With Standby UNDO

Feb 9, 2007

I'm confused how the undo works when you restore WITH STANDBY

Suppose I restore WITH STANDBY

FULL
DIFF
LOG A
LOG B
LOG C

How do I undo LOG C? Do I restore LOG B again?

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Newbie Query - Replicate To Hot Standby And How To Enable The Hot Standby For Access

Nov 14, 2007



I've been reading a million and one posts on replication

My scenario is that i have a live SQL 2000 server. In a DR invokation, i'e i've lost my live sever, i want to be able to access the same data at the DR (SQL 2000) site and have it accessable to the users. DR server has a different name to the live box.

Replicate

Master
CRMDatabase

Data changes all the time but can have hourly replication of transaction logs for this example. I've currently researched a sp called update logons but this has to be fed each account name to enable them on the new server. There must be a way to activate all CRMDatabase logons with the new server?

Could someone be kind enough to lead me through a step by step guide on the best solution.


Thanks a lot

David

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Nov 19, 2007



Hi,

The standby file (.tuf file) got deleted accidentally on the secondary. How can I recover the database without the standby file?

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Hello all,

I know that Oracle uses undo table spaces or rollback segments as its undo mechanism. what does Microsoft SQL Server use as its undo mechanism?

Krz

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Dec 9, 2007

Hello !

I have a big problem. I need to go back un changes that had been since the a specific date (beginning of november in my case).

Thanks a lot for any help on how to do this !

Regards,
Fabianus

my favorit hoster is ASPnix : www.aspnix.com !

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I have update a table field and I like to know how do you "undo" the update? I set the field_length from 6 to 7 and like to undo this.Here is my command:

table = template_fileds
column= field_length.
filed name= field_name.
update template_fields set field_length='7' where field_name='assesscode9'

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Dec 2, 2005

Muhammad Qasim writes "i hav query that i was just taking the backup of the database n by mistake i just clicked restore as the wizards are similar so i just restored the database to 10days old backup n now i have no latest backup so how can i just undo this restore if u hav any idea of how to overcome this plz reply as early possible lookin for replies"

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May 20, 2007

hai to every one,

i am pavan working as oracle dba. in oracle we have undo table space.
when we issue rollback oracle gets old image from undo tablespace.

in sql server where it gets from old image.

who performs instance crash recovery(which back ground is responsible for it)

in sql server we have logwriter, lazy writers(back ground processes)
what are the other processess.

and some doubts are

how insert query works
how update query works,
how select query works.

means i issue update statement. command successfully executed. late issue rollback, from where sql server gets old imege of the data

please send me any archetecture book /pdf/online link

thanks
kumar

pavan
Associate Oracle DBA

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Nov 29, 2007



Hi
Can somebody advice me on this:

I am trying to update a row, which is being pulled from another table.

i.e., I have two tables T1 and T2

I am getting a row from T2 and inserting it in T1
then I am updating that row in T1

What i want is if in case these is an error while updating this row I want to remove the row from T1
T1 and T2 are same.

declare @err1 int

--BEGIN TRANSACTION

INSERT INTO dbo.T1 SELECT * FROM dbo.T2 WHERE UpdateFlag = 'Y' AND ID = '12345'

BEGIN TRY

UPDATE dbo.T1 set ReportDate= '9910-12-2006'

SET @Err1 = @@error

END TRY

BEGIN CATCH

insert into errorlog values (error_message())

END CATCH



--if @err1<>0

--begin

--Rollback transaction

--end


This work fine but I am not able to roll back the transaction

When I activate the codes fro roll back, it not performing the Logging operation in CATCH also terminating

REQUIREMENT

1) Get the record in T1 from T2
2) Update the record in T1
3) IF step:3 good commit it, else remove the only the row which was pulled from T2. It must do this also log in dbo.ErrorLog the errored system message error_message()

Thanks a lot in advance









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Oct 11, 2006

Hi ,

I was working in the SSIS designer and when I found that the DataFlow task I deleted was indeed something I needed, I tried to Undo the operation but Alas the option is not enabled :(

Is there a way we can undo the operations?

