postgresql中不同賬戶的開戶和余額查詢

Question

我正在嘗試在 postgresql 查詢中設置開盤和余額列，其中我輸入特定的日期范圍，第一個開盤數據應該是開始日期，並且每個日期行中的余額應該是（開盤數據 + 借記 - 貸記）。

*** 這是我的示例數據庫名稱“opening_and_closure”

date1          acc_no    debit  credit
01/01/2017       a        500       0  
02/01/2017       a          0     400  
03/01/2017       a        100       0  
04/01/2017       a        800       0  
05/01/2017       a          0     700  
06/01/2017       a        800       0  
01/01/2017       b        500       0  
02/01/2017       b          0     400  
03/01/2017       b        100       0  
04/01/2017       b        800       0  
05/01/2017       b          0     700  
06/01/2017       b        800       0  

* 我在 postgresql 中的預期查詢 *日期范圍是 03/01/2017 到 06/01/2017

                                    opening : 100
 date1          acc_no     debit  credit   balance
 03/01/2017       a        100       0        200
 04/01/2017       a        800       0       1000
 05/01/2017       a          0     700        300
 06/01/2017       a        800       0       1100
                                    opening : 100
 date1          acc_no     debit  credit   balance                                        
 03/01/2017       b        100       0        200
 04/01/2017       b        800       0       1000
 05/01/2017       b          0     700        300
 06/01/2017       b        800       0       1100

Answer 1

***在您的數據庫中創建一個表名“opening_and_closure”

create table opening_and_closing (date1 date, acc_no varchar(250), debit numeric,credit numeric);

***在“opening_and_closed”表中插入值

insert  into opening_and_closing
values  ('2017-01-01','a',500,0),
('2017-01-02','a',0,400),
('2017-01-03','a',100,0),
('2017-01-04','a',800,0),
('2017-01-05','a',0,700),
('2017-01-06','a',800,0),
('2017-01-01','b',500,0),
('2017-01-02','b',0,400),
('2017-01-03','b',100,0),
('2017-01-04','b',800,0),
('2017-01-05','b',0,700),
('2017-01-06','b',800,0);

***現在執行以下查詢

select  date1,acc_no,opening,debit,credit,
        (opening+sum(debit-credit) OVER (partition by acc_no order by date1)) as balance
from

    (select date1,acc_no,debit,credit,
    (select sum(debit)-sum(credit) from opening_and_closing where date1 < '2017-01-03'   and  acc_no ='a') as opening

    from opening_and_closing
    where   date1 between '2017-01-03' and '2017-01-06'
    and acc_no ='a'
    group by 1,2,3,4
    order by date1)x