SQL - 带有 SUM 和返回的过程和查询

Question

我正在尝试使用执行 SUM 的子查询来执行 Procedure。 该程序应列出<ProductFinished>的所有项目（即Pizza等）并列出配料，配料单价和成品成本总和。

数据库的UML：

The product <NameFInishedProduct> is composed of 
        3 <NameRawProduct> priced <BuyPrice> € each
        1 <NameRawProduct> priced <BuyPrice> € each
The total price of the <NameFInishedProduct> is <SUM> €.

正常输出的女巫应该是这样的

The product Pizza is composed of
        3 Tomato priced 2 € each
        1 Cheese priced 1€ each
The total price of the Pizza is 7 €.

Answer 1

这应该可行：

SELECT textLine FROM
(
    SELECT  pf.NameFinishedProduct As Name, 
            1 as Typ, 
            N'The product '+pf.NameFInishedProduct+N' is composed of' As textLine
    FROM    ProductFinished As pf
 UNION ALL
    SELECT  pf.NameFinishedProduct, 
            2, 
            N'        '+CAST(co.QuantityUsed As NVARCHAR(80))+N' '+pr.NameRawProduct+N' priced '+CAST(pr.BuyPrice As NVARCHAR(80))+N' € each'
    FROM    ProductFinished As pf
    JOIN    Composition     As co ON co.IdProductFinished = pf.IdProductFinished
    JOIN    ProductRaw      As pr ON pr.IdProductRaw      = pr.IdProductRaw
 UNION ALL
    SELECT  pf.NameFinishedProduct, 
            3, 
            N'The total price of the '+pf.NameFInishedProduct+N' is '+CAST(SUM(co.QuantityUsed * pr.BuyPrice) AS NVARCHAR(80))+N' €.'
    FROM    ProductFinished As pf
    JOIN    Composition     As co ON co.IdProductFinished = pf.IdProductFinished
    JOIN    ProductRaw      As pr ON pr.IdProductRaw      = pr.IdProductRaw
    GROUP BY pf.NameFinishedProduct
) AS A
ORDER BY Name, Typ

当然，我没有什么可以测试它的，所以请谨慎购买。