枢轴的SQL唯一值编号顺序

Question

为了报告目的，我需要透视每个记录上唯一的查询结果。我当前的声明是：

SELECT *
FROM Sales AS x
WHERE (select count(*) from Sales where customer_name=x.customer_name 
        and order_date>=x.order_date)<=5
ORDER BY customer_name, order_date, price;

查询输出的示例是：

customer_name    order_date        price
Company A        2009-02-01        800 
Company A        2009-03-01        100
Company A        2009-04-01        200
Company A        2009-05-01        300
Company A        2009-06-01        500
Company B        2009-02-01        100
Company B        2009-02-01        800
Company B        2009-04-01        200
Company B        2009-05-01        300
Company B        2009-06-01        500

最终，信息需要看起来像这样：

Customer_Name     order_date1  price1    order_date2  price2    order_date3  price3    order_date4  price4    order_date5  price5   
Company A         2009-02-01   800       2009-03-01   100       2009-04-01   200       2009-05-01   300       2009-06-01   500
Company B         2009-02-01   100       2009-02-01   800       2009-04-01   200       2009-05-01   300       2009-06-01   500

我在想我需要为“ pivot_id”添加一列，以便每个分组都有一个共同的记录，因此在数据透视之前的查询结果将如下所示：

pivot_id  customer_name    order_date        price
1         Company A        2009-02-01        800 
2         Company A        2009-03-01        100
3         Company A        2009-04-01        200
4         Company A        2009-05-01        300
5         Company A        2009-06-01        500
1         Company B        2009-02-01        100
2         Company B        2009-02-01        800
3         Company B        2009-04-01        200
4         Company B        2009-05-01        300
5         Company B        2009-06-01        500

哪种SQL语句将为每次购买生成一个自动记录号，而且还会从每个customer_name重新开始？

使用SQL代码生成器在Access 2007中工作。如果解决方案与Access兼容，那就太好了。

抱歉，长度不够。提前致谢。

Answer 1

另一个相关的子查询怎么样？将您的查询保存为Query1（您可能希望ORDER BY从此中间Query中删除该子句-只需对最终结果集进行排序）：

SELECT Q1.customer_name, Q1.order_date, Q1.price, 
       (
        SELECT COUNT(*) + 1
          FROM MyQuery AS Q2
         WHERE Q2.customer_name = Q1.customer_name
               AND Q2.order_date < Q1.order_date
       ) AS pivot_id
  FROM MyQuery AS Q1;