SQL - 2列を計算し、別の列に結果を表示

Question

こんにちは私はこの顧客の残高を後で報告するために使用することができます。しかし、2つの列を計算し、結果を別の列に表示する必要があるこの部分ではちょっと固まっています。困難な部分は別の行にあります。だからここにuは私は借方と貸方値を得ることができ、私のクエリで見ることができるように私のクエリ

SELECT ROW_NUMBER() OVER(ORDER BY DR.id)     AS 'NO.' ,   
     CONVERT(VARCHAR(13), CAST(DR.doc_date AS DATE), 100) AS 'DOC DATE', 
     v.which AS 'DOC TYPE', 
     CASE WHEN 
      v.which IN ('NET TOTAL', 'DELL/COL/CHARGE') THEN V.val 
      END AS DEBIT, 
     CASE WHEN 
      v.which IN ('CDW', 'PAYMENT') THEN V.val 
      END AS CREDIT, 
     CAST(v.val AS float) + CAST(v.val AS float) AS 'BALANCE' 

FROM [dbo].[doc_customer] DC 
LEFT JOIN [dbo].[doc_rent] DR ON DR.doc_sourced_customer_id = DC.id 
LEFT JOIN [dbo].[slip_rent] SR ON SR.doc_sourced_doc_rent_id = DR.id 
LEFT JOIN [dbo].[slip_rent_payment] SP ON SP.doc_sourced_rent_id = DR.id OUTER APPLY 
    (VALUES ('NET TOTAL', SR.net_total), 
      ('DELL/COL/CHARGE', SR.dell_col_charge), 
      ('CDW', SR.CDW), 
      ('PAYMENT', sp.amount) 
    ) v(which, val) 
WHERE DC.id = '1-1---1-1-1---1--1~1' 
AND DR.deleted = 0 
AND DR.void = 0 
AND v.val IS NOT NULL 
AND v.val <> '' ; 

だが、私の問題は、その計算の合計を取得する方法について です。

---

マイ所望の出力

| NO. | DOC DATE | DOC TYPE | DEBIT | CREDIT | BALANCE 
------------------------------------------------------------- 
1 | 1 | Mar 28 2017 | NET TOTAL | 341 | NULL | 
2 | 2 | Mar 28 2017 | PAYMENT | NULL | 4000 | -3659 
3 | 3 | Oct 16 2017 | NET TOTAL | 150 | NULL | -3509 
4 | 4 | Oct 16 2017 | CDW  | NULL | 50  | -3559 
5 | 5 | Oct 16 2017 | PAYMENT | NULL | 150 | -3709 

がここに私の所望の出力sql desired output

Answer 1

ためのリンクです、これはSQL Server 2012の以上であれば、あなたはこのようにROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROWをしたい（あなたがインデクサーを必要と気づきます、私は[No.]を選択しました：

SELECT [NO.], Debit, Credit, 
    SUM(coalesce(Debit,0) - coalesce(Credit,0)) OVER(ORDER BY [NO.] 
    ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) 
      AS BALANCE 
FROM 
(
SELECT ROW_NUMBER() OVER(ORDER BY DR.id)     AS 'NO.' ,   
     CONVERT(VARCHAR(13), CAST(DR.doc_date AS DATE), 100) AS 'DOC DATE', 
     v.which AS 'DOC TYPE', 
     CASE WHEN 
      v.which IN ('NET TOTAL', 'DELL/COL/CHARGE') THEN V.val 
      END AS DEBIT, 
     CASE WHEN 
      v.which IN ('CDW', 'PAYMENT') THEN V.val 
      END AS CREDIT, 
     CAST(v.val AS float) + CAST(v.val AS float) AS 'BALANCE' 

FROM [dbo].[doc_customer] DC 
LEFT JOIN [dbo].[doc_rent] DR ON DR.doc_sourced_customer_id = DC.id 
LEFT JOIN [dbo].[slip_rent] SR ON SR.doc_sourced_doc_rent_id = DR.id 
LEFT JOIN [dbo].[slip_rent_payment] SP ON SP.doc_sourced_rent_id = DR.id OUTER APPLY 
    (VALUES ('NET TOTAL', SR.net_total), 
      ('DELL/COL/CHARGE', SR.dell_col_charge), 
      ('CDW', SR.CDW), 
      ('PAYMENT', sp.amount) 
    ) v(which, val) 
WHERE DC.id = '1-1---1-1-1---1--1~1' 
AND DR.deleted = 0 
AND DR.void = 0 
AND v.val IS NOT NULL 
AND v.val <> '' 
) a