SQLクエリの変更/最適化

Question

私はこれらの3つのクエリを、私が把握できなかった割合の列を持つものにする方法を理解しようとしています。誰も助けることができますか？

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

これは機能するはずです。

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