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我需要制作一个存储过程,它将供应商名称、开始日期和结束日期作为参数,并计算给定时间间隔内该供应商的总收入。我正在使用罗斯文。该过程如下所示:
CREATE PROC usp_GetTotalIncomeByPeriod (
@companyName nvarchar(40),
@startDate date,
@endDate date)
AS
BEGIN
SELECT SUM(od.UnitPrice * od.Quantity * (1 - od.Discount))
FROM Orders o
JOIN [Order Details] od
ON o.OrderId = od.OrderId
JOIN Products p
ON od.ProductID = p.ProductID
JOIN Suppliers s
ON p.SupplierID = s.SupplierID
WHERE s.CompanyName = @companyName
AND (o.OrderDate BETWEEN @startDate AND @endDate);
END
GO
问题是我无法使用以下调用实际执行它:
EXEC dbo.usp_GetTotalIncomeByPeriod @companyName = 'Exotic Liquids',
@startDate = DATEFROMPARTS(1900, 01, 01),
@endDate = DATEFROMPARTS(2000, 1, 1);
DATEFROMPARTS 函数本身似乎运行良好,但我无法设法使其作为参数运行。它不断给我“1900 年附近的语法错误”。我想念什么?