沒有選擇 - 從表SQL

Question

我正在從這個SQL Server表項[I1]，並返回到該表作爲- QTY和- TOTAL值..

http://i.stack.imgur.com/bdnPF.png

之後，我有另一行與同一項目ID和- QTY AND -Total

http://i.stack.imgur.com/4vUNP.png

我需要在不退回的產品每一次過濾，

在這種情況下，我已經回到了I1，當我要返售發票。我需要選擇沒有退回產品，

SELECT 
     DEL_PurchasesLines.ItemIdentityCode, 
     SUM(DEL_PurchasesLines.Qty) As Qty, 
     SUM(DEL_PurchasesLines.Total) As Total 

    FROM DEL_PurchasesLines 

    WHERE InvoiceNo = '1' AND DealerCode = 'S0002M' 

    GROUP BY 
     DEL_PurchasesLines.ItemIdentityCode 

    HAVING SUM(DEL_PurchasesLines.Total) > 0 AND SUM(DEL_PurchasesLines.Qty) > 0 

Answer 1

我總是喜歡在tempdb中創建一些測試數據。

-- 
-- Create sample data 
-- 

use tempdb; 
go 

if object_id('items') > 0 
drop table items 
go 

create table items 
(
    id varchar(8), 
    qty int, 
    total int 
); 
go 

insert into items values 
('I1', 2, 4), 
('I2', 3, 6), 
('I3', 5, 10), 
('I1', -2, -4); 
go 

select * from items; 
go 

解決此問題的一種方法是按ID進行分組，總計列數和總數。僅顯示具有> 0的行。

-- 
-- Show lines in which qty * total > 0 
-- 

select id, sum(qty) as sum_qty, sum(total) as sum_total 
from items 
group by id 
having sum(qty) > 0 and sum(total) > 0; 

另一種考慮此問題的方法是顯示所有沒有退貨的訂單。

-- 
-- Show rows that do not have any returns 
-- 

select * 
from items i left join 
(
    select id 
    from items 
    where qty < 0 or total < 0 
) r on i.id = r.id 
where r.id is null