SQL查詢修改/優化

Question

我想弄清楚如何將這3個查詢合併爲一個百分比列，我還沒有弄清楚。任何人都可以協助

Select DISTINCT a.ASSN As Association, SUM(tonnage_adjusted) as TotalTonnage   
From DeliveryTons d INNER JOIN ReapingGroups a ON d.reaping_code = a.REAPING_GROUP_CODE 
WHERE reaping_code IS NOT NULL 
Group By a.ASSN 
ORDER BY Association 


Select DISTINCT a.ASSN As Association, SUM(tonnage_adjusted) as Monitored  
From DeliveryTons d INNER JOIN ReapingGroups a ON d.reaping_code = a.REAPING_GROUP_CODE 
WHERE remarks = '' AND reaping_code IS NOT NULL 
Group By a.ASSN 
ORDER BY Association 


Select DISTINCT a.ASSN As Association, SUM(tonnage_adjusted) as NotMonitored   
From DeliveryTons d INNER JOIN ReapingGroups a ON d.reaping_code = a.REAPING_GROUP_CODE 
WHERE remarks = 'NO_TICKET' AND reaping_code IS NOT NULL 
Group By a.ASSN 
ORDER BY Association 

Answer 1

這應該起作用。

With Summary as (
    Select a.ASSN As Association 
      ,SUM(tonnage_adjusted) as TotalTonnage 
      ,SUM(case when remarks = '' THEN tonnage_adjusted ELSE NULL END) as Monitored 
      ,SUM(case when remarks = 'NO_TICKET' THEN tonnage_adjusted ELSE NULL END) as NotMonitored 
    From DeliveryTons d 
    INNER JOIN ReapingGroups a 
    ON d.reaping_code = a.REAPING_GROUP_CODE 
    WHERE d.reaping_code IS NOT NULL 
    Group By a.ASSN 
    ) 

SELECT Association 
     ,TotalTonnage 
     ,Monitored 
     ,NotMonitored 
     ,((Monitored/TotalTonnage) * 100) as pct_Monitored 
    FROM Summary 
    Order by Association