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我想在 hana studio 中制作一个计算视图，我必须在其中维护库存中待处理的产品的老化。

它将按先到先得的方式减去...我的意思是在产品 P001 的情况下，然后 5500 将首先减去 1000，然后余额数量将减去 2000，依此类推，直到为零。 下面是交易表。

Department  |Product  | Date               | Quantity  |Indicator
------------+---------+--------------------+-----------+---------
D001        |P001     | 01-Jul-2017        | 1000      |ADD
D001        |P001     | 10-Jul-2017        | 2000      |ADD
D001        |P001     | 15-Jul-2017        | 3000      |ADD
D001        |P001     | 16-Jul-2017        | 2000      |ADD
D001        |P001     | 18-Jul-2017        | 5500      |SUBTRACT
D001        |P002     | 12-Jul-2017        | 3000      |ADD
D001        |P002     | 14-Jul-2017        | 2000      |ADD
D001        |P002     | 15-Jul-2017        | 4000      |SUBTRACT

最终的输出应该是这样的。如果今天的日期是 2017 年 7 月 31 日

Department  |Product  | Date               | Quantity  |AgeinginDays
------------+---------+--------------------+-----------+---------
D001        |P001     | 15-Jul-2017        | 500       |16
D001        |P001     | 16-Jul-2017        | 2000      |15
D001        |P002     | 14-Jul-2017        | 1000      |17
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1 回答 1

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我创建了 Inventory 表并用您的示例数据填充了它。这是用于此的 SQL 代码。当您将来寻求帮助时，请尝试分享此类元数据:)

create column table InventoryItems
(
Department varchar(10),
Product varchar(10),
Date date,
Quantity int,
Indicator varchar(10)
);
insert into InventoryItems select 'D001','P001','20170701',1000,'ADD' from dummy;
insert into InventoryItems select 'D001','P001','20170710',2000,'ADD' from dummy;
insert into InventoryItems select 'D001','P001','20170715',3000,'ADD' from dummy;
insert into InventoryItems select 'D001','P001','20170716',2000,'ADD' from dummy;
insert into InventoryItems select 'D001','P001','20170718',5500,'SUBTRACT' from dummy;
insert into InventoryItems select 'D001','P002','20170712',3000,'ADD' from dummy;
insert into InventoryItems select 'D001','P002','20170714',2000,'ADD' from dummy;
insert into InventoryItems select 'D001','P002','20170715',4000,'SUBTRACT' from dummy;

示例表和数据准备好后，我准备了以下用于老化的 SQLScript 代码。由于可能难以理解和遵循代码，我分享了您的问题并在 SAP HANA 数据库上的库存老化 SQL 计算中提供了详细的解决方案

这是帮助您满足要求的 SQL 代码

with Ins as (
    select 
        row_number() over (partition by Product order by date) as AddId,
        *,
        sum(Quantity) over (partition by Product order by Date rows unbounded preceding) as sumIn,
        sum(Quantity) over (partition by Product order by Date desc rows unbounded preceding) as sumX
    from InventoryItems 
    where 
        Indicator = 'ADD'
), Outs as (
    select 
        row_number() over (partition by Product order by date) as AddId,
        *,
        sum(Quantity) over (partition by Product order by Date rows unbounded preceding) as sumOut
    from InventoryItems 
    where 
        Indicator = 'SUBTRACT'
), Inv as (
    select
        ins.Product, max(sumIn) - max(ifnull(sumOut,0)) as inv
    from Ins
    left join Outs
        on ins.Product = outs.Product
    group by ins.Product
), calc as (
    select
        Ins.*,
        Inv.inv,
        inv-sumx as diff
    from Ins
    left join Inv 
        on ins.Product = inv.Product
)
select
    Department, Product, Date, 
    case when diff > 0 then quantity else quantity-abs(diff) end as Quantity,
    DAYS_BETWEEN(Date,current_date) as AgeingInDays
from (
    select *, 1 as rn from calc where diff >= 0
    union all
    (
        select * from (
            select 
                *, row_number() over (partition by Product order by diff desc) as rn 
            from calc 
            where diff < 0
        ) t where rn = 1
    )
)
order by Product, AddId

这是上述 SQL 块执行的输出 在此处输入图像描述

我希望它有所帮助，

于 2017-11-28T07:56:50.130 回答