将结果总和添加到公式

Question

我试图添加ard.terms_amount的结果并从我的“Open AR”计算中减去该结果。所以在这种情况下，它应该是减去0.90

SELECT 
customer.customer_id 
,customer.customer_name 


,cast(sum(ih.total_amount - ih.amount_paid) as decimal (10,2)) as [Open A/R] 


,cast(dbo.p21_fn_days_sales_outstanding(customer.company_id, customer.customer_id, 90, GETDATE()) as decimal (10,2)) average_dso 
,terms.terms_desc 
,ard.terms_amount 



FROM customer 
INNER JOIN terms ON terms.terms_id = customer.terms_id 
inner join invoice_hdr ih on ih.customer_id = customer.customer_id 
inner join ar_receipts_detail ard on ard.customer_id = customer.customer_id 
WHERE customer.company_id = 'ABC' and customer.customer_id='123456' 
and ih.approved ='y' 


group by customer.customer_id,customer.customer_name,customer.company_id,terms.terms_desc,ard.terms_amount 

Answer 1

所以，你想要做的是把列“terms_amount”的总和，并从列“打开A /总和减去它R'对吗？

您可以设置列两个变量的总和，然后减去两者（请原谅我的语法，有一阵子我用MSSQL，但最近我切换到MySQL的工作）：

declare @terms_amount float; 
declare @OpenA/R float 
set @terms_amount = (select sum(terms_amount) from yourdatabase); 
set @OpenA/R = (select sum(OpenA/R) from yourdatabase); 
select @terms - @OpenA/R; 

我觉得语法是正确的，但是再一次，我还没有使用MSSQL。