Sql server 2005 使用SUM生成报告

我有两个SQLServer2005表：MainTable和Orders

主表：

| MainID | Serial |
-------------------
| 1      | A00001 |
| 2      | B00002 |

订单：

| OrderID | MainID | Name | Value |
-----------------------------------
| 1       | 2      | John | 100   |
| 2       | 2      | Mike | 200   |
| 3       | 1      | John | 150   |
| 4       | 1      | Mike | 350   |
| 5       | 1      | John | 200   |
| 6       | 2      | John | 500   |
| 7       | 1      | Mike | 50    |

我想得到这样的东西：

|Serial  | Name | Total |
-----------------------
| A00001 | John | 350   |
| A00002 | John | 600   |
| A00001 | Mike | 400   |
| A00002 | Mike | 200   |

---

选择序列号、名称、总数

从主表m中

按MainID、name o从订单o组中选择MainID、name、SUMvalue合计

其中m.MainID=O.MainID

select serial, name, sum(value) as total
from maintable m inner join orders o on
m.mainID = o.mainID
group by
serial, name

SELECT 
    m.serial,
    o.name,
    SUM(o.value)
FROM 
    main m
    INNER JOIN order o ON m.mainid = o.mainid
GROUP BY
    o.name, 
    m.serial

SELECT 
M.SERIAL, O.NAME, SUM(VALUE) AS TOTAL
FROM MAINTABLE M JOIN ORDERS O ON O.MAINID=M.MAINID
GROUP BY M.SERIAL, O.NAME