MS Access通过PIVOT TRANSFORM旋转查询

Question

我在MS Access 2013中开发了一个数据库。 我需要从两个表中生成一个报告：inventory_type，inventory（以及一些T-SQL的经验）

库存表：

id
inv_type(FK of inventory_type.id)
inv_name, etc.

inventory_type表：

id
type_name

我使用GROUP BY进行简单查询：

SELECT it.type_name AS [Inventory name], Count(i.ID) AS Quantity
FROM inventory_type AS it INNER JOIN inventory AS i ON it.ID = i.inv_type
GROUP BY it.type_name;

此查询的结果是：

Inventory Name | Quantity
VideoCamera         3
PC                  5
.....

但结果应该是这样的：

Quantity | VideoCamera | PC
Quantity |     3          5

我试图这样做：

TRANSFORM Count(it.ID) AS Quantity
SELECT "Quantity"
FROM inventory_type AS it INNER JOIN inventory AS i ON it.ID = i.inv_type
GROUP BY it.type_name
PIVOT it.type_name;

但结果并不是我的预期：

Quantity | VideoCamera  |  PC
Quantity        3              
Quantity                    5

有人可以帮我解决这个问题，无法理解ms访问语义。

Answer 1

只需从type_name子句中删除GROUP BY：

TRANSFORM Count(it.ID) AS CountOfQuantity 
SELECT 'Quantity' AS Quantity
FROM inventory_type AS it INNER JOIN inventory AS i ON it.ID = i.inv_type 
GROUP BY 'Quantity' 
PIVOT it.type_name;