SQL数据相同查询的年增长百分比

Question

如何计算在同一查询中计算的2个不同列的百分比差异？它甚至可能吗？

这就是我现在所拥有的：

SELECT 
      Year(OrderDate) AS [Year], 
      Count(OrderID) AS TotalOrders, 
      Sum(Invoice.TotalPrice) AS TotalRevenue
FROM 
    Invoice 
INNER JOIN Order
        ON Invoice.InvoiceID = Order.InvoiceID
GROUP BY Year(OrderDate);

哪个产生这个表

现在我想再增加一个同比增长的专栏，所以即使2016年到来，增长应该在那里......

编辑： 我应该澄清一下，我希望在

旁边

2015,5,246.28 -> 346,15942029% ((R2015-R2014) / 2014 * 100)

Answer 1

如果将现有查询保存为 qryBase ，则可以将其用作其他查询的数据源，以获得所需内容：

SELECT
    q1.Year,
    q1.TotalOrders,
    q1.TotalRevenue,
    IIf
        (
            q0.TotalRevenue Is Null,
            Null,
            ((q1.TotalRevenue - q0.TotalRevenue) / q0.TotalRevenue) * 100
        ) AS YoY_growth
FROM
    qryBase AS q1
    LEFT JOIN qryBase AS q0
    ON q1.Year = (q0.Year + 1);

访问可能会抱怨它＆＃34;无法在设计视图＆＃34; 中表示连接表达式q1.Year =（q0.Year + 1），但您仍然可以编辑SQL视图中的查询，它将起作用。

Answer 2

您要找的是这样的？

Year    Revenue     Growth
2014    55
2015    246         4.47
2016    350         1.42

您可以将原始查询包装两次以获取两年的数字。

select orders.year, orders.orders, orders.revenue, 
    (select (orders.revenue/subOrders.revenue)
        from 
        (
        --originalQuery or table link
        ) subOrders
        where subOrders.year = (orders.year-1)
    ) as lastYear
from
(
--originalQuery or table link
) orders

这是一个廉价的工会表示例。

select orders.year, orders.orders, orders.revenue, 
    (select (orders.revenue/subOrders.revenue)
        from 
        (
        select 2014 as year, 2 as orders, 55.20 as revenue
        union select 2015 as year, 2 as orders, 246.28 as revenue
        union select 2016 as year, 7 as orders, 350.47 as revenue
        ) subOrders
        where subOrders.year = (orders.year-1)
    ) as lastYear
from
(
select 2014 as year, 2 as orders, 55.20 as revenue
union select 2015 as year, 2 as orders, 246.28 as revenue
union select 2016 as year, 7 as orders, 350.47 as revenue
) orders