sql - 选择具有 MAX(Date) 的记录但没有获得不同的返回

Question

我正在加入表格，我的代码如下所示:

SELECT P.*
FROM (
  SELECT ABC.StockCode
    ,ABC.Supplier
    ,ABC.Price
    ,MAX(ABC.OrigReceiptDate) ReceiptDate
  FROM (
    SELECT GRND.StockCode
      ,GRND.Supplier
      ,OrigReceiptDate
      ,(GRND.OrigGrnValue / GRND.QtyReceived) AS Price
    FROM [SysproCompanyR].[dbo].[GrnDetails] GRND
    WHERE QtyReceived > 0
    ) ABC
  GROUP BY ABC.StockCode
    ,ABC.Supplier
    ,ABC.Price
  ) P
WHERE P.StockCode IN (
    SELECT StockCode
    FROM [SysproCompanyR].[dbo].[InvMaster]
    )
ORDER BY P.StockCode
  ,P.Price

但是结果集是:

我的问题是我需要获取最新购买的股票代码及其价格...但由于价格不同，我得到了重复值以帮助金发女郎>

Answer 1

试试这个:

WITH CTE
AS
(
    SELECT 
      ABC.StockCode, 
      ABC.Supplier, 
      ABC.Price,
      ABC.OrigReceiptDate AS ReceiptDate, 
      ROW_NUMBER() OVER(PARTITION BY ABC.Supplier
                        ORDER BY ABC.OrigReceiptDate DESC) AS RN 
    FROM
    (
       SELECT GRND.StockCode, GRND.Supplier,OrigReceiptDate, 
         (GRND.OrigGrnValue /GRND.QtyReceived) as Price
       FROM [SysproCompanyR].[dbo].[GrnDetails] GRND
       Where QtyReceived > 0
    ) AS ABC 
    INNER JOIN [SysproCompanyR].[dbo].[InvMaster] AS m 
            ON ABC.StockCode = m.StockCode
)
SELECT 
  StockCode, 
  Supplier, 
  Price,
  ReceiptDate
FROM CTE 
WHERE RN = 1;

这应该会为您提供每个供应商最新购买的股票代码及其价格。