DB Engine :: Secure Deletion Of Data
Nov 16, 2015
We have been asked whether it is possible to completely delete sensitive data. When data is deleted it is not actually completely removed from the database but is marked as deleted. It is possible to zero out that data using sp_clean_db_free_space but this doesn't affect the transaction log.
We had hoped that CHECKPOINT would clear the data from the log but we are not completely certain of this. So the question becomes is there a built-in command or function in SQL Server 2008, or subsequent versions, that will completely remove deleted data, both from the transaction log and the database itself? Or is there a 3rd party tool to accomplish the same thing?
View 25 Replies
ADVERTISEMENT
Sep 17, 2015
SQL Server 2008 R2: How security log is much secure than application log?
View 3 Replies
View Related
Jul 23, 2005
We have an employee table that contains bank details and are experiencingproblems with account numbers being erased and lost. In order to track downwhy this is happening (either due to our application code or SQLreplication) we'd like to be able to prevent certain columns from beingdeleted if they already contain some data.Is it possible to setup a check constraint to prevent our ee_acct_no columnsfrom being set to NULL or blank strings if it contains an account number(i.e a 9 digit number)? We have setup the column to allow NULL's as we don'talways know employees bank details until later, so we do need to put them onour database without bank details initially.Also, if possible, can someone suggest a stored procedure or trigger i couldcreate that would fire a user-defined error message that would email anoperator if a bank account number changed?Many thanksDan Williams.
View 8 Replies
View Related
Nov 5, 2007
SET identity_insert dbo.table1 on
GO
insert into dbo.table1(
PrimaryKeyCol,Col1, Col2 .....)
select
PrimaryKeyCol,Col1, Col2......
from [Sever].Database.dbo.table1 as ClientColumn
where not exists(
select * from dbo.table1 as ServerColumn
where ServerColumn.PrimaryKeyCol = ClientColumn.PrimaryKeyCol
)
DELETE FROM [Server].Database.dbo.table1
where exists(
where ServerColumn.PrimaryKeyCol = ClientColumn.PrimaryKeyCol
)
SET identity_insert dbo.table1 off
GO
I can't complie this code.. anybody see where I went wrong??
Thanks for all your help.
View 10 Replies
View Related
May 23, 2006
Anil Chauhan writes "Hello experts,
I have a table in sql server 2000 which has over 94000 records.
I have to delete a record from table ,which record having a language other than english .
I need to clean the table by removing all the data which are in other language .
My main table has 12 fields .
Thanks in advance."
View 1 Replies
View Related
Jan 18, 2008
Hello,
I have not been able to locate information on the following problem. The first step I have in a packge (Execute SQL Command) is to delete the data from an MS Access database table. The package hangs at this step after all validation is complete. In the package, once the table data is deleted, it is repopulated in a later step. The deletion step and the repopulation step use the same connection manager.
There is no information in the log about an error. At the time the package ran, there was a lock file on the database with about six users connected. I'm not sure what version of Access the database was created in, but I have 2003 on my machine, and I cannot open the database.
Any ideas?
Thank you for your help!
cdun2
View 9 Replies
View Related
Jan 30, 2007
Hi Experts:
We have several database linked via merge replications. Due to business requirements, we need to delete 5M rows in one table, we did it on one subscriber. However, the publisher kept uploading the deletion operations from the subscriber and blocked any downloading operation from publisher to subscriber. How can we acceralte the replications now as this has already operated in 2 days, and will continue 1-2 days? Is it possible to set the publisher take the downloading before uploading? How to speed up large amount data deletion operations in replication environment?
Thanks in advance!
Ron
View 4 Replies
View Related
Jul 23, 2005
Dear netters,We are looking to build a SQL Server database that will be hooked up toa Web server (WebLogic or a .NET).The database will house data for multiple customers, and therequirement is to have no customer see other customer data. Web serverwill be responsible for authenticating users (ids and passwords will bemaintained there/possibly stored in the database, but will not beactual database logins) -- and establishing pooled connections to thedatabase, using some sort of a proxy login.Ideally, we do not want to have the database itself visible to "theworld", it should reside behind a firewall, and be accessible throughthe Web server, which will do all authentication and routing.We want to have either tables or views defined in such a way that:1. Users can only see their own data and NEVER can see anybody else's.2. Users' access to the database is logged (this includes updates aswell as queries).3. We would like to provide some sort of a reporting mechanism -- whereusers can form their own queries. So, something like a Crystal or anAccess front end, that users are typically familiar with... The problemis that this requires users having direct access to the database (?),and opens up tables (unless, there is a way to create parameterizedviews that will always restrict access to a subset of records).Any advice on how to best implement this is greatly appreciated.Thank you in advance!
View 4 Replies
View Related
Aug 17, 2006
I have read recommendations about searching encrypted data. Typically, they involve creating a MAC (message authentication code) table. One of the elements of that table is a HASH of the encrypted data (plus a Mac key) that is used as an index for searching. Is that HASH as secure as the encrypted data itself, or is this approach less secure? If it is less secure, then may I assume that approach is the only feasible way to search data encrypted by nondeterministic algorithms?
