計算餘額Oracle

Question

我遇到了問題。我只想計算我桌子的平衡。

我的select語句是：

select date, ammount, ?? as Balance 
from table 
where accountnr = 123 
order by date 

輸出應該是這樣的：

Date    Ammount   Balance 
 
07/02/2016  -145.55   945.65 
25/01/2016  349.45   1091.20 
11/11/2015  340.25   741.75 
30/09/2015  369.10   401.50   
05/04/2015  32.40   32.40 

我試過這麼長時間，有沒有運氣不同的方式。

Answer 1

你可以做一個單一的表掃描（即沒有任何連接或相關子查詢）與分析查詢：

SELECT "date", 
     amount, 
     SUM(amount) OVER (ORDER BY "date") AS balance 
FROM your_table; 

如果有，則表中的多個帳戶：

SELECT account_number, 
     "date", 
     amount, 
     SUM(amount) OVER (PARTITION BY account_number ORDER BY "date") AS balance 
FROM your_table;