显示余额库存

Question

我有一个查询返回库存详细信息，如下面SQL Server 2008中所示

在特定日期，项目A00001和A00002的库存余额分别为40,120。所以我想分配如下所示的值（按ItemCode，DateofReceipt desc排序）

任何人都可以帮助我如何更新第一个查询结果（我可以将这些值存储到临时表中，如果需要的话）以获得第二个表中的库存余额而不使用游标吗？

提前致谢！

Answer 1

尝试

declare @tb table (itemCode varchar(10),DateofReceipt date,invno varchar(10), inqty int)
    insert into @tb (itemcode,dateofReceipt,invno,inqty) values
    ('A00001','20150401','Inv01',100),
    ('A00001','20150410','Inv03',50),
    ('A00002','20150405','Inv02',100),
    ('A00002','20150415','Inv04',50)

    declare @stock table(item varchar(10),qty int)
    insert into @stock (item,qty) values
    ('A00001',50),('A00002',120)

    ;with cte as (select *,case when row_number() over(partition by itemCode order by DateofReceipt desc )=1 then qty else 0 end as stk,
    row_number() over(order by itemcode, DateofReceipt desc) as rno
    from @tb t inner join @stock s on t.itemCode=s.item),
    ct1 (stock,bls,rno) as (select case when stk<=inqty then stk else inqty end as stock,case when stk<=inqty then 0 else stk-inqty end as bls,rno from cte where rno=1
    union all select case when stk+bls<=inqty then stk+bls else inqty end as stock,case when stk+bls<=inqty then 0 else stk+bls-inqty end as bls,cte.rno from ct1 inner join cte on ct1.rno+1=cte.rno)

    select itemcode,dateofReceipt,invno,inqty,stock from ct1 inner join cte on ct1.rno =cte.rno