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我正在构建一些基本的 sql 查询，并且在“group By”子句中遇到问题。我在列标题上使用了别名，但在尝试“分组”我的结果时遇到了问题。我目前的代码是：-

SELECT                 
  vwREP_GP_ContractProjectPurchaseCostCatID.PACOSTCATID AS COST_CAT_CODE, 
  vwREP_GP_ContractProjectPurchaseCostCatID.PACOSTCATNME AS COST_CAT_NAME, 
  vwREP_GP_ContractProjectPurchaseRpt.COST, 
  vwREP_GP_ContractProjectPurchaseRpt.ITEMDESC AS ITEM, 
  vwREP_GP_ContractProjectPurchaseRpt.CREDITOR, 
  vwREP_GP_ContractProjectPurchaseRpt.DOC_NUM AS DOCUMENT_NUMBER, 
  vwREP_GP_ContractProjectPurchaseRpt.DESCRIPTION, 
  vwREP_GP_ContractProjectPurchaseRpt.DOC_DATE AS DATE,  
  vwREP_GP_ContractProjectPurchaseRpt.PROJECT AS JOB_CODE_STAGE, 
  vwREP_GP_ContractProjectPurchaseRpt.COMPOUNDNAME AS CATEGORY_DESCRIPTION
FROM         
  vwREP_GP_ContractProjectPurchaseCostCatID 
INNER JOIN
  vwREP_GP_ContractProjectPurchaseRpt ON  wREP_GP_ContractProjectPurchaseCostCatID.PACOSTCATID = vwREP_GP_ContractProjectPurchaseRpt.PACOSTCATID


SELECT CATEGORY_DESCRIPTION, SUM(COST) AS TotalCost FROM 
    ( 
        SELECT COMPOUNDNAME AS CATEGORY_DESCRIPTION FROM wREP_GP_ContractProjectPurchaseRpt
    ) A 
GROUP BY CATEGORY_DESCRIPTION

添加了额外的代码来处理使用别名列名后，我现在收到一个错误，即“COST”是无效列？我没有更改此列名？？

我知道它明显在盯着我看，但我的大脑没有参与，所以如果有人能指出我哪里出错了，或者更简单的方法，那将是一个很大的帮助。

提前致谢。

（这一切都在 sql server management studio 2005 上完成）

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2 回答 2

1

采用

SELECT COMPOUNDNAME AS CATEGORY_DESCRIPTION, 
       Sum(COST) AS TotalCost 
FROM   vwREP_GP_ContractProjectPurchaseRpt 
GROUP  BY COMPOUNDNAME

代替

SELECT  CATEGORY_DESCRIPTION,SUM(COST)AS TotalCost FROM 
( 
    SELECT COMPOUNDNAME AS CATEGORY_DESCRIPTION FROM vwREP_GP_ContractProjectPurchaseRpt
) A 
GROUP BY CATEGORY_DESCRIPTION

您没有在内部查询中包含 COST 列。

于 2012-05-18T10:54:42.987 回答
1 
SELECT  CATEGORY_DESCRIPTION, SUM(COST) AS TotalCost
FROM    ( 
        SELECT COMPOUNDNAME AS CATEGORY_DESCRIPTION, COST
        FROM   vwREP_GP_ContractProjectPurchaseRpt
        ) A 
GROUP BY
        CATEGORY_DESCRIPTION
于 2012-05-18T10:54:54.033 回答