Question

所以我似乎无法找到具体的答案

在我们的订购系统中，客户希望获得一份显示产品和每月订购数量的报告

报告列如下所示

项目，1月，2月，3月

每个月下的

将是该月订购的总数量

以下是我目前的代码，仅显示1月的订单

SELECT
[Order].Date
, CONVERT(CHAR(12), DATENAME(MONTH, [Order].Date)) as 'Month'
, ISNULL([order].TotalQuantity, [order].UnitQtysQtyPerUnit*[order].Quantity) as 'Quantity'
, [Order].Productname as 'Product'
FROM [Order] 
LEFT OUTER JOIN CartTransaction ON CartTransaction.CartTransaction_Id = [Order].CartTransaction_Id
LEFT OUTER JOIN Customer ON Customer.Customer_Id = [Order].Customer_Id
LEFT OUTER JOIN CostCentre ON CostCentre.CostCentre_Id = [Order].CostCentre_Id
where CustomerName = 'Customer A' and [Order].Date between '2017-01-01' and '2017-01-31'

Answer 1

如果您要生成报告，则应该让报告层处理数据透视，但您可以按month汇总数据，如下所示：

select
    dateadd(month, datediff(month, 0, [Order].Date ), 0) as 'MonthDate'
  , convert(char(12),datename(month, [Order].Date)) as 'Month'
  , sum(isnull([order].TotalQuantity, [order].UnitQtysQtyPerUnit*[order].Quantity)) as 'Quantity'
  , [Order].Productname as 'Product'
from [Order] 
  left outer join CartTransaction
    on CartTransaction.CartTransaction_Id = [Order].CartTransaction_Id
  left outer join Customer
    on Customer.Customer_Id = [Order].Customer_Id
  left outer join CostCentre
    on CostCentre.CostCentre_Id = [Order].CostCentre_Id
where CustomerName = 'Customer A' 
  and [Order].Date between '2017-01-01' and '2017-01-31'
group by 
    dateadd(month, datediff(month, 0, [Order].Date ), 0)
  , convert(char(12),datename(month, [Order].Date))
  , [Order].ProductName
order by dateadd(month, datediff(month, 0, [Order].Date ), 0)

Answer 2

不要假设我们熟悉数据结构，请提供有关该问题的更多信息。

你最可能缺少的是分组。您必须按项目和日期分组，并获得每月totalQuantity的计算TotalSum。

草图：

Select o.ProductName, o.Date, Sum(o.TotalQuantity) as Quantity
From order o, Carttrans ct, customer c, costCent cc
where o.cartTransaction_id = ct.CartTransaction_id
and c.customer_id = o.customer_id
And cs.costcentre_id = o.costcentre_id
And customerName = '...'
and o.Date between ....
Group by o.ProductName and o.Date

SQL组和总和

2 个答案: