SQL Server 2016：如何获取单行视图

我一直试图正确地表达这一点，但以下是我的dbfiddle

表：

    Customerkey int NOT NULL PRIMARY KEY,
    processdate date NULL,
    CCcount int NULL,
    CHKcount int NULL,
    SACount int NULL
);

INSERT INTO products 
(Customerkey, processdate, CCcount, CHKCount, SACount) 
VALUES
(101,'20210501', 12,3,5),
(102,'20210203', 1,3,1),
(103,'20190412', 4,0,2)

SELECT  CustomerKey,  processdate,
ProductMix=STUFF  
(  
     (  
       SELECT distinct ',' + str(CCcount)  + ',' + str(CHKCount)   +  ',' + str(SACount)
       FROM products t2 
       WHERE t2.CustomerKey = t1.CustomerKey   
       and t2.processdate = t1.processdate
        ),1,1,''  
)  
FROM products t1  
GROUP BY CustomerKey,  processdate

SELECT CustomerKey, processdate,
concat(
Case when CCcount >' ' then 'CCcount' 
when CHKCount > '' then 'CHKCount'
when SACount > '' then 'SACount'
end, '') as Product_Mix_Expanded
from products

预期输出：

CustomerKey	处理日期	Product_Mix	Product_Mix_Expanded
101	2021-05-01	12，3，5	CCcount、CHKCount、SACount
102	2021-02-03	1，3，1	CCcount、CHKCount、SACount
103	2019-04-12	4，0，2	计数、存储计数

如您所见，我使用了一些东西，但不确定这是否是正确的方法。我需要的产品组合显示的计数和产品组合在文字格式扩展。 如果您需要更多的信息，请随时提问。提前谢谢您。

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解决方案

根据您的样本数据和预期结果，您是否可以执行以下操作？

select CustomerKey, ProcessDate, Concat(CCcount,',',CHKcount,',',SACount) Product_Mix, 
    Concat(case when CCcount>0 then 'CCcount' else '' end,', ',
    case when CHKcount>0 then 'CHKcount' else '' end, ', ',
    case when SACount>0 then 'SACount' else '' end) Product_Mix_Expanded
from products