sql-server - 获取客户的待处理发票

Question

我有两张桌子。

tbl_Invoice

tbl_Payment

我想要的是List of Pending/Partial Invoices一个特定的客户。

我尝试过的是：

Select * from tbl_Invoice I 
    left join tbl_payment P on (I.client_id = P.client_id 
        AND I.invoice_id <> P.invoice_Id)
    left join tbl_client C on I.client_id = C.client_id
    WHERE I.client_id = 8

但它给了我一些错误的输出。

Invoice No  Client Name Date    details             Amount  Paid
----------------------------------------------------------------
ATPL00001   Vishal  10 Dec,2012 Web Designing       100.00  50.00
ATPL00001   Vishal  10 Dec,2012 Web Designing       100.00  10.00
ATPL00001   Vishal  10 Dec,2012 Web Designing       100.00  100.00
ATPL00001   Vishal  10 Dec,2012 Web Designing       100.00  100.00
ATPL00002   Vishal  07 Dec,2012 Software Development        1000.00

所以我不知道如何获得待处理/部分支付的发票。

谁能帮忙啊！！

Answer 1

试试这个（您可以根据需要向发票表中的第二个选择查询添加更多列）

;WITH cte (clientid, invoiceid,  amountPaid)
As
(
   Select client_id clientId, invoice_id invoiceId,  sum(amt) amountPaid
   From tbl_Payment
   Where client_id = @YourClientId
   Group by invoice_id, client_id
)
Select client_id, invoice_id, (total_Price - Isnull(amountPaid,0)) toBePaid
From tbl_invoice I Left join cte On I.clinet_id = cte.clientId 
           And I.invoice_id = cte.invoiceid
Where (total_Price - Isnull(amountPaid,0)) > 0

Answer 2

Select invoice_ID,Client,total_price - Coalesce(AMT,0) as [open]
from
(
select invoice_ID,Client,total_price
,(Select sum(AMT) as AMT from tbl_Payment where tbl_Payment.invoice_ID=tbl_Invoice.invoice_ID) as payed
 from tbl_Invoice left join tbl_client C on tbl_Invoice.client_id = C.client_id
 ) a
 where total_price - Coalesce(AMT,0)>0