TIA,
Barkingdog
View 5 Replies
View Related
Oct 6, 2015
We are running 2014 enterprise. Have there been any features added to sql server that ease the challenge of restoring only data? I often find myself creating separate databases so that a restore of a db's data doesnt also restore procs and functions and vice versa.
View 7 Replies
View Related
Jan 10, 2008
Server consolidation is the word of the day here. One of the elements is to use, when applicable, virtual machines in our devstageprod environment. Our sql servers (with local storage) are well utilized and run fine. I don't want to move the entire server (sql 2005 engine + data) into a VM as I think performance will be bad. But, per my question, if only the sql engine is running in a VM while the data is stored on our SAN, I think we may achieve acceptable performance.
Do you have any thought or experience with this mix of Vm and SAN from a sql perspective?
TIA,
Barkingdog
View 1 Replies
View Related
Nov 6, 2007
Hi all,
I have a table in xyz database and there is no column in table like creation_date or modified_date.
The problem is I want to delete records which has been added in the table before 1st jan 2007.
The size of table is 85 GB
Immediate help would be appriciable.
Regards,
Frozen
View 9 Replies
View Related
Jul 23, 2007
Hello,
I have downloaded he trial Edition of SQL2005 Enterprise Edition. The data base engine does not install. Since I have previously installed Visual Studio 2008 which has VS 2005 components I uninstalled the SQL 2005 (which only has the configuration tool.
I also uninstalled he SQL Express and Compact Editions. When I tried to install SQL 2005 Enterprise once again the Data Base Engine did not nstall. I do get a warning that IIS is running in 32 bit mode in the pre-setup list,(I am running W2K3 R2 x64). I do not know what tro do I am downloading the trial software again. I need to have the data base engine and management studio. I am baffled as to why it doesn't install the Dtat Base Engine. In my add and remove programs there is no instance of SQL installed. Can anyone help? Thank you in advance. Joe
View 1 Replies
View Related
Aug 1, 2015
Some how reason I don't able to pull the data from table and it's giving me following error..I was using just simple select statement
Msg 605, Level 21, State 3, Line 1'
Attempt to fetch logical page (3:10809) in database 9 failed. It belongs to allocation unit 72057616050421760 not to 72057613925351424.
View 4 Replies
View Related
Mar 11, 2007
What would be the best practice to prevent users who didn't create a record in sql from deleting? When a record is created I have the username who created the record in one of the fields. I was thinking maybe a query?
Thank you in advance.
View 8 Replies
View Related
Jun 4, 1999
It is an option to set deletion without getting logged since I have problem to delete two years historical data and would like to keep this year data on my 80MB rows. Actually I create a new table to get copy one-year data and I truncated the old table. I am wondering if there is other better way to do this task.
TIA,
Stella Liu
View 2 Replies
View Related
Mar 19, 2007
Hello there,
We are currently setting up out production server to the following requirements:
1. Every month, delete records that haven't been changed in the last 90 days.
2. Replicate insert statements to a backup database which will keep track of all data, and act as an archive/data warehouse.
The first step is easy, as it is just a script that checks the date of the last change on each row. However, the second step is a bit more tricky. We tried setting up replication between two test databases, but we ran into the following problem: Whenever old data has been deleted in the production database, the replication agent deletes it in the data warehouse database too.
Is it possible to override or disable this, so data is only inserted/updated, and not deleted? No applications using the database deletes records, so database integrity should not be a problem.
Thanks for your time,
Ulrik Rasmussen
View 2 Replies
View Related
Apr 15, 2008
While performing import actions I had a system freeze, when the system returned the sessions had been closed and the database had vanished, with the help of support we recovered the database only to find that the original project ID had a suffix attached ( Original 40/0110, New 40/0110-1 ), when I try to return it to it's original numbering convention it says it has to be a unique number which suggests to me it is not deleted but hiding in the background, can the original be recovered or is it possible to renumber the recovered database, I have searched the whole of the databases and the original is nowhere to be seen.
View 1 Replies
View Related
Jun 4, 2008
Is there an option to find out the deleted DBs on a server?
------------------------
I think, therefore I am - Rene Descartes
View 14 Replies
View Related
Oct 12, 2013
table1 has a PK_tbl1 which matches FK_tbl1 in table2 and the relationship is one to one. Like this:
table1 has columns of UnitId, Code ...
table2 has columns of ItemID, UnitId ...
So if I need remove an item from table1 I must remove the matched one in table2 first.
delete from table2 where UnitId = xxx
delete from table1 where UnitId = xxx
Now I need create a trigger on table1 for deletion:
CREATE Trigger [dbo].[Table1_Delete]
ON [dbo].[Table1]
FOR DELETE
As
[code]....
View 2 Replies
View Related
Nov 22, 2006
Hi
I want to try and protect myself from my own stupidity. I have a number of sql databases, but one is LIVE. It is easy to drop tables but I want to set something (e.g. a password) which will help prevent me from dropping tables on the live database.
Any help/direction here would be appreciated.