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Nov 28, 2007

I have full Recovery mode.

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Thanks!!

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Oct 21, 2015

USE [master]
RESTORE DATABASE [EmployeeRecovered] FROM  DISK = N'D:BackupsNormalEmployeeFULL.BAK' WITH  FILE = 1,  
MOVE N'Employee' TO N'D:MSSQLDATAEmployeeRecovered1.mdf',  
MOVE N'Employee_log' TO N'D:MSSQLLOGEmployeeRecovered1_log.ldf',  
NOUNLOAD,  STATS = 5, NORECOVERY

[Code] ....

Now I realze the recovery point is somewhere in TranBackup2.trn and need to go back to the state where only TranBackup1.trn is applied. How can i do this ?

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currently i m developing a web application with using sql server 2005
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Regards Selena

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Sep 17, 2007



Hi,

I am in a process of designing a web application (ASP.NET) which is mostly data driven. The application needs to provide an undo functionality to users for eg. Undo an Add, Update or Delete that has been already committed to the database.

We are using SQL Server 2005 at back end. What I need to know is how will I enable this feature at database level. I am sure we might have to play with triggers but that too might not help in achieving the UNDO functionality. If anyone can shed light on how to achieve this, it will be quite helpful. Thanks

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1. A few months ago, I received a request to deny delete to a group (Windows AD login) against 3 databases. So I issued a DENY DELETE to the relevant Windows login.

2. Now, someone is having trouble updating data. The issue seems to be that a trigger fires during the update. In the trigger the code tries to delete from a table in the previously delete-denied databases. So the update fails.

-- In retrospect, perhaps I should have used REVOKE - not sure

-- Also, I can't seem to find a listing of the DENY permissions - or rather, how to list what permissions are denied. I guess maybe that is a hard thing to do if the result of a DENY is to leave certain permission columns NULL (vs adding 'DENY'). But it would be useful for me to see what the current permission state is.

-- Finally, I tried to undo the DENY without success. Here is my attempt.

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if the update is successful or not. What i'm looking for is:

1) Is there a way to identify what records were updated.
2) If the update done is not what the users wanted i need to undo and bring back the 400 records to their previous values.

I'm on sql server 2008.

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Jun 18, 2015

I received an alert from one of my two secondary servers (all servers are running 2012 SP1):

File 'E:SQLMS SQL ServerMSSQL11.MSSQLSERVERMSSQLDATAMyDatabaseName_DateTime.tuf' is not a valid undo file for database 'MyDatabaseName (database ID 8). Verify the file path, and specify the correct file.

The detail in the job step shows this additional information:

*** Error: Could not apply log backup file 'MyDatabaseName_DateTime.trn' to secondary database 'MyDatabaseName'.(Microsoft.SqlServer.Management.LogShipping) ***

*** Error: Table error: Page (0:0). Test (m_headerVersion == HEADER_7_0) failed. Values are 0 and 1.

Table error: Page (0:0). Test ((m_type >= DATA_PAGE && m_type <= UNDOFILE_HEADER_PAGE) || (m_type == UNKNOWN_PAGE && level == BASIC_HEADER)) failed. Values are 0 and 0.

Table error: Page (0:0). Test (m_freeData >= PageHeaderOverhead () && m_freeData <= (UINT)PAGESIZE - m_slotCnt * sizeof (Slot)) failed. Values are 0 and 8192.
Starting a few minutes later, the Agent Job named LSRestore_MyServerName_MyDatabaseName fails every time it runs. The generated log backup, copy, and restore jobs run every 15 minutes.

I fixed the immediate problem by running a copy-only full backup on the primary, deleting the database on the secondary and restoring the new backup on the secondary with NORECOVERY. The restore job now succeeds and all seems fine. The secondaries only exists for DR purposes - no one runs reports against them or uses them at all. I had a similar problem last weekend on a different database that is also replicated between the same servers. I've been here for over a year, and these are the first instances of this problem that I've seen. However, I've now seen it twice in a week on the same server.

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Hi

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Thanks

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