如何在SQL查詢中按組計數行

Question

我有一個SQL查詢，它返回包含報價類型和客戶信息的數據。有4種類型的引號（Open，Dead，Requote，Project）。我希望能夠爲每個客戶計算每種類型。也算總數。我還沒有找到一種方法來實現這一點。

最終，我希望通過SSRS報告進行衡量，以便我們可以確定有多少報價（百分比）最終轉化爲項目。

我在我的搜索中找不到任何有效的東西。提前感謝您的任何建議。

Answer 1

使用CTE的

WITH quoteTotal as (
     Select customer, count(*) as customer_total 
     from customer 
     group by customer 
), 
typeQuote as (
     Select customer, quote_type, count(*) as quote_total 
     from customer 
     group by customer, quote_type 
) 
SELECT T.customer, T.quote_type, T.quote_total, Q.customer_total 
FROM typeQuote T 
INNER JOIN quoteTotal Q 
    ON T.customer = Q.customer 

我想利用窗口函數可以很容易。

SELECT DISTINCT 
     customer, 
     quote_type, 
     COUNT(*) OVER (partition by customer, quote_type order by customer) as type_total, 
     COUNT(*) OVER (partition by customer order by customer) as customer_total 
FROM customers 

Answer 2

對於如下的數據：

我已經執行下面

select CustomerEntityId,QuoteType, 
(select count(QuoteType) from Customers c 
    where c.QuoteType=Customers.QuoteType 
     and c.CustomerEntityId=customers.CustomerEntityId 
    group by CustomerEntityId,QuoteType) as QuoteTypeTotal, 
(select count(*) from Customers c1 
    where c1.CustomerEntityId=Customers.CustomerEntityId 
    group by CustomerEntityId) as CustomerTotal 
from Customers 
Group By CustomerEntityId,QuoteType 
Order By CustomerEntityId 

結果查詢是如下：

我希望它有幫助。