Question

**Inventory Table**:

StoreNo Date    ProductBarCode  ProductQty
    61  2016-02-28  2017961746012   100
    61  2016-02-29  2017961746012   100
    61  2016-03-01  2017961746012   100
    61  2016-03-02  2017961746012   100
    61  2016-03-03  2017960624045   100
    61  2016-03-04  2017961746012   100
    75  2016-03-04  2017960624045   90
    61  2016-03-05  2017961746012   100

促销表：

    StoreNo     Date         ProductBarCode     SaleQty
        61     2016-02-29    2017961746012          8
        75     2016-03-04    2017960624045          0 
        61     2016-03-01    2017961746012          2
        61     2016-03-04    2017961746012         -5

期望的输出：

StoreNo  Date      ProductBarCode   ProductQty
    61  2016-02-28  2017961746012   100
    61  2016-02-29  2017961746012   92
    61  2016-03-01  2017961746012   90
    61  2016-03-02  2017961746012   90
    61  2016-03-03  2017960624045   100
    61  2016-03-04  2017961746012   95
    75  2016-03-04  2017960624045   90
    61  2016-03-05  2017961746012   93

我希望通过计算带有时间戳的(INVENTORY + ALL ADDITIONAL PRODUCTS COMING IN) - ALL SOLD PRODUCTS来确定实际数字。每月一次采用库存。所以我加入了日历表并显示日期和值。如果我是subtract from i.qty - s.qty它会在那天单独减去销售，如果我再次检查第二天库存将显示100 .. 有人可以建议吗？!!

Answer 1

SELECT i.StoreNo,i.Date,i.ProductBarCode,(i.ProductQty-s.ProductQty) AS ProductQty 
FROM Inventory i 
LEFT JOIN Sale s ON i.ProductBarCode=s.ProductBarCode

当SaleQty on Sale表的值为负时，此查询将该值添加到结果中。如果它是正数，它将减去它。

如果您想在任何情况下减去该值，请使用此查询

SELECT i.StoreNo,i.Date,i.ProductBarCode,(i.ProductQty-ABS(s.ProductQty)) AS ProductQty 
FROM Inventory i 
LEFT JOIN Sale s ON i.ProductBarCode=s.ProductBarCode

Answer 2

select  i.storeno,i.datee,i.productbarcode,
isnull(i.productqty-(select sum(saleqty) as runningsum from #salestable t where t.date<=i.datee and t.storeno=i.storeno),i.productqty) as tproductqty
  from #inventory i
left join
 #salestable s
 on s.storeno=i.storeno
 and s.productbarcode=i.productbarcode
 and s.date=i.datee

输出

storeno  datee     productbarcode   productqty
61      2016-02-28  2017961746012   100
61      2016-02-29  2017961746012   92
61      2016-03-01  2017961746012   90
61      2016-03-02  2017961746012   90
61      2016-03-03  2017960624045   90
61      2016-03-04  2017961746012   95
75      2016-03-04  2017960624045   90
61      2016-03-05  2017961746012   95

如何使用带时间戳的MySQL减去库存和销售

2 个答案: