SQL 服务器查询以获取每行的总数

Question

我有两个 tables InvoiceLine 和 Discount:

我需要得到一个结果集，其中包括发票订单项以及折扣 table 中的折扣总额 (SUM)，如下所示：

如何仅使用一个查询来实现这一目标？

Answer 1

SELECT
A.InvoiceHeaderID, A.InvoiceLineNo, ProductCode, Price, SUM(DiscountValue) as TotDiscount
FROM
InvoiceLine A, Discount B
WHERE
A.InvoiceHeaderID = B.InvoiceHeaderID
AND A.InvoiceLineNo = B.InvoiceLineNo
GROUP BY
A.InvoiceHeaderID, A.InvoiceLineNo, ProductCode, Price
Order BY
A.InvoiceHeaderID, A.InvoiceLineNo

Answer 2

select
    i.InvoiceHeaderId,
    i.InvoiceLineNo,
    i.ProductCode,
    i.Price,
    [TotDiscount]=isnull(d.TotDiscount)
from
    [InvoiceLine] i
left join
    [Discount] d on i.InvoiceHeaderId=d.InvoiceHeaderId and i.InvoiceLineNo=d.InvoiceLineNo
group by
    i.InvoiceHeaderId,
    i.InvoiceLineNo,
    i.ProductCode,
    i.Price

Answer 3

DECLARE @InvoiceLine TABLE
    (
      InvoiceHeaderID INT ,
      InvoiceLineNo INT ,
      ProductCode VARCHAR(5) ,
      Price MONEY
    );

INSERT  INTO @InvoiceLine
VALUES  ( 1, 1, 'AB001', 1200 ),
        ( 2, 1, 'AC002', 1525 );


DECLARE @Discount TABLE
    (
      InvoiceHeaderID INT ,
      InvoiceLineNo INT ,
      DiscountCategory VARCHAR(10) ,
      discountValue MONEY
    );
INSERT  INTO @Discount
VALUES  ( 1, 1, 'SalesDisc', 120 ),
        ( 1, 1, 'FixedOffer', 100 ),
        ( 2, 1, 'SalesDisc', 152.50 );


SELECT  l.InvoiceHeaderID ,
        l.InvoiceLineNo ,
        l.ProductCode ,
        l.Price ,
        ISNULL(SUM(d.discountValue),0) [TotalDiscount]
FROM    @InvoiceLine l
        LEFT JOIN @Discount d ON d.InvoiceHeaderID = l.InvoiceHeaderID
                                 AND d.InvoiceLineNo = l.InvoiceLineNo
GROUP BY l.InvoiceHeaderID ,
        l.InvoiceLineNo ,
        l.ProductCode ,
        l.Price;

结果

Answer 4

SELECT
InvoiceLine .InvoiceHeaderID, InvoiceLine .InvoiceLineNo, ProductCode, Price, SUM(DiscountValue) as TotDiscount
FROM
InvoiceLine, Discount 
WHERE
InvoiceLine .InvoiceHeaderID = Discount .InvoiceHeaderID AND A.InvoiceLineNo = Discount .InvoiceLineNo
GROUP BY InvoiceLine .InvoiceHeaderID, InvoiceLine .InvoiceLineNo, ProductCode, Price
Order BY InvoiceLine .InvoiceHeaderID, InvoiceLine .InvoiceLineNo

SQL 服务器查询以获取每行的总数

SQL Server query to get the total for each row

sql

tsql

sql-server

ssms-2014