Question

我试图基本输入一年（不是整个日期）来取回一组结果，这些结果将告诉我今年销售的东西数量。不过我不知道怎么做。下面是我的一个例子。

ALTER PROC OrderYear
(@OrderYear datetime)
AS

SELECT Orderdate as [Year],COUNT(SalesOrderID) as Count
FROM Sales.SalesOrderHeader
WHERE @OrderYear=YEAR(OrderDate)
GROUP BY OrderDate

BEGIN
SET NOCOUNT ON
END

EXEC OrderYear '2005'

Answer 1

您希望将查询谓词表示为范围，因为范围是可搜索的：

SELECT Orderdate as [Year],COUNT(SalesOrderID) as Count
FROM Sales.SalesOrderHeader
WHERE OrderDate >= @firstDayOfYear AND OrderDate <= @lastDayOfYear
GROUP BY OrderDate;

所以诀窍就是计算某一年的@firstDayOfYear和@lastDayOfYear。我会将此作为练习留给读者。

Answer 2

程序正常，更改输入参数的类型：

ALTER PROC OrderYear
(@OrderYear int) 
AS
SELECT Orderdate as [Year],COUNT(SalesOrderID) as Count
FROM Sales.SalesOrderHeader
WHERE @OrderYear=YEAR(OrderDate)
GROUP BY OrderDate

存储过程帮助：将年份作为参数传递以获得结果

2 个答案: