sql - 选择具有 MAX(Date) 但没有得到明显回报的记录

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

然而，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，我得到了重复的值，以帮助金发女郎>

Answer 1

尝试这个：

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;

这应该为您提供每个供应商最新购买的股票代码及其价格。

Answer 2

我相信这种形式的查询更容易理解并且可以很容易地维护：

;WITH ABC AS (
  SELECT 
    GRND.StockCode,
    GRND.Supplier,
    OrigReceiptDate,
    Price = (GRND.OrigGrnValue / GRND.QtyReceived),
  FROM [SysproCompanyR].[dbo].[GrnDetails] GRND
  WHERE QtyReceived > 0
),
P AS (
  SELECT 
    ABC1.StockCode,
    lastOne.Supplier,
    lastOne.Price,
    ReceiptDate = lastOne.OrigReceiptDate
  FROM 
    (SELECT DISTINCT StockCode FROM ABC) ABC1
    CROSS APPLY(
      SELECT TOP 1
        Supplier,
        Price,
        OrigReceiptDate
      FROM ABC
      WHERE StockCode = ABC1.StockCode
      ORDER BY OrigReceiptDate DESC
    ) lastOne
)
SELECT *
FROM P
WHERE 
  StockCode IN (
    SELECT StockCode
    FROM [SysproCompanyR].[dbo].[InvMaster])
ORDER BY 
  StockCode,
  Price

Answer 3

我认为你可以这样做：

SELECT a.*
FROM( SELECT  StockCode,
              Supplier,
              OrigGrnValue/QtyReceived) AS Price,
              OrigReceiptDate AS ReceiptDate
      ROW_NUMBER() OVER (PARTITION BY StockCode, Supplier, OrigGrnValue/QtyReceived ORDER BY OrigReceiptDate DESC) as rown
      FROM GrnDetails
      WHERE QtyReceived > 0 ) a
WHERE a.rown = 1
AND a.StockCode EXISTS (SELECT StockCode
                        FROM [SysproCompanyR].[dbo].[InvMaster] m
                        WHERE m.StockCode = a.StockCode)
ORDER BY a.StockCode,
         a.Price

Answer 4

在 WHERE 子句中使用运算符 EXISTS 和相关子查询的另一种选择

SELECT P.*
FROM (
      SELECT GRND.StockCode, GRND.Supplier, GRND.OrigReceiptDate, (GRND.OrigGrnValue / GRND.QtyReceived) AS Price
      FROM [SysproCompanyR].[dbo].[GrnDetails] AS GRND
      WHERE QtyReceived > 0      
      ) P
WHERE P.StockCode IN (
                      SELECT StockCode
                      FROM [SysproCompanyR].[dbo].[InvMaster]
                      )
  AND EXISTS(
             SELECT 1
             FROM [SysproCompanyR].[dbo].[GrnDetails] AS GRND2
             WHERE GRND.StockCode = GRND2.StockCode
               AND GRND.Supplier = GRND2.Supplier
             HAVING MAX(GRND2.OrigReceiptDate) = GRND.OrigReceiptDate
             )
ORDER BY P.StockCode, P.Price