未使用变量的MYSQL视图

Question

我想将此查询转换为视图。我需要消除变量的使用。 SQL代码是这样的：

SET @runningTotal = 0; 
SELECT 
    feescollected.DatePaid, feescollected.TermPaidFor,                                
    feescollected.FeesPaid, 
@runningTotal := @runningTotal + feescollected.FeesPaid AS runningTotal 
FROM feescollected; 

预期输出：

DatePaid TermPaidFor  FeesPaid runningTotal 
----------------------------------------------------  
2014-02-06 I    150000  150000 
2014-03-24 I    70000  220000 
2014-04-08 I    80000  300000 

Answer 1

喜欢这个？

SELECT 
    feescollected.DatePaid, feescollected.TermPaidFor,                                
    feescollected.FeesPaid, 
(feescollected.FeesPaid + 0) AS runningTotal 
FROM feescollected; 

Answer 2

使用子查询基于日期

SELECT 
    a.DatePaid, 
    a.TermPaidFor,                                
    a.FeesPaid, 
(select sum(b.FeesPaid) from feescollected b where a.DatePaid >= b.DatePaid) AS runningTotal 
FROM feescollected a 

DEMO