计算每一笔交易开放BAL后余额

Question

我有两个SQL数据库中的表即

Cust_Table(CustID, CustName, custAddrs, CustMob, CustOpBal) 

而且

Trans_Table(TransId, CustID, TransAmt, TransType(bool dr/cr), Msg, TansDate) 

现在我需要的SQL查询的越来越声明等（银行存折）特别是 客户ID？

Date  Message Dt_Amount Cr_Amount Balance 

荫使用下面的查询

SELECT t1.Trans_Date, t1.Trans_Msg, 
(CASE WHEN t1.Trans_Type=1 THEN 'Cr' ELSE 'Dr' END) as Trans_Type, 
t1.Trans_Amount, 
SUM(t2.Trans_Amount*case when t2.trans_type = '1' then 1 else -1 end) as Balance 
FROM [LNLCredit].[dbo].[Trans_Table] t1 
INNER JOIN [LNLCredit].[dbo].[Trans_Table] t2 
ON t1.cust_id = t2.cust_id AND t1.trans_id >= t2.Trans_ID 
WHERE t1.Cust_ID=2 
GROUP BY t1.cust_id,t1.trans_id,t1.trans_type,t1.Trans_Amount,t1.Trans_Date,t1.Trans_Msg; 

其工作的罚款。

但我也想添加Opening Balance（从Cust_Table）到上面的解决方案。

请帮忙??????

Answer 1

试试这个..

SELECT t1.Trans_Date, t1.Trans_Msg, 
(CASE WHEN t1.Trans_Type=1 THEN 'Cr' ELSE 'Dr' END) as Trans_Type, 
t1.Trans_Amount, 
SUM(t2.Trans_Amount*case when t2.trans_type = '1' then 1 else -1 end) as Balance, 
c.CustOpBal 
FROM [LNLCredit].[dbo].[Trans_Table] t1 
INNER JOIN [LNLCredit].[dbo].[Trans_Table] t2 
     ON t1.cust_id = t2.cust_id AND t1.trans_id >= t2.Trans_ID 
INNER JOIN Cust_Table C on C.cust_id = t1.cust_id 
WHERE t1.Cust_ID=2 
GROUP BY t1.cust_id,t1.trans_id,t1.trans_type,t1.Trans_Amount, 
     t1.Trans_Date,t1.Trans_Msg,C.CustOpBal; 

你需要列中添加额外的INNER JOIN并添加openingBalance到GROUP BY和SELECT