序列号为的SQL分组依据

这是我在SQL Server中的表：

Customer_Code   Factor_Number    Factor_Sum
-------------------------------------------
100                10             24500
100                15             12550
102                14             1000
103                18             65500
103                12             1000

我希望SQL Server中的输出不带任何临时表：

Customer_Code   Factor_Count    Factor_Sum   Factor_Number
----------------------------------------------------------
100                2              37050          10,15
102                1              1000           14
103                2              66500          12,18

有人知道我怎么做吗？

在

CTE

中使用

STRING\u AGG（）

，然后再进行

分组

drop table if exists #tmp
create table #tmp (customer_Code int, factor_number int, factor_sum int)

insert into #tmp 
Values 
(100,10,24500),
(100,15,12550),
(102,14,1000),
(103,18,65500),
(103,12,1000)

;with cte
as (
    select customer_Code,STRING_AGG(factor_number,',') as factor_number
    from #tmp
    group by customer_Code)

select t.customer_Code,count(*) as Factor_Count, sum(factor_sum) as factor_sum, c.factor_number
from #tmp t
join cte c on t.customer_Code=c.customer_Code
group by t.customer_Code, c.factor_number

这看起来像是聚合：

select customer_code,
       count(*) as factor_count,
       sum(factor_sum) as factor_sum,
       string_agg(factor_number, ',') within group (order by factor_number) as factor_numbers
from t
group by customer_code;

如果每个客户最多只有两行，那么您甚至不需要
string\u agg（）
：

似乎是一个非常简单的
分组依据
，包含一个
总和
、一个
计数
和一个
字符串_AGG
聚合。根据问题指南，请说明您尝试了什么，并告诉我们您（在本网站或其他地方）发现了什么，以及为什么它不能满足您的需求。
select customer_code,
       count(*) as factor_count,
       sum(factor_sum) as factor_sum,
       concat_ws(',', min(factor_number), nullif(max(factor_number), min(factor_number)))
from t
group by customer_code;