過濾

Question

我有這樣的SQL在SQL Server：

SELECT 
    Itens.Mercadoria, Mercadoria.Nome, Cabecalho.Data, 
    SUM(ValorUnitario) AS Total, 
    SUM(Quantidade) AS Quantidade 
FROM 
    Itens 
INNER JOIN 
    Mercadoria ON Itens.Mercadoria = Mercadoria.Codigo 
INNER JOIN 
    Cabecalho ON Cabecalho.Codigo = Itens.Cabecalho 
WHERE 
    Cabecalho.Data >= '2016-01-01' 
    AND Cabecalho.Data <= '2018-12-31' 
GROUP BY 
    Itens.Mercadoria, Mercadoria.Nome, Cabecalho.Data 
ORDER BY 
    4 DESC 

它返回以下結果。

高亮顯示的值重複，我不想重複，我想只顯示一次，每個項目的Quantidade和Total字段SUM。

例如：

`Camisa Polo` -> **Quantidade = 23** 
`Calça Jeans` -> **Quantidade = 15** 
`Camiseta Estampada` -> **Quantidade = 21** 

Answer 1

假設thate銷售和SaleItems之間的關係是基於SalesId 可以分配之間使用your_start_date和your_end_date適當值

select Products.ProductName 
     , sum(SaleItems.Price) 
     , sum(SaleItems.Quantity) 
    from Products 
    inner join SaleItems on SaleItems.IdProduct = Products.IdProduct 
    inner join Sales on Sales.IdSale = SaleItems.IdSale 
    where SaleDate between your_start_date and your_end_date 
    group by Products.ProductName 

在你的情況下刪除或彙總Cabecalho.Data列，例如：

SELECT Itens.Mercadoria 
     , Mercadoria.Nome 
     , SUM(ValorUnitario) AS Total 
     , SUM(Quantidade) AS Quantidade 
    FROM Itens INNER JOIN Mercadoria ON Itens.Mercadoria = Mercadoria.Codigo 
    INNER JOIN Cabecalho ON Cabecalho.Codigo = Itens.Cabecalho 
    WHERE Cabecalho.Data between '2016-01-01' AND '2018-12-31' 
    GROUP BY Itens.Mercadoria, Mercadoria.Nome 
    ORDER BY 4 DESC 

或

SELECT Itens.Mercadoria 
     , Mercadoria.Nome 
     , max(Cabecalho.Data) 
     , SUM(ValorUnitario) AS Total 
     , SUM(Quantidade) AS Quantidade 
    FROM Itens INNER JOIN Mercadoria ON Itens.Mercadoria = Mercadoria.Codigo 
    INNER JOIN Cabecalho ON Cabecalho.Codigo = Itens.Cabecalho 
    WHERE Cabecalho.Data between '2016-01-01' AND '2018-12-31' 
    GROUP BY Itens.Mercadoria, Mercadoria.Nome 
    ORDER BY 4 DESC