为了计数或不计数，这就是问题所在

Question

我有这张桌子：

Strawberries 2
Strawberries 3
Strawberries 4
Chocolate 3
Chocolate 4
Chocolate 5
Chocolate 6
Apples 3
Apples 4
Apples 5
Apples 6

我的想法是获得物品的数量，以及每件物品的总数，如下：

Item         Number        Total
Strawberries 2             9
Strawberries 3             9
Strawberries 4             9
Chocolate    3             18
Chocolate    4             18
Chocolate    5             18
Chocolate    6             18
Apples       3             18
Apples       4             18
Apples       5             18
Apples       6             18

所以我在做：

SELECT     TOP (100) PERCENT item, number, COUNT(number) AS total FROM products
GROUP BY item, number
ORDER BY item

但我得到的数字都错了：

Item         Number        Total
Strawberries 2             6
Strawberries 3             21
Strawberries 4             17
Chocolate    3             1
Chocolate    4             8
Chocolate    5             34
Chocolate    6             1
Apples       3             1
Apples       4             10
Apples       5             32
Apples       6             1

我究竟做错了什么？

Answer 1

SELECT  item, number, SUM(number) OVER (PARTITION BY item)
FROM    products
ORDER BY
        item, number