SQL Server 透视和计数函数错误答案

【问题标题】：SQL Server Pivot and Count Function ErrorSQL Server 透视和计数函数错误
【发布时间】：2013-10-09 01:39:18
【问题描述】：

我正在使用公用表表达式和 PIVOT 函数来获取过去 5 年销售的产品数量，但出现错误。为什么会出现以下错误？

USE ADVENTUREWOKS2012;

WITH SALESDATA AS
(
    SELECT
        Product.PRODUCTID,
        Product.Name,
        YEAR(OrderDate) AS [YEAR SOLD]
    FROM Purchasing.PurchaseOrderDetail
    JOIN Production.Product
       ON Product.ProductID = PurchaseOrderDetail.ProductID
    JOIN Purchasing.PurchaseOrderHeader
       ON PurchaseOrderDetail.PurchaseOrderID = PurchaseOrderHeader.PurchaseOrderID
    GROUP BY Product.PRODUCTID,Product.Name,YEAR(OrderDate)
)
SELECT Name,
   [2005],
   [2006],
   [2007],
   [2008],
   [2009],
   PRODUCTID
FROM SALESDATA
PIVOT (COUNT(PRODUCTID) FOR [YEAR SOLD] IN ([2005], [2006], [2007], [2008], [2009])) AS P;

错误：

消息 207，第 16 级，状态 1，第 21 行列名“PRODUCTID”无效。

【问题讨论】：

标签： sql-server pivot common-table-expression

【解决方案1】：

您正在使用 PIVOT 中的 ProductId 列 -- count(productId) 因此您无法在最终选择列表中引用该列。如果您想引用它，请将您的查询更改为包含该列两次，以便您可以将其保留在最终选择中：

WITH SALESDATA AS
(
    SELECT
        pivProd = Product.PRODUCTID,
        Product.PRODUCTID,
        Product.Name,
        YEAR(OrderDate) AS [YEAR SOLD]
    FROM Purchasing.PurchaseOrderDetail
    JOIN Production.Product
       ON Product.ProductID = PurchaseOrderDetail.ProductID
    JOIN Purchasing.PurchaseOrderHeader
       ON PurchaseOrderDetail.PurchaseOrderID = PurchaseOrderHeader.PurchaseOrderID
    GROUP BY Product.PRODUCTID,Product.Name,YEAR(OrderDate)
)
SELECT Name,
   [2005],
   [2006],
   [2007],
   [2008],
   [2009],
   PRODUCTID
FROM SALESDATA
PIVOT 
(
  COUNT(pivProd) FOR [YEAR SOLD] IN ([2005], [2006], [2007], [2008], [2009])
) AS P;

或者只是从最终选择中删除它：

WITH SALESDATA AS
(
    SELECT
        Product.PRODUCTID,
        Product.Name,
        YEAR(OrderDate) AS [YEAR SOLD]
    FROM Purchasing.PurchaseOrderDetail
    JOIN Production.Product
       ON Product.ProductID = PurchaseOrderDetail.ProductID
    JOIN Purchasing.PurchaseOrderHeader
       ON PurchaseOrderDetail.PurchaseOrderID = PurchaseOrderHeader.PurchaseOrderID
    GROUP BY Product.PRODUCTID,Product.Name,YEAR(OrderDate)
)
SELECT Name,
   [2005],
   [2006],
   [2007],
   [2008],
   [2009]
FROM SALESDATA
PIVOT 
(
  COUNT(PRODUCTID) FOR [YEAR SOLD] IN ([2005], [2006], [2007], [2008], [2009])
) AS P;

【讨论】：