SQL Server 开窗函数Over的使用(计算结存金额)
假设我们有一组数据,包含四列(币种,交易日期,收入金额,支出金额)
Select * From
(Values
('CNY','2022-01-01',100,50),
('CNY','2022-01-02',200,50),
('CNY','2022-01-03',300,100),
('CNY','2022-01-04',400,50),
('CNY','2022-01-05',500,60),
('CNY','2022-01-06',1000,500),
('CNY','2022-01-07',600,300),
('CNY','2022-01-08',800,400),
('CNY','2022-01-09'