How To Undo A Delete With Cascades
Aug 30, 2005
Hello,
Somebody accidently deleted a record with cascade deletes
and took out about 80 records.
The database has been used heavily since then.
How do I put back the data?
I have spent hours researching BOL and all I can find
is how to restore the database to a point in time.
But that will lose all the work done after the mistake.
(We do a full backup every week and log backup every day)
Is there a standard way to do this?
Morgan
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Apr 13, 2007
I am not sure if this is necessarily a simple question, but I'm somewhat new to SQL so I thought maybe there's an obvious answer I just don't know about.
The problem is that I have one "master" table, and a child table that has two foreign key references back to that master table. Both of these foreign key constraints are marked as "on delete cascade" with the intention that should a row from the master table be deleted, any rows that reference that object in EITHER foreign key field should be deleted.
I am wondering why this causes a cycle. It seems logical enough to me, it just involves two passes of the table, one for each affected column.
Thanks,
Logan
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Sep 15, 1998
I accidentaly deleted data from the wrong table. Is there a way to un-delete what I had deleted.
need help ASAP.
Regards,
Steve
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Jan 27, 2004
I may have misinterpreted the error I just got...but.. is it impossible in SQL Server to have a cascade delete FK constraint that leads to a table which has another cascade delete FK?? What's a workaround? Triggers?
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Nov 21, 2004
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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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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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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Apr 20, 2006
Is there anyway in SQL Server to rollback an SQL statement which wasalready executed. I know there is a transaction log but what itcontains and how it works is still a mystery to me.Assuming I delete all records from a table - can I somehow undo this?
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Dec 17, 1999
if we kill sp, let's say, on the third statement, will the first two
be rolled back (undo) ?
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Apr 9, 2008
How come Undo button does not work? Thanks.
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Jan 17, 2014
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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Apr 2, 2008
I often run queries in Query analyzer. Today I accidentaly deleted some data from a table. Is their a way to undo the last SQL command executed?I have heard of the rollback command, but I don't know if that is applicable or not?
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Nov 28, 2007
I have full Recovery mode.
I just accidently deleted a handful of records out of a table about 10 minutes ago. My last backup was last night.
Can I go back 10 minutes ago for a specific table? If so how... DO I need to backup now, then use the trans-logs to recover up to a specific point?
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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May 29, 2008
currently i m developing a web application with using sql server 2005
and i was testing yesterday a sql update query with sql server management studio.
in my update query i forgot to put where condition and now all the rows of table are updated. is there any solution to undo this and retrieve all rows back?
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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Dec 18, 2014
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.
a. I tried GRANT DELETE... - no luck
b. Then I saw an article explaining to use REVOKE, so I tried 'REVOKE DELETE' followed by 'GRANT DELETE' - still no luck.
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Aug 7, 2015
I have a table with 1 million records. I want to update only 400 records. The update statement is provided by a 3rd party vendor. Once i run the update statement it will update all the 400 records. Once the table is updated the users will validate the table
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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Sep 11, 2015
I have some simple files but they are failing because the delete history task is failing as it is looking for files in a non existent directory.
It is looking for files in C:Program FilesMicrosoft SQL ServerMSSQL10_50.INSTANCEMSSQLLog whereas it should be looking in C:Program FilesMicrosoft SQL ServerMSSQL10_50.MSSQLSERVERMSSQLLog
how I can get this corrected so I can get the Maintenance Plans to run correctly.
I have tried deleting and recreating the Plan but to no avail
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May 19, 2012
I am using Master Data Service for couple of months now. I can load, update, merge and soft delete data in MDS. Occasionally we even have to hard delete data from MDS. If we keep on soft deleting records in a MDS table eventually there will be huge number of soft deleted records. Is there an easy way to hard delete all the soft deleted records from all MDS tables in a specific Model.
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Oct 23, 2004
Hello:
Need some serious help with this one...
Background:
Am working on completing an ORM that can not only handles CRUD actions -- but that can also updates the structure of a table transparently when the class defs change. Reason for this is that I can't get the SQL scripts that would work for updating a software on SqlServer to be portable to other DBMS systems. Doing it by code, rather than SQL batch has a chance of making cross-platform, updateable, software...
Anyway, because it needs to be cross-DBMS capable, the constraints are that the system used must work for the lowest common denominator....ie, a 'recipe' of steps that will work on all DBMS's.
The Problem:
There might be simpler ways to do this with SqlServer (all ears :-) - just in case I can't make it cross platform right now) but, with simplistic DBMS's (SqlLite, etc) there is no way to ALTER table once formed: one has to COPY the Table to a new TMP name, adding a Column in the process, then delete the original, then rename the TMP to the original name.
