小编HRS*_*SO1的帖子

有 3 个表：客户、发票和付款。带有发票和付款表的客户链接。问题是，需要检索报表明智的借方、贷方和余额。主要问题是未从日期范围获得期初余额。我提供带有查询的示例数据。

客户表：

（插入新客户时，如果他们有未分配余额与期初余额，否则保留空白（空））

CREATE TABLE BASE_Customer
(
    CustomerId INT IDENTITY(1,1),
    CustomerName VARCHAR(45),
    SalesOpeningBalance MONEY NULL,
    PRIMARY KEY(CustomerId)
)

INSERT INTO BASE_Customer (CustomerName, SalesOpeningBalance) VAlUES ('Ricky', 2500) -- with opening balance.
INSERT INTO BASE_Customer (CustomerName) VAlUES ('Smith') -- without opening balance.

发票表：

CREATE TABLE BASE_Invoice
(
    InvoiceId INT IDENTITY(1,1),
    InvoiceDate DATE,
    CustomerId INT,
    Total MONEY,
    PRIMARY KEY(InvoiceId)
)

INSERT INTO BASE_Invoice (InvoiceDate, CustomerId, Total) VALUES ('2022-01-01', 1, 500) -- Ricky 
INSERT INTO BASE_Invoice (InvoiceDate, CustomerId, Total) VALUES ('2022-01-02', 2, …