如何影響具有多個狀態的where子句中的單個狀態

Question

以下是我的查詢，它返回從年至日的策略計數。我想知道如何處理一個只會影響「活躍」狀態的陳述。

select distinct 
count(pol3.CT_ID + pol3.CT_NSID) as 'YTD', 
pol3.ct_status 
from contract pol3 
where (pol3.CT_Status = 'Quote' or pol3.ct_status='Active' or pol3.ct_status='Declined') 
and Year(pol3.CT_Subscription_Date)>= datediff(year,(DATEADD(yy, DATEDIFF(yy,0,getdate()), 0)), getdate()) 
group by pol3.ct_status 

下面是電流輸出：

我試圖做

select distinct 
count(pol3.CT_ID + pol3.CT_NSID) as 'YTD', 
pol3.ct_status 
from contract pol3 
where (pol3.CT_Status = 'Quote' or pol3.ct_status='Active' or pol3.ct_status='Declined') 
and CT_ORIGINAL_QUOTE_ID is not null 
and CT_ORIGINAL_QUOTE_NSID is not null 
and Year(pol3.CT_Subscription_Date)>= datediff(year,(DATEADD(yy, DATEDIFF(yy,0,getdate()), 0)), getdate()) 
group by pol3.ct_status 

這顯然是錯誤的，因爲它針對所有三種狀態。我如何才能讓ct_original_ *只針對活動狀態？任何線索或指針將不勝感激。

Answer 1

在SELECT中使用CASE語句返回1或0，然後返回SUM值。

SELECT pol3.ct_status, SUM(CASE 
    WHEN ct_status IN ('Declined','Quote') THEN 1 // all of these should count as one policy 
    WHEN ct_status = 'Active' and CT_ORIGINAL_QUOTE_ID is not null and CT_ORIGINAL_QUOTE_NSID is not null THEN 1 // if data in ID and NSID and active count it 
    ELSE 0 // all others count as nothing 
    END) 
from contract pol3 
where (pol3.CT_Status = 'Quote' or pol3.ct_status='Active' or pol3.ct_status='Declined') 
and Year(pol3.CT_Subscription_Date)>= datediff(year,(DATEADD(yy, DATEDIFF(yy,0,getdate()), 0)), getdate()) 
group by pol3.ct_status