存储过程困难

Question

我正在使用SQL Server，但遇到了问题。 任何帮助，将不胜感激！

使用AP数据库中创建一个存储过程调用spFindInvoices接受两个参数： @NameVendor类型varchar和@BalanceLimit类型smallmoney 。

此过程将显示VendorName，InvoiceNumber，InvoiceDueDate和@NameVendor的余额，其中余额大于@BalanceLimit。 如果使用@NameVendor = 'Federal Express Corporation'和@BalanceLimit = 0调用/测试该过程，将显示下表：

(my code)
USE AP;
GO

CREATE PROC spInvoices
     @NameVendor VARCHAR(50),
     @BalanceLimit SMALLMONEY
AS
    SELECT 
        VendorName, InvoiceNumber, InvoiceDueDate, 
        (InvoiceTotal - CreditTotal - PaymentTotal) AS Balance
    FROM 
        Invoices 
    JOIN 
        Vendors ON Invoices.VendorID = Vendors.VendorID
    WHERE 
        @NameVendor > @BalanceLimit
GO

EXEC spFindInvoices @NameVendor = 'Federal Express Corporation',
                    @BalanceLimit = '0' 

Answer 1

我不能完全确定我是否了解您的要求，但是如果我是正确的话，我相信您正在为指定的供应商寻找高于指定金额的所有余额

USE AP;
GO

CREATE PROC spInvoices
     @NameVendor VARCHAR(50),
     @BalanceLimit SMALLMONEY
AS
    SELECT 
        VendorName, InvoiceNumber, InvoiceDueDate, 
        (InvoiceTotal - CreditTotal - PaymentTotal) AS Balance
    FROM 
        Invoices 
    JOIN 
        Vendors ON Invoices.VendorID = Vendors.VendorID
    WHERE 
        @BalanceLimit > (InvoiceTotal - CreditTotal - PaymentTotal)
    AND 
        @NameVendor = VendorName
GO

EXEC spFindInvoices @NameVendor = 'Federal Express Corporation',
                @BalanceLimit = '0' 

当您应该将VARCHAR @VendorName和SMALLMONEY @BalanceLimit相互比较时，您应该将它们与查询中的相应值进行比较

Answer 2

此代码应工作：

CREATE PROC spInvoices
     @NameVendor VARCHAR(50),
     @BalanceLimit SMALLMONEY
AS
    SELECT 
        VendorName, InvoiceNumber, InvoiceDueDate, 
        (InvoiceTotal - CreditTotal - PaymentTotal) AS Balance
    FROM 
        Invoices 
    JOIN 
        Vendors ON Invoices.VendorID = Vendors.VendorID
    WHERE 
        @NameVendor  = Vendors.VendorName
        (InvoiceTotal - CreditTotal - PaymentTotal) > @BalanceLimit

但是，也许您需要明确地将您的列： InvoiceTotal ， CreditTotal ， PaymentTotal为smallmoney datattytpe，如果该列的类型不是smallmoney 。