Question

我已经写了这个查询。它可以工作，但是 TotalCost 对于不同的参数保持不变。我希望它相应地更改其值。当前，它采用所有行的总和，但只应采用查询返回的行的总和。

alter PROCEDURE [dbo].[ServicesDetailedReportPartyWise] 

        @FromDate date= '01/Jun/2010',
        @ToDate date= '01/Oct/2018',
        @PartyName varchar(20)='B'

AS
BEGIN
        Set @ToDate= ISNULL(@ToDate, getdate());

        Select inv.InvoiceNo, Convert(varchar(11),inv.EntryDateTime,106) as EntryDateTime, s.ServiceName, c.VehicleRegNo, inv.ServicePrice, c.CustomerName, inv.Party as PartyName,
        inv.fk_BookingID, t.TotalCost, SUM(t.TotalCost) over () as TotalRevenue, ISNULL(SUM(inv.OwnerCommission) over(),0) as TotalCommission, ISNULL(inv.OwnerCommission,0) as Commission
        from dbo.[Services] s
        inner join invoices inv
        on inv.fk_ServiceID= s.ServiceID
        inner join customers c
        on c.CustomerID= inv.fk_CustomerID
        Cross join (Select SUM(inc.ServicePrice) as TotalCost from dbo.Invoices inc) t
        where inv.Party= @PartyName AND (convert(date, inv.EntryDateTime) between @FromDate and @ToDate)
        order by inv.EntryDateTime desc


END

Answer 1

TotalCost是t.TotalCost，其中t的定义是：

(Select SUM(inc.ServicePrice) as TotalCost from dbo.Invoices inc) t

此子查询根本没有过滤，它只是整个dbo.Invoices表中的总和-它是一个单元格，然后您已将其交叉连接到所有行。

所以：这就是为什么它没有改变。

如果您希望总和超过inv，则需要对各组进行分组和求和。

Answer 2

您的cross join对过滤不进行任何操作，如果要这样做，则需要进行类似于outer query的过滤。

其他选择是应用 window 函数：

select inv.InvoiceNo, Convert(varchar(11),inv.EntryDateTime,106) as EntryDateTime, 
       s.ServiceName, c.VehicleRegNo, inv.ServicePrice, c.CustomerName, inv.Party as PartyName,
       inv.fk_BookingID, 
       sum(inv.TotalCost) over (partition by . . .) as TotalCost, 
       sum(inv.TotalCost) over () as TotalRevenue, 
       isnull(sum(inv.OwnerCommission) over(), 0) as TotalCom
       mission, isnull(inv.OwnerCommission,0) as Commission
 . . .

为什么我的查询返回所有行的总和而不是唯一匹配的行？

2 个答案: