sql-server-2005 - 使用 SUM 生成报告

Question

我有两个 SQL Server 2005 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   |

Answer 1

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