This appears possible in SqlServer too --...as long as there are no CASCADE operations.
Truncate table doesn't seem to be the solution, nor drop, as they all seem to trigger a Cascade delete in the Foreign Table.
So -- please correct me if I am wrong here -- it appears that the operations would be
along the lines of:
a) Remove the Foreign Key references
b) Copy the table structure, and make a new temp table, adding the column
c) Copy the data over
d) Add the FK relations, that used to be in the first table, to the new table
e) Delete the original
f) Done?
The questions are:
a) How does one alter a table to REMOVE the Foreign Key References part, if it has no 'name'.
b) Anyone know of a good clean way to get, and save these constraints to reapply them to the new table. Hopefully with some cross platform ADO.NET solution? GetSchema etc appears to me to be very dbms dependant?
c) ANY and all tips on things I might run into later that I have not mentioned, are also greatly appreciated.
Thanks!
Sky
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Nov 13, 2006
I am having great difficulty with cascading deletes, delete triggers and referential integrity.
The database is in First Normal Form.
I have some tables that are child tables with two foreign keyes to two different parent tables, for example:
Table A
/
Table B Table C
/
Table D
So if I try to turn on cascading deletes for A/B, A/C, B/D and C/D relationships, I get an error that I cannot have cascading delete because it would create multiple cascade paths. I do understand why this is happening. If I delete a row in Table A, I want it to delete child rows in Table B and table C, and then child rows in table D as well. But if I delete a row in Table C, I want it to delete child rows in Table D, and if I delete a row in Table B, I want it to also delete child rows in Table D.
SQL sees this as cyclical, because if I delete a row in table A, both table B and table C would try to delete their child rows in table D.
Ok, so I thought, no biggie, I'll just use delete triggers. So I created delete triggers that will delete child rows in table B and table C when deleting a row in table A. Then I created triggers in both Table B and Table C that would delete child rows in Table D.
When I try to delete a row in table A, B or C, I get the error "Delete Statement Conflicted with COLUMN REFERENCE". This does not make sense to me, can anyone explain? I have a trigger in place that should be deleting the child rows before it attempts to delete the parent row...isn't that the whole point of delete triggers?????
This is an example of my delete trigger:
CREATE TRIGGER [DeleteA] ON A
FOR DELETE
AS
Delete from B where MeetingID = ID;
Delete from C where MeetingID = ID;
And then Table B and C both have delete triggers to delete child rows in table D. But it never gets to that point, none of the triggers execute because the above error happens first.
So if I then go into the relationships, and deselect the option for "Enforce relationship for INSERTs and UPDATEs" these triggers all work just fine. Only problem is that now I have no referential integrity and I can simply create unrestrained child rows that do not reference actual foreign keys in the parent table.
So the question is, how do I maintain referential integrity and also have the database delete child rows, keeping in mind that the cascading deletes will not work because of the multiple cascade paths (which are certainly required).
Hope this makes sense...
Thanks,
Josh
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Nov 17, 2006
I'm trying to clean up a database design and I'm in a situation to where two tables need a FK but since it didn't exist before there are orphaned records.
Tables are:
Brokers and it's PK is BID
The 2nd table is Broker_Rates which also has a BID table.
I'm trying to figure out a t-sql statement that will parse through all the recrods in the Broker_Rates table and delete the record if there isn't a match for the BID record in the brokers table.
I know this isn't correct syntax but should hopefully clear up what I'm asking
DELETE FROM Broker_Rates
WHERE (Broker_Rates.BID <> Broker.BID)
Thanks
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Nov 26, 2007
this is my Delete Query NO 1
alter table ZT_Master disable trigger All
Delete ZT_Master WHERE TDateTime> = DATEADD(month,DATEDIFF(month,0,getdate())-(select Keepmonths from ZT_KeepMonths where id =1),0) AND TDateTime< DATEADD(month,DATEDIFF(month,0,getdate()),0)
alter table ZT_Master enable trigger All
I have troble in Delete Query No 2
here is a select statemnt , I need to delete them
select d.* from ZT_Master m, ZT_Detail d where (m.Prikey=d.MasterKey) And m.TDateTime> = DATEADD(month,DATEDIFF(month,0,getdate())-(select Keepmonths from ZT_KeepMonths where id =1),0) AND m.TDateTime< DATEADD(month,DATEDIFF(month,0,getdate()),0)
I tried modified it as below
delete d.* from ZT_Master m, ZT_Detail d where (m.Prikey=d.MasterKey) And m.TDateTime> = DATEADD(month,DATEDIFF(month,0,getdate())-(select Keepmonths from ZT_KeepMonths where id =1),0) AND m.TDateTime< DATEADD(month,DATEDIFF(month,0,getdate()),0)
but this doesn't works..
