVERT(NVARCHAR(MAX), EndDate, 103) AS EndDate,'Temp Fees                      ' AS FeesName 
  ,@MonthName AS [MonthName]
  INTO ##TempFeesMonthly
  from
  (
SELECT DISTINCT 
1 as Id,sum(((CNTI_THPAYE *(CNTI_THFACT / CNTI_THPAYE)) *
(CASE WHEN CNTI_DURHEBDO IS NULL THEN 1 ELSE CNTI_DURHEBDO/5 END)*@NumberOfDays)) AS Fees,WeekOfMonth,StartDate,EndDate
FROM SCHHAYS.dbo.WTVTAT TAT
      LEFT JOIN
    SCHHAYS.dbo.WTTIEINT INT 
        ON (
            TAT.TIE_ID = INT.TIE_ID
        ) 
        AND (
            TAT.VTAT_IORDRE = INT.TIEI_ORDRE
        )     
    LEFT JOIN
    SCHHAYS.dbo.PYCONTRAT CC 
        ON TAT.PER_ID = CC.PER_ID 
        AND TAT.CNT_ID = CC.CNT_ID     
    LEFT JOIN
    SCHHAYS.dbo.CMTIERS T 
        ON TAT.TIE_ID = T.TIE_ID    
    LEFT JOIN
    SCHHAYS.dbo.WTMISS M 
        ON CC.PER_ID = M.PER_ID 
        AND CC.CNT_ID = M.CNT_ID     
    LEFT JOIN
    ##WTCNTIWeek COT1 
        ON M.PER_ID = COT1.PER_ID 
        AND M.CNT_ID = COT1.CNT_ID    
    INNER JOIN
    SCHHAYS.dbo.WTPRH AS PRH 
        ON M.PER_ID = PRH.PER_ID 
        AND M.CNT_ID = PRH.CNT_ID 
        AND M.TIE_ID = PRH.TIE_ID     
    INNER JOIN
    ##tempStartEndWeekDates AS Tsed 
        ON     PRH_DTEDEBSEM>=Tsed.StartDate 
        AND PRH_DTEFINSEM<=Tsed.EndDate     
    LEFT JOIN
    SCHHAYS.dbo.WTSCCT C 
        ON CC.RGPCNT_ID = C.RGPCNT_ID 
        AND CC.PER_ID = C.PER_ID 
        AND CC.CNT_ID = C.CNT_ID   
    INNER JOIN
    ##TempHaysStaffWeek HF 
        ON C.VAPO_CODE = HF.onetouch  COLLATE Latin1_General_CI_AS
group by
WeekOfMonth,StartDate,EndDate)t

--CREATE INDEX IDX_TempFeesMonthly ON ##TempFeesMonthly(WeekOfMonth)
--Calcul Temp Margin 
UNION ALL
--INSERT INTO ##TempFeesMonthly(Id,Fees,WeekOfMonth,StartDate,EndDate,FeesName,[MonthName])
SELECT
 2,  sum(Fees) AS Fees  ,WeekOfMonth,CONVERT(NVARCHAR(MAX), StartDate, 103) AS StartDate,CONVERT(NVARCHAR(MAX), EndDate, 103) AS EndDate,'Temp Margin ' AS FeesName 
  ,@MonthName AS [MonthName]
  from
  (
 SELECT DISTINCT 
sum((CASE WHEN CNTI_DURHEBDO IS NULL THEN 1 ELSE CNTI_DURHEBDO/5 END)*@NumberOfDays)-(CNTI_THPAYE *(CASE WHEN CNTI_DURHEBDO IS NULL THEN 1 ELSE CNTI_DURHEBDO/5 END)*1.453*1.21*@NumberOfDays) AS Fees,WeekOfMonth,StartDate,EndDate
FROM SCHHAYS.dbo.WTVTAT TAT
      LEFT JOIN
    SCHHAYS.dbo.WTTIEINT INT 
        ON (
            TAT.TIE_ID = INT.TIE_ID
        ) 
        AND (
            TAT.VTAT_IORDRE = INT.TIEI_ORDRE
        )     
    LEFT JOIN
    SCHHAYS.dbo.PYCONTRAT CC 
        ON TAT.PER_ID = CC.PER_ID 
        AND TAT.CNT_ID = CC.CNT_ID     
    LEFT JOIN
    SCHHAYS.dbo.CMTIERS T 
        ON TAT.TIE_ID = T.TIE_ID    
    LEFT JOIN
    SCHHAYS.dbo.WTMISS M 
        ON CC.PER_ID = M.PER_ID 
        AND CC.CNT_ID = M.CNT_ID     
    LEFT JOIN
    ##WTCNTIWeek COT1 
        ON M.PER_ID = COT1.PER_ID 
        AND M.CNT_ID = COT1.CNT_ID    
    INNER JOIN
    SCHHAYS.dbo.WTPRH AS PRH 
        ON M.PER_ID = PRH.PER_ID 
        AND M.CNT_ID = PRH.CNT_ID 
        AND M.TIE_ID = PRH.TIE_ID     
    INNER JOIN
    ##tempStartEndWeekDates AS Tsed 
        ON     PRH_DTEDEBSEM>=Tsed.StartDate 
        AND PRH_DTEFINSEM<=Tsed.EndDate     
    LEFT JOIN
    SCHHAYS.dbo.WTSCCT C 
        ON CC.RGPCNT_ID = C.RGPCNT_ID 
        AND CC.PER_ID = C.PER_ID 
        AND CC.CNT_ID = C.CNT_ID   
    INNER JOIN
    ##TempHaysStaffWeek HF 
        ON C.VAPO_CODE = HF.onetouch  COLLATE Latin1_General_CI_AS
group by
WeekOfMonth,StartDate,EndDate,CNTI_THPAYE,CNTI_DURHEBDO)t
GROUP BY WeekOfMonth,StartDate,EndDate