分组摘要数据

Question

试图在这里做一些事情来创建一种摘要数据.我不确定它是最优雅的sql代码!

我有下表

Product             Channel         Sold
-------------------     ----------------------  
PC                  Web             48
Laptop              Web             2
Speakers            Web             74
DVDs                Web             33
PC                  Shop            1
Laptop              Shop            1
Speakers            Shop            1
DVDs                Shop            5
PC                  Door-to-door    7
Laptop              Door-to-door    16
Speakers            Door-to-door    9
DVDs                Door-to-door    21
PC                  Referals        7
Laptop              Referals        16
Speakers            Referals        9
DVDs                Referals        21

我想查询数据,以便我得到一些代表"直接"销售的东西,这是一个网络和商店销售的总和,因此忽略了挨家挨户和忏悔.

Product             Channel         Sold
-------------------     ----------------------  
PC              Direct          49
Laptop          Direct          3
Speakers        Direct          75
DVDs            Direct          38

有谁知道我怎么做这个？我正在考虑分组(选择......分组),但我正在尝试的一切都是绝望的失败!大声笑.

提前致谢.

DS

编辑!

如果我想把挨家挨户和忏悔放在一起作为"次要"怎么办？这很容易实现吗？所以我在寻找......

Product             Channel         Sold
-------------------     ----------------------  
PC              Direct          49
Laptop          Direct          3
Speakers        Direct          75
DVDs            Direct          38
PC              Secondary       14
Laptop          Secondary       32
Speakers        Secondary       18
DVDs            Secondary       42

再次感谢!

DS

Answer 1

您只需要过滤掉记录channel并使用SUM()on column 聚合它们,Sold特别是每个组product.

SELECT  Product,    
        'Direct' Channel,
        SUM(Sold) TOtalSold
FROM    TableName
WHERE   Channel IN ('Web','Shop')
GROUP   BY Product

• SQLFiddle演示

UPDATE

SELECT  Product,    
        CASE    WHEN Channel IN ('Web','Shop') 
                THEN 'Direct'
                ELSE 'Secondary'
        END Channel,
        SUM(Sold) TOtalSold
FROM    TableName
GROUP   BY Product,
        CASE    WHEN Channel IN ('Web','Shop') 
                THEN 'Direct'
                ELSE 'Secondary'
        END 
ORDER   BY Channel

• SQLFiddle演示

OUTPUT

????????????????????????????????????
? PRODUCT  ?  CHANNEL  ? TOTALSOLD ?
????????????????????????????????????
? Laptop   ? Direct    ?         3 ?
? Speakers ? Direct    ?        75 ?
? DVDs     ? Direct    ?        38 ?
? PC       ? Direct    ?        49 ?
? Laptop   ? Secondary ?        32 ?
? Speakers ? Secondary ?        18 ?
? DVDs     ? Secondary ?        42 ?
? PC       ? Secondary ?        14 ?
????????????????????????????????????