can you please help?
and can I combine these 2 SQL Query into one Sql Query? thank you
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Feb 16, 2008
I'm using SqlDataSource and an Access database. Let's say I got two tables:user: userID, usernamemessage: userID, messagetextLet's say a user can register on my website, and leave several messages there. I have an admin page where I can select a user and delete all of his messages just by clicking one button.What would be the best (and easiest) way to make this?Here's my suggestion:I have made a "delete query" (with userID as parameter) in MS Access. It deletes all messages of a user when I type in the userID and click ok.Would it be possible to do this on my ASP.net page? If yes, what would the script look like?(yes, it is a newbie question)
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Sep 16, 2013
The requirement is: I should allow single row delete from a table but not bulk delete. An audit table should get updated if there is any single delete or single update. So I wrote the triggers as follows: for single and bulk delete
ALTER TRIGGER [dbo].[TRG_Delete_Bulk_tbl_attendance]
ON [dbo].[tbl_attendance]
AFTER DELETE
AS
[code]...
When I try to run the website, the database error I am getting is:Transaction count after EXECUTE indicates that a COMMIT or ROLLBACK TRANSACTION statement is missing. Previous count = 0, current count = 1.
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Aug 20, 2007
I ran the following query in Query Analyzer on a machine running SQL Server 2000. I'm attempting to delete from a linked server running SQL Server 2005:
DELETE FROM sql2005.production.dbo.products
WHERE vendor='Foo'
AND productId NOT IN
(
SELECT productId FROM sql2000.staging.dbo.fooProductList
)
The status message (and @@ROWCOUNT) told me 8 rows were affected, but nothing was actually deleted; when I ran a SELECT with the same criteria as the DELETE, all 8 rows are still there. So, once more I tried the DELETE command. This time it told me 7 rows were affected; when I ran the SELECT again, 5 of the rows were still there. Finally, after running this exact same DELETE query 5 times, I was able to remove all 8 rows. Each time it would tell me that a different number of rows had been deleted, and in no case was that number accurate.
I've never seen anything like this before. Neither of the tables involved were undergoing any other changes. There's no replication going on, or anything else that should introduce any delays. And I run queries like this all day, involving every thinkable combination of 2000 and 2005 servers, that don't give me any trouble.
Does anyone have suggestions on what might cause this sort of behavior?
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Nov 20, 2007
Hi,
I have a problem with one report on my server. A user has requested that I exclude him from receiving a timed email subscription to several reports. I was able to amend all the subscriptions except one. When I try to remove his email address from the subscription I receive this error:
An internal error occurred on the report server. See the error log for more details. (rsInternalError) Get Online Help
For more information about this error navigate to the report server on the local server machine, or enable remote errors
Online no help couldn't offer any advice at all, so I thought I'd just delete the subscription and recreate it again, but I receive the same message. "Okay, no problem, I'll just delete the report and redeploy it and set up the subscription so all the other users aren't affected", says I. "Oh, no!", says the report server, and then it give me this message:
System.Web.Services.Protocols.SoapException: Server was unable to process request. ---> System.Data.SqlClient.SqlException: Only members of sysadmin role are allowed to update or delete jobs owned by a different login. at System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) at System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) at System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) at System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString) at System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async) at System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, DbAsyncResult result) at System.Data.SqlClient.SqlCommand.InternalExecuteNonQuery(DbAsyncResult result, String methodName, Boolean sendToPipe) at System.Data.SqlClient.SqlCommand.ExecuteNonQuery() at Microsoft.ReportingServices.Library.InstrumentedSqlCommand.ExecuteNonQuery() at Microsoft.ReportingServices.Library.DBInterface.DeleteObject(String objectName) at Microsoft.ReportingServices.Library.RSService._DeleteItem(String item) at Microsoft.ReportingServices.Library.RSService.ExecuteBatch(Guid batchId) at Microsoft.ReportingServices.WebServer.ReportingService2005.ExecuteBatch() --- End of inner exception stack trace ---
What's even weirder is that I'm the owner and creator of the report and I'm a system admin and content manager on the report server and I set up the subscription when the report was initially deployed. Surely I should have sufficient rights to fart around with this subscription/report as I see fit?
I have rebooted the server, redeployed the report, checked credentials on the data source and tried amending and deleting from both the report manager and management studio but still I am prevented from doing so.
Any help would be much appreciated.
Thanks in advance,
Paul
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