SQL查询 - 如何删除表假脱机

Question

我正在尝试微调以下查询以删除表假脱机。它有1000万条记录。我在下面给出了我的执行计划。

查询：

SELECT          
    ATT.EMPCODE 
   ,ATT.EMPNAME
   ,ATT.FROMDATE
   ,ISNULL(EMPPER.FIRST_NAME.'')  
   ,ISNULL(EMPPER.MIDDLE_NAME.'') 
   ,ISNULL(EMPPER.LAST_NAME.'')
   ,DET.[SUPERVISOR]
   ,ATT.[DEPARTMENT]
   ,SHI. [SHIFT TIME]
   ,DET.IN_TIME
   ,LAT.UT_TIME
   ,SHI.SHIFT_NAME
   ,PRO.[ACTUAL_TIME]
   ,LAT.[LATE]
FROM
    Attendance ATT
    INNER JOIN        [172.241.2.147].HIST_DATT.DBO.EMPLOYEE EMP 
       ON ATT.N_ID=ATT.EMPID
    LEFT JOIN   
        (SELECT * 
         FROM [172.241.2.147].HIST_DATT.DBO.VIEW_ATTENDANCE_DETAILS 
         WHERE TODATE BETWEEN 'NOV 01 2016' AND 'NOV 15 2016'
        ) DET 
        ON ATT.N_ID=DET.N_ID AND ATT.FROMDATE=DET.TODATE
    LEFT JOIN   
        (SELECT * 
         FROM [172.241.2.147].HIST_DATT.DBO.VIEW_EMPLOYEE_SHIFT 
         WHERE TODATE BETWEEN 'NOV 01 2016' AND 'NOV 15 2016'
        ) SHI 
       ON ATT.N_ID=SHI.N_ID 
          AND ATT.FROMDATE=SHI.TODATE
    LEFT JOIN   
        (SELECT * 
         FROM [172.241.2.147].HIST_DATT.DBO.PROCESSDETAILS 
         WHERE TODATE BETWEEN 'NOV 01 2016' AND 'NOV 15 2016'
        ) PRO 
        ON ATT.N_ID = D.N_ID 
           AND ATT.FROMDATE=D.TODATE
    LEFT JOIN    
        (SELECT * 
         FROM [172.241.2.147].HIST_DATT.DBO.LATETIME 
         WHERE TODATE BETWEEN 'NOV 01 2016' AND 'NOV 15 2016'
        ) LAT 
        ON ATT.N_ID=E.N_ID AND ATT.FROMDATE=E.FROMDATE
        LEFT OUTER JOIN    [172.241.2.147].HIST_DATT.DBO.VIEW_LEAVE_STATUS LEV 
            ON LEV.N_ID=ATT.N_ID AND ATT.FROMDATE=LEV.FROMDATE 
        LEFT OUTER JOIN  [172.241.2.147].HIST_DATT.DBO.REPORTS RPT 
            ON ATT.N_ID=R.N_ID
        LEFT JOIN   [172.241.2.147].HIST_DATT.DBO.EMPLOYEE_DETAIL EDTS H 
            ON R.RM_ID=H.N_ID       
        LEFT JOIN  [172.241.2.147].HIST_DATT.DBO.EMPLOYEE_PERSONAL EMPPER Z ON ATT.N_ID=Z.N_ID AND ATT.FROMDATE =Z.FROMDATE
WHERE 1=1
ORDER BY 
     ATT.N_ID
    ,ATT.FROMDATE
     OPTION (QUERYTRACEON 8690)

执行计划：