Question

我正在尝试根据下面的Scalar函数编写一个存储过程，以显示每年和每个产品有多少客户？如果产品没有客户然后它应该在结果为零的客户数量，所以它应该显示所有的产品。然后我想将它插入临时表。这是我到目前为止所尝试的但是对于SP中的一些要点，我不知道我要做什么才能得到我的结果。我想它陷入了一个循环:( 有什么想法??

SCALAR：

CREATE FUNCTION NumOfCustomers
(
    @year INT,
    @productId INT,
    @typeOfCustomer NVARCHAR
)
RETURNS TABLE AS 
RETURN
(
SELECT COUNT(DISTINCT Sales.Customer.CustomerID) AS number 

FROM    Sales.SalesOrderDetail SOD 
        INNER JOIN Sales.SalesOrderHeader SOH ON SOD.SalesOrderID = SOH.SalesOrderID
        INNER JOIN Sales.Customer ON Customer.CustomerID = SOH.CustomerID

WHERE
    SOD.ProductID = @productID 
    AND YEAR(SOH.OrderDate) = @year
    AND Sales.Customer.CustomerType = @typeOfCustomer
)
GO

存储过程：

CREATE PROCEDURE MYsp AS 
BEGIN
    DECLARE @year INT, @count INT
    DECLARE yearCursor CURSOR FOR
    SELECT DISTINCT YEAR(SOH.OrderDate) FROM Sales.SalesOrderHeader SOH
    --ORDER BY YEAR DESC
    OPEN yearCursor
    FETCH NEXT FROM  yearCursor INTO @year
    --** Starting the loop in curser and filling the data
    SET @count = 1
    WHILE(@@FETCH_STATUS = 0)
    BEGIN

            DECLARE @prodID INT
            DECLARE @NumOfCustomers INT
            DECLARE prodCursor CURSOR FOR
            SELECT P.ProductID FROM Production.Product P
            OPEN prodCursor
            FETCH NEXT FROM  prodCursor INTO @prodID
            SET @count = 1
            WHILE(@@FETCH_STATUS = 0)
            BEGIN   
                SELECT @NumOfCustomers = NUM.number FROM NumOfCustomers(@year, @prodID, 's') NUM
                INSERT #temp (Year,ProductID,NumOfCustomers) VALUES (@year,@prodID,@NumOfCustomers)

                SET @count = @count+1
                FETCH NEXT FROM prodCursor INTO @prodID
            END
            CLOSE prodCursor
            DEALLOCATE prodCursor

        FETCH NEXT FROM yearCursor INTO @year
    END
    CLOSE yearCursor
    DEALLOCATE yearCursor
END
GO

然后我想执行它并从临时表中获取数据：

EXEC MYsp
SELECT * FROM #temp

Answer 1

在程序中使用select语句：

   CREATE PROCEDURE MYsp AS 
    BEGIN
        DECLARE @year INT, @count INT
        DECLARE yearCursor CURSOR FOR
        SELECT DISTINCT YEAR(SOH.OrderDate) FROM Sales.SalesOrderHeader SOH
        --ORDER BY YEAR DESC
        OPEN yearCursor
        FETCH NEXT FROM  yearCursor INTO @year
        --** Starting the loop in curser and filling the data
        SET @count = 1
        WHILE(@@FETCH_STATUS = 0)
        BEGIN

                DECLARE @prodID INT
                DECLARE @NumOfCustomers INT
                DECLARE prodCursor CURSOR FOR
                SELECT P.ProductID FROM Production.Product P
                OPEN prodCursor
                FETCH NEXT FROM  prodCursor INTO @prodID
                SET @count = 1
                WHILE(@@FETCH_STATUS = 0)
                BEGIN   
                    SELECT @NumOfCustomers = NUM.number FROM NumOfCustomers(@year, @prodID, 's') NUM
                    INSERT #temp (Year,ProductID,NumOfCustomers) VALUES (@year,@prodID,@NumOfCustomers)

                    SET @count = @count+1
                    FETCH NEXT FROM prodCursor INTO @prodID
                END
                CLOSE prodCursor
                DEALLOCATE prodCursor

            FETCH NEXT FROM yearCursor INTO @year
        END
        CLOSE yearCursor
        DEALLOCATE yearCursor
    Select *
     from #temp
    END

GO

现在执行程序：

EXEC MYsp

如何使用存储过程在临时表上存储数据？

1 个答案: