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SQL Server : new and old value from history table in one row


SQL Server : new and old value from history table in one row

By : Cheang Kwong Yew
Date : November 20 2020, 01:01 AM
Hope that helps have a history table some thing like , In SQL Server 2012+, you can use the lag() function:
code :
select h.*, lag(vendor) over (partition by user order by createdtime) as prev_vendor
from history h;
select h.*, hprev.vendor as prev_vendor
from history h outer apply
     (select top 1 h2.*
      from history h2
      where h2.vendor = h.vendor
      order by createdtime
     ) hprev;


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Table history trigger in SQL Server?

Table history trigger in SQL Server?


By : john
Date : March 29 2020, 07:55 AM
I hope this helps . If each user has an account, you can use the SYSTEM_USER function to determine the current user. However, if all your connections go through a proxy account, as is typical in most web site setups, then you have to rely on the proper userId being passed to the Update statement:
code :
CREATE TRIGGER [update_history] ON MyTable
FOR UPDATE
AS
INSERT MyTable_History (id, BudgetNumber, PositionNumber, ModifiedDate, action, userId)
SELECT id, BudgetNumber, PositionNumber, GETDATE(), 'BEFORE UPDATE', inserted.userId
FROM MyTable
    Join inserted
        On inserted.id = MyTable.id

INSERT MyTable_History (id, BudgetNumber, PositionNumber, ModifiedDate, action, userId)
SELECT id, BudgetNumber, PositionNumber, GETDATE(), 'AFTER UPDATE', userId
FROM inserted
Migrating SQL Server point history table to period history table

Migrating SQL Server point history table to period history table


By : user2337057
Date : March 29 2020, 07:55 AM
help you fix your problem I am trying to clean up a not so useful history table by changing it's format. For the usage of the history table it is relevant between which time a row was valid. , Maybe I'm missing something, but this seems to work:
code :
CREATE TABLE #webhist(
    Unit int,
    Value int,
    HistoryOn datetime
)

INSERT INTO #webhist VALUES
(1, 123, '2013-01-05 14:16:00'), 
(1, 234, '2013-01-07 12:12:00'),
(2, 325, '2013-01-04 14:12:00'),
(1, 657, '2013-02-04 17:11:00'),
(3, 132, '2013-04-02 13:00:00')

SELECT
    u1.Unit
    ,u1.Value
    ,u1.HistoryOn AS HistoryStart
    ,u2.HistoryOn AS HistoryEnd
FROM #webhist u1
OUTER APPLY (
    SELECT TOP 1 *
    FROM #webhist u2
    WHERE u1.Unit = u2.Unit AND u1.HistoryOn < u2.HistoryOn
    ORDER BY HistoryOn
) u2

DROP TABLE #webhist
SQL Server - update table history

SQL Server - update table history


By : Daniel
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Consider the following data sample from #myTempTwo , Here is an example with trigger and history table:
code :
CREATE TABLE OriginaTable(ID INT IDENTITY, Price MONEY)
GO

CREATE TABLE HistoryTable(ID INT IDENTITY, OriginalID INT, Price MONEY, CreatedDate DATETIME)
GO

CREATE TRIGGER trOriginaTable ON OriginaTable
FOR UPDATE
AS
BEGIN
  IF UPDATE(Price)
  BEGIN
        INSERT INTO dbo.HistoryTable
                ( OriginalID, Price, CreatedDate )
                SELECT ID, Price, GETDATE() FROM Deleted
  END
END
GO

INSERT INTO OriginaTable VALUES(NULL)
GO

UPDATE dbo.OriginaTable SET Price = 100 WHERE ID = 1
UPDATE dbo.OriginaTable SET Price = 10 WHERE ID = 1
UPDATE dbo.OriginaTable SET Price = 200 WHERE ID = 1

SELECT * FROM dbo.HistoryTable
ID  OriginalID  Price   CreatedDate
1   1           NULL    2015-11-05 18:46:49.823
2   1           100.00  2015-11-05 18:46:49.830
3   1           10.00   2015-11-05 18:46:49.833
What is a job history server in Hadoop and why is it mandatory to start the history server before starting Pig in Map Re

What is a job history server in Hadoop and why is it mandatory to start the history server before starting Pig in Map Re


By : Оюунзаяа Очирхуяг
Date : March 29 2020, 07:55 AM
I hope this helps you . JobTracker or ResourceManager keeps all job information in memory. For finished jobs, it drops them to avoid running out of memory. Tracking of these past jobs are delegated to JobHistory server.
Pig clients pulls job counter stats when its jobs are finished. Stats could still be with JobTracker/ResourceManager or pig may need to ask the JobHistory server. When JobHistory server is down, it prints out those log messages but eventually client should still succeed with missing stats.
How to keep history of changes in a very simple table in SQL Server?

How to keep history of changes in a very simple table in SQL Server?


By : Sathya Nallasamy
Date : March 29 2020, 07:55 AM
I wish this helpful for you I created something similar to this..
If I remember correctly I created a table and named it Update_History
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