Question

我在sql（密钥ID）中有一个包含4列的表：

ID  Items  Import  Export  
1    A1      1333   0       
2    A1      0     368     
3    A1      0     252      
4    A1      1965   0       
5    A1      0     162     
6    A1      0     551     
7    A1      0     69

我想连续计算库存商品。但不是预期的结果。你可以帮我看到如下结果吗？使用列库存

ID  Items  Import  Export  Inventory
1    A1      1333   0       1333
2    A1      0     368      965
3    A1      0     252      713
4    A1      1965   0       2678
5    A1      0     162      2516
6    A1      0     551      1965
7    A1      0     69       1896

这是我的代码：

Select ID,
(A.Invent + Import-Sum(Export)) as Inventory 
From MyColumn,
(
Select Top 1 (Import - Export) as Invent 
From MyColumn 
Where Items in ('A1')
) as A 

Where Items in ('A1') 

Group by 
A.Invent,
Import,ID

Answer 1

2008年你错过了 sum（），但还有另一种选择

示例

Declare @YourTable Table ([ID] int,[Items] varchar(50),[Import] int,[Export] int) Insert Into @YourTable Values (1,'A1',1333,0) ,(2,'A1',0,368) ,(3,'A1',0,252) ,(4,'A1',1965,0) ,(5,'A1',0,162) ,(6,'A1',0,551) ,(7,'A1',0,69) Select A.* ,B.* from @YourTable A Cross Apply ( Select Inventory = sum(Import-Export) From @YourTable Where Items=A.Items and ID<=A.ID ) B

<强>返回

ID Items Import Export Inventory 1 A1 1333 0 1333 2 A1 0 368 965 3 A1 0 252 713 4 A1 1965 0 2678 5 A1 0 162 2516 6 A1 0 551 1965 7 A1 0 69 1896

Answer 2

使用连接
也是窗口功能，但这在2008年不可用

declare @T table (id int identity primary key, import int, export int);
insert into @T (import, export) values 
       (1333,  0)
     , (0, 368)
     , (0, 252)
     , (1965, 0)
     , (0, 162)
     , (0, 551)
     , (0 , 69);

select t1.id, t1.import, t1.export 
     , sum(t2.import - t2.export) AS inven
from @T t1
join @T t2 
  on t2.id <= t1.id 
group by t1.id, t1.import, t1.export 
order by t1.id

select * 
     , sum(import - export) over (order by t.id) as inven 
from @T t;

id          import      export      inven
----------- ----------- ----------- -----------
1           1333        0           1333
2           0           368         965
3           0           252         713
4           1965        0           2678
5           0           162         2516
6           0           551         1965
7           0           69          1896

在表格中导出和导入库存仓库

2 个答案: