Question

我已经查看了其他问题，并且无法找到我正在寻找的东西，我有一个SQL数据库，并在其中有一个名为InventoryAllocations的表。在表格中，我有多个DocumentID条目，并希望检索每个唯一DocumentID的最后一个条目。我可以通过执行

来检索一个

SELECT  top(1) [UID]
      ,[RecordStatusID]
      ,[CreatedDate]
      ,[CreatedTime]
      ,[CreatedByID]
      ,[OperationType]
      ,[InventoryLocationID]
      ,[DocumentTypeID]
      ,[DocumentID]
      ,[SOJPersonnelID]
      ,[InventorySerialisedItemID]
      ,[TransactionQty]
      ,[TransactionInventoryStatusID]
      ,[Completed]
      ,[CreatedByType]
      ,[RecordTimeStamp]
  FROM [CPData].[dbo].[InventoryAllocations]
  order by DocumentID desc

但是我想让它带回一个包含所有唯一DocumentID的列表。我希望你能提供帮助。非常感谢Hannah x

Answer 1

SELECT TOP 1 WITH TIES 
    [UID]
    ,[RecordStatusID]
    ,[CreatedDate]
    ,[CreatedTime]
    ,[CreatedByID]
    ,[OperationType]
    ,[InventoryLocationID]
    ,[DocumentTypeID]
    ,[DocumentID]
    ,[SOJPersonnelID]
    ,[InventorySerialisedItemID]
    ,[TransactionQty]
    ,[TransactionInventoryStatusID]
    ,[Completed]
    ,[CreatedByType]
    ,[RecordTimeStamp]
FROM 
    [CPData].[dbo].[InventoryAllocations]
ORDER BY
    ROW_NUMBER() OVER(PARTITION BY DocumentID ORDER BY [RecordTimeStamp] DESC);

Answer 2

You can use a RowNumber() Window Function.

SELECT * FROM(
    SELECT 
            ROW_NUMBER() OVER(PARITION BY [DOCUMENTID] ORDER BY [RecordTimeStamp] DESC) AS RowNumber, 
          ,[RecordStatusID]
          ,[CreatedDate]
          ,[CreatedTime]
          ,[CreatedByID]
          ,[OperationType]
          ,[InventoryLocationID]
          ,[DocumentTypeID]
          ,[DocumentID]
          ,[SOJPersonnelID]
          ,[InventorySerialisedItemID]
          ,[TransactionQty]
          ,[TransactionInventoryStatusID]
          ,[Completed]
          ,[CreatedByType]
          ,[RecordTimeStamp]
      FROM [CPData].[dbo].[InventoryAllocations] ) as A 
WHERE RowNumber = 1

Answer 3

这给每个记录一行，取每个文档ID，然后给最新的created_date一个row_number为1，每行前面的增量为1.然后我们选择rowno为1的记录来获取最新创建的记录每个文件ID的日期：

SELECT [UID]
,[RecordStatusID]
,[CreatedDate]
,[CreatedTime]
,[CreatedByID]
,[OperationType]
,[InventoryLocationID]
,[DocumentTypeID]
,[DocumentID]
,[SOJPersonnelID]
,[InventorySerialisedItemID]
,[TransactionQty]
,[TransactionInventoryStatusID]
,[Completed]
,[CreatedByType]
,[RecordTimeStamp]
FROM
(
SELECT  
[UID]
,[RecordStatusID]
,[CreatedDate]
,[CreatedTime]
,[CreatedByID]
,[OperationType]
,[InventoryLocationID]
,[DocumentTypeID]
,[DocumentID]
,[SOJPersonnelID]
,[InventorySerialisedItemID]
,[TransactionQty]
,[TransactionInventoryStatusID]
,[Completed]
,[CreatedByType]
,[RecordTimeStamp]
,ROW_NUMBER() OVER (PARTITION BY DOCUMENT_ID ORDER BY CreatedDate) DESC AS ROWNO
FROM [CPData].[dbo].[InventoryAllocations] 
)
WHERE ROWNO = 1

Answer 4

基本上就是这样。

with cte as
(
    SELECT [UID]
        , [RecordStatusID]
        , [CreatedDate]
        , [CreatedTime]
        , [CreatedByID]
        , [OperationType]
        , [InventoryLocationID]
        , [DocumentTypeID]
        , [DocumentID]
        , [SOJPersonnelID]
        , [InventorySerialisedItemID]
        , [TransactionQty]
        , [TransactionInventoryStatusID]
        , [Completed]
        , [CreatedByType]
        , [RecordTimeStamp]
        , ROW_NUMBER() over (partition by DocumentID order by DocumentID desc) as RowNum
    FROM   [CPData].[dbo].[InventoryAllocations]
)

select [UID]
    , [RecordStatusID]
    , [CreatedDate]
    , [CreatedTime]
    , [CreatedByID]
    , [OperationType]
    , [InventoryLocationID]
    , [DocumentTypeID]
    , [DocumentID]
    , [SOJPersonnelID]
    , [InventorySerialisedItemID]
    , [TransactionQty]
    , [TransactionInventoryStatusID]
    , [Completed]
    , [CreatedByType]
    , [RecordTimeStamp]
from cte
where RowNum = 1
order by DocumentID desc

每个组的SQL SELECT TOP 1

4 个答案: