Question

我在为查询解决方案而苦苦挣扎，任何帮助将不胜感激，最终我将自己与模板捆绑在一起，我相信肯定有一种更简单的方法。

我有一个数据库，当前产生以下结果-这是因为它没有联接或生产。

Acc No      |  prod No  | Product Type | product Cost 
12345678           1               Red Toy              £100
12345678           2               Blue Toy             £150
12345678           3               White Toy           £300
12398654           1               White Toy           £300
12398765           1               Red Toy              £100

每个帐户我只希望一行，但不想丢失信息。我还想要一些款项。希望下面的内容可以显示我的意思，尽管会有更多的列：

 Acc No | Prod total | cost | Prod1type | Prod1cost |prod2typ
12345678         3      £550      Red Toy        £100      BlueToy
12398654         1      £300    White Toy       £300        Null

我希望这能解释它。我知道我最终将获得更多专栏，但这将使我的生活变得如此轻松。

任何帮助将不胜感激，

预先感谢

Answer 1

无需考虑添加ProdType，就可以使用此查询。假设表中每行只有1个产品。

select acc_no, count(*) as prod_total, sum(cost) as total_cost
from table
group by acc_no
order by acc_no asc

获得所有ProdType的核心响应acc_no，您可以使用

select distinct prodtype
from table
where acc_no='exact_number'

Answer 2

您可以使用多个case语句来获得预期的输出。

创建示例数据：

select 12345678 as Accno , 1 as prodno, 'Red Toy'   as Producttype , 100 as Cost into #temp union all 
select 12345678 as Accno , 2 as prodno, 'Blue Toy'  as Producttype , 150 as Cost  union all 
select 12345678 as Accno , 3 as prodno, 'White Toy' as Producttype , 300 as Cost  union all 
select 12398654 as Accno , 1 as prodno, 'White Toy' as Producttype , 300 as Cost  union all 
select 12398765 as Accno , 1 as prodno, 'Red Toy'   as Producttype , 100 as Cost

查询：

   select  accno, count(distinct prodno) Prodtotal, sum(cost) totalCost, max(case when prodno = 1 then Producttype end ) Product1type, 
sum (case when prodno = 1 then cost end) Product1cost, max(case when prodno = 2 then Producttype end ) Product2type, 
sum (case when prodno = 2 then cost end) Product2cost,max(case when prodno = 3 then Producttype end ) Product3type, 
sum (case when prodno = 3 then cost end) Product3cost  from #temp 
group by accno

输出：

格式可能会稍有不同，但是我认为这是您的预期输出。

     accno  Prodtotal   totalCost   Product1type    Product1cost    Product2type    Product2cost    Product3type    Product3cost
12345678    3            550         Red Toy         100              Blue Toy    150   White Toy   300
12398654    1            300    White Toy            300               NULL       NULL  NULL    NULL
12398765    1            100    Red Toy              100               NULL NULL    NULL    NULL

SQL清理到一行

2 个答案: