SQL SELECT 每组前 1 名
SQL SELECT TOP 1 FOR EACH GROUP
我浏览了其他问题,但无法完全找到我要查找的内容 我有一个 SQL 数据库,其中有一个名为 InventoryAllocations 的 table。在 table 中,我有多个 DocumentID 条目,并且想要检索每个唯一 DocumentID 的最后一个条目。我可以通过
取回一个
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
但我希望它能带回一个包含所有唯一 DocumentID 的列表's.I 希望您能提供帮助。非常感谢汉娜 x
这给每条记录一行,获取每个文档 ID,然后给最新的 created_date 一个 row_number 1,并且在那之前的每一行递增 1。然后我们 select rowno 为 1 的记录以获取每个文档 ID 的最新创建日期:
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
基本上是这样。
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
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
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);
TOP 1
在此处与 WITH TIES
一起使用。
WITH TIES
表示当 ORDER BY = 1
时,SELECT
获取此记录(因为 TOP 1
)和所有其他具有 ORDER BY = 1
的记录(因为WITH TIES
).
我浏览了其他问题,但无法完全找到我要查找的内容 我有一个 SQL 数据库,其中有一个名为 InventoryAllocations 的 table。在 table 中,我有多个 DocumentID 条目,并且想要检索每个唯一 DocumentID 的最后一个条目。我可以通过
取回一个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
但我希望它能带回一个包含所有唯一 DocumentID 的列表's.I 希望您能提供帮助。非常感谢汉娜 x
这给每条记录一行,获取每个文档 ID,然后给最新的 created_date 一个 row_number 1,并且在那之前的每一行递增 1。然后我们 select rowno 为 1 的记录以获取每个文档 ID 的最新创建日期:
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
基本上是这样。
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
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
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);
TOP 1
在此处与 WITH TIES
一起使用。
WITH TIES
表示当 ORDER BY = 1
时,SELECT
获取此记录(因为 TOP 1
)和所有其他具有 ORDER BY = 1
的记录(因为WITH TIES
).