优化SQL Server 2012查询

我有一个查询，运行了12个小时。

该查询确实对5个表进行了左联接，并报告了一系列每月指标。这是查询：

SELECT DATEPART(YYYY,Referral_dt) AS RefYear, DATEPART(MM,Referral_dt) AS RefMonth, 
        CASE 
            WHEN CAST(Referral_dt as date) BETWEEN '1/1/2013' AND '4/14/2013' THEN 'Q1' 
            WHEN CAST(Referral_dt as date) BETWEEN '4/15/2013' AND '7/14/2013' THEN 'Q2'
            WHEN CAST(Referral_dt as date) BETWEEN '7/15/2013' AND '9/30/2013' THEN 'Q3' 
            WHEN CAST(Referral_dt as date) BETWEEN '10/1/2013' AND '12/31/2013' THEN 'Q4'
            WHEN CAST(Referral_dt as date) BETWEEN '1/1/2014' AND '4/14/2014' THEN 'Q1' 
            WHEN CAST(Referral_dt as date) BETWEEN '4/15/2014' AND '7/14/2014' THEN 'Q2'
            WHEN CAST(Referral_dt as date) BETWEEN '7/15/2014' AND '9/30/2014' THEN 'Q3' 
            WHEN CAST(Referral_dt as date) BETWEEN '10/1/2014' AND '12/31/2014' THEN 'Q4'
        ELSE 'X' END as RefQtr, 
        crm.salesstatuscode, crm.Referral_State, crm.lead_source, mp.mcc_desc, mp.mcc_industry, sr.manager_name, sr.payrollname, 
        sr.region as Sales_Region,sr.market as Sales_Market, sr.saleschannel as SalesChannel, Bk.SuperRegion_Name as Bank_SuperRegion, 
        Bk.Region_Name as Bank_Region ,Bk.Division_Name as Bank_Division,
        sum(case when crm.referral_state = 'Won' then 1 else 0 end) as referrals_won, sum(sv.projected_profit) as prj_profit,
        sum(case when mp.proposal_Date is null then 0 else 1 end) as proposals_created, sum(ac.signed_annual_volume) as total_signed_volume,  
        sum(case when ac.Acct_Act_Date is null then 0 else 1 end) as activated_accounts, COUNT(*)  as referral_count
        into moagg1
FROM kaiserver.dbKAI.dbo.Referrals_CRM CRM 
     LEFT JOIN (SELECT p.merchant_id, CAST(p.proposal_create_dt as date) as Proposal_Date, m.mcc_desc, m.mcc_industry 
                from kaiserver.[dbKAI].[dbo].[proposals] p 
                left join (SELECT mcc, mcc_desc, mcc_industry from kaiserver.[dbKAI].[dbo].[merchantcategorycode]) m
                 on p.mcc = m.mcc where datepart(yyyy,proposal_create_dt) in ('2013', '2014')) mp
      ON crm.merchant_id = mp.merchant_id
     LEFT JOIN (SELECT account_no, CAST(Account_Activate_dt as date) as Acct_Act_Date, signed_annual_volume, average_tkt
                from kaiserver.[dbKAI].[dbo].[Account]
                where current_ind=1 and datepart(yyyy,account_submit_dt) in ('2013', '2014')) ac
     ON crm.account_no = ac.account_no
     LEFT JOIN (SELECT e1.repid, e1.repcode, e1.payrollname, e1.salesmanager, e2.payrollname as manager_name,
            e1.region,e1.market, e1.saleschannel
             FROM   [fdserver].fdms.[dbo].[tbl_reps] e1 LEFT JOIN [fdserver].fdms.[dbo].[tbl_reps] e2 
                    ON e1.salesmanager = e2.repid
             WHERE e1.market not like ('%TEST%') and e1.payrollname is not null and e1.region is not null and e1.market is not null) SR 
     ON CRM.Sales_Rep_Cd = SR.Repcode
     LEFT JOIN (SELECT [AU_name], [AU_Code] ,[SuperRegion_Name], [Region_Name] ,[Division_Name],
                    [SubDivision_Name] ,[District_Name] ,[SubDistrict_Name]
             FROM kaiserver.[dbKAI].[dbo].[BankAU_Hierarchy]
             WHERE [Reporting_Interval_Id] = '201410') BK 
    ON CRM.referral_au = BK.AU_code
    LEFT JOIN (select merchantnumber, projected_profit from kaiserver.[dbKAI].[dbo].[SoldVolumeDetail]) sv
    ON crm.account_no = sv.merchantnumber
    WHERE DATEPART(YYYY, Referral_dt) in ('2013', '2014')
          AND (crm.salesstatuscode <> 'DUPL' or crm.salesstatuscode is null) 
          AND crm.lead_source not in ('Test Lead', 'Bank Lead Placeholder')
    group by DATEPART(YYYY,Referral_dt), DATEPART(MM,Referral_dt), crm.Referral_State, crm.salesstatuscode, crm.lead_source, mp.mcc_desc, 
    mp.mcc_industry, sr.manager_name, sr.payrollname, sr.region,sr.market, sr.saleschannel, Bk.SuperRegion_Name, Bk.Region_Name ,Bk.Division_Name,
    CASE 
        WHEN CAST(Referral_dt as date) BETWEEN '1/1/2013' AND '4/14/2013' THEN 'Q1' 
        WHEN CAST(Referral_dt as date) BETWEEN '4/15/2013' AND '7/14/2013' THEN 'Q2'
        WHEN CAST(Referral_dt as date) BETWEEN '7/15/2013' AND '9/30/2013' THEN 'Q3' 
        WHEN CAST(Referral_dt as date) BETWEEN '10/1/2013' AND '12/31/2013' THEN 'Q4'
        WHEN CAST(Referral_dt as date) BETWEEN '1/1/2014' AND '4/14/2014' THEN 'Q1' 
        WHEN CAST(Referral_dt as date) BETWEEN '4/15/2014' AND '7/14/2014' THEN 'Q2'
        WHEN CAST(Referral_dt as date) BETWEEN '7/15/2014' AND '9/30/2014' THEN 'Q3' 
        WHEN CAST(Referral_dt as date) BETWEEN '10/1/2014' AND '12/31/2014' THEN 'Q4'
    ELSE 'X' END

当我如上所述运行完整查询时，它将运行12个小时。但是当我运行查询1个月时，它在8分钟内运行。因此，我想每个月运行一次查询并将其追加到一个文件中。这将使此查询在2-3小时内运行。

我可以使用union和复制代码24次，但这似乎并不是最好的方法。有没有更多的编程方式可以做到这一点？

更新：我希望能够每天运行此查询以更新最近一个月的数字。