存儲過程來計算並返回兩行（信用/借記卡）

Question

我一直在爲一個我繼承的財務系統的報告工作，而且代碼真的是一團糟。目前，當前的代碼執行多個查詢並執行過程來構建公用列表，然後將其用作DevExpress網格控件的數據源。在應用程序的其他部分工作之後，我發現在數據庫中執行所有的計算要高效得多，因爲它們相當基礎。檢索和操縱數字一直很簡單，但我暫時試圖完成報告的最後一部分：分類賬。

本質上，我需要執行計算，並根據值爲正值或負值，將這些值顯示在兩行之一（借方或貸方）中。僅僅學習了存儲過程之後，我就陷入瞭如何做到這一點。我有我的代碼和所有聲明的變量「設置」，但我不知道如何「分配」他們的行，因爲沒有這個表，我真的不知道我會如何去解決這個問題。

任何人都可以引導我正確的方向？我並不是要求某人爲我編碼，我不知道如何定義爲了研究方法需要做什麼。

下面是輸出正確的數字，但都在一排當前select語句：

set @OpeningBalance = -3; /**some real calculations here**/ 


if @OpeningBalance is null 
    begin 
     set @OpeningBalance = 0 
    end; 

set @ReserveAmount = 569119.60; /**in place of the real calculations **/ 

set @ReserveTotal = (@OpeningBalance + @ReserveAmount); 

set @ReserveRate = 0.25; /**in place of the select statement calculations **/ 

set @RequiredReserve = (@ReserveAmount); 

set @ReserveRefund = (@ReserveTotal - @RequiredReserve); 

set @UnfinancedInvoices = 21026087.59; /**in place of the real calculations **/ 

set @ReserveBalance = (@RequiredReserve + @UnfinancedInvoices); 

SELECT @OpeningBalance as 'OpeningBalance', 
     @ReserveAmount as 'ReserveAmount', 
     @ReserveTotal as 'ReserveTotal', 
     @ReserveRate as 'ReserveRate', 
     @RequiredReserve as 'RequiredReserve', 
     @ReserveRefund as 'ReserveRefund', 
     @UnfinancedInvoices as 'UnfinancedInvoices', 
     @ReserveBalance as 'ReserveBalance' 
END 

使用上述領域，我需要類似模擬了以下的輸出：

我寧願「0.00」值而不是空格

我想也許我可以有一個ID爲選擇語句，但我甚至不知道我需要做什麼是可能的SQL（雖然我'如果不是，我會感到驚訝）

請幫助！

Answer 1

對於您正在查找的確切格式，我仍然有點不確定，但下面將每個變量的值基於正值或負值，放入兩行中的一行中。爲了清晰起見，我添加了Type列，並假定第一列和最後一列始終顯示在兩行中。

SELECT 'Credit' as [Type], 
    @OpeningBalance as [OpeningBalance], 
    CASE WHEN @ReserveAmount >= 0 THEN @ReserveAmount ELSE 0.00 END as [ReserveAmount], 
    CASE WHEN @ReserveTotal >= 0 THEN @ReserveTotal ELSE 0.00 END as [ReserveTotal], 
    CASE WHEN @ReserveRate >= 0 THEN @ReserveRate ELSE 0.00 END as [ReserveRate], 
    CASE WHEN @RequiredReserve >= 0 THEN @RequiredReserve ELSE 0.00 END as [RequiredReserve], 
    CASE WHEN @ReserveRefund>= 0 THEN @ReserveRefund ELSE 0.00 END as [ReserveRefund], 
    CASE WHEN @UnfinancedInvoices >= 0 THEN @UnfinancedInvoices ELSE 0.00 END as [UnfinancedInvoices], 
    @ReserveBalance as [ReserveBalance] 
UNION ALL 
SELECT 'Debit' as [Type], 
    @OpeningBalance as [OpeningBalance], 
    CASE WHEN @ReserveAmount <= 0 THEN @ReserveAmount ELSE 0.00 END as [ReserveAmount], 
    CASE WHEN @ReserveTotal <= 0 THEN @ReserveTotal ELSE 0.00 END as [ReserveTotal], 
    CASE WHEN @ReserveRate <= 0 THEN @ReserveRate ELSE 0.00 END as [ReserveRate], 
    CASE WHEN @RequiredReserve <= 0 THEN @RequiredReserve ELSE 0.00 END as [RequiredReserve], 
    CASE WHEN @ReserveRefund <= 0 THEN @ReserveRefund ELSE 0.00 END as [ReserveRefund], 
    CASE WHEN @UnfinancedInvoices <= 0 THEN @UnfinancedInvoices ELSE 0.00 END as [UnfinancedInvoices], 
    @ReserveBalance as [ReserveBalance] 

Answer 2

你可以簡單的附加列添加到您的查詢分配你的第一行和第二個行，一個值，另一個，然後你組上：

declare @t table(amt int, cust nvarchar(50)); 
insert into @t values(1,'c1'),(-5,'c1'),(4,'c1'),(7,'c2'),(-9,'c2'); 

select cd 
     ,Customer 
     ,TotalAmount 
from(
    select case when amt < 0 then 'c' else 'd' end as cd 
      ,cust as Customer 
      ,sum(amt) as TotalAmount 
    from @t 
    group by case when amt < 0 then 'c' else 'd' end 
      ,cust 
    ) a 
order by Customer 
     ,cd; 

輸出：

+----+----------+-------------+ 
| cd | Customer | TotalAmount | 
+----+----------+-------------+ 
| c | c1  | -5   | 
| d | c1  | 5   | 
| c | c2  | -9   | 
| d | c2  | 7   | 
+----+----------+-------------+