View 8 Replies
View Related
Jul 23, 2005
Hi Everyone,I have a table in which their is record which is exactly same.I want to delete all the duplicate keeping ony 1 record in a table.ExampleTable AEmpid currentmonth PreviousmonthSupplimentarydays basic158 2001-11-25 00:00:00.000 2001-10-01 00:00:00.000 2.004701.00158 2001-11-25 00:00:00.000 2001-10-01 00:00:00.000 2.004701.00158 2001-11-25 00:00:00.000 2001-10-01 00:00:00.000 2.004701.00I want to delete 2 rows of above table.How can I achieve that.Any suggestion how can i do that.Thank you in advanceRichard
View 2 Replies
View Related
May 29, 2008
Ok, so I have an issue, was wondering if anybody else has any suggestions.
I have a table that is pretty large, in all regards. It is a "message" table that holds text messages that users send to each other.
1. Has some data fields, integers, dates, some bit columns, a message subject field (varchar(250)), and a message body field (field type = text)
2. Table contains about 70 million records
3. Table has 6 indexes associated to it
4. Table has 2 views associated to it.
5. Table has 8 foreign keys associated to it.
I need to delete, oh, about 90,000 records out of this 70 million record table. I am able to disable the foreign keys to this table for deletion, but that does not seem to mitigate the problem. I think the issue lies with having to update the indexes as well as the views.
When I execute the select statement to retrieve the records I need to delete, it executes pretty quickly, no problems there that I can see.
The issue comes when I try to delete the records, it takes way too long, and we know it. We let it run for an hour and it didn't really get anywhere. This is in a server environment, some pretty decent hardware, 8gig memory, fast SCSI drives, 8 core processors, i don't know the exact specifics, but they're not bad.
Here's a DBCC SHOWCONTIG on our table
DBCC SHOWCONTIG scanning 'message' table...
Table: 'message' (1448040590); index ID: 1, database ID: 13
TABLE level scan performed.
- Pages Scanned................................: 51602
- Extents Scanned..............................: 6486
- Extent Switches..............................: 6948
- Avg. Pages per Extent........................: 8.0
- Scan Density [Best Count:Actual Count].......: 92.83% [6451:6949]
- Logical Scan Fragmentation ..................: 0.54%
- Extent Scan Fragmentation ...................: 0.93%
- Avg. Bytes Free per Page.....................: 93.5
- Avg. Page Density (full).....................: 98.85%
DBCC execution completed. If DBCC printed error messages, contact your system administrator.
This is from our dev environment which is but a portion of our production db- but I presume our production environment will have similar percentages (not necessarily the pages scanned)
Any suggestions on how to delete records efficiently?
View 4 Replies
View Related
Feb 7, 2008
Hello,
I want to delete a 0KB file on one of the disks in my server. Do any of you have any idea how to do it??
Thanks,
Narayan
View 11 Replies
View Related
Aug 15, 2006
Im using SQL enterprise manager v8, a few days ago I got a report that a user account was deleted. I was wondering what logs would point this out. I've been through the event review and i am not seeing any usefull info.
View 1 Replies
View Related
Oct 8, 2015
how to generate null row two different date in data in sql ,,for example as below
name age DOB
ram 20 04/05/1988
kumar 30 04/05/1988
NULL NULL NULL
jonh 25 05/06/1988
View 7 Replies
View Related
Nov 13, 2015
I looking for a way of measuring how many MB of outbound SQL data is being transferred during the course of a day from an OLTP instance. Data is pulled from this server by a DW in the same domain and adhoc via a linked server. I'm looking at perfmon but nit sure if this is the correct tool and if so which counters to use. I'm looking for the total MB/GB over the period not the MB per sec.
View 2 Replies
View Related
May 12, 2015
I have 5 TB of data in production and my development team requested to restore only last month data(<=500 MB ) in staging server and last 2 months data in pre production.
View 3 Replies
View Related
Sep 26, 2015
On one of our SQL Server 2008R2 instances the MSDB log file (MSDBLog.ldf) has grown to 300GB+. The data (.mdf) file is only 3GB.
Neither DBCC Shrinkfile(MSDBLog) nor an interactive "Tasks / Shrink / ..."
I've already deleted much of the historyThe MSDB database is in "Simple" recovery modeI've done a full backup (in case the log was "waiting" for a backup)
I hesitate to do things (such as as Detach / Attach) with MSDB that I might do with a user database.
View 7 Replies
View Related
May 19, 2015
In tweaking performance of tempdb by adding add'l data files I want to reset back to defaults and remove all add'l files I've created. I was not able to do it for most as they were in use, but by starting the server in single-user mode with all other sql services shut off, and using sqlcmd I was able to use the ALTER DATABASE tempdb REMOVE FILE <tempdev#> to remove the files... except for one.
I have also tried using the command:
ALTER DATABASE tempdb MODIFY FILE (NAME = tempdev#, FILENAME = '<new location');
Restarted SQL server, and tried the ALTER DATABASE ... REMOVE FILE again but am always denied with the message that the file can't be removed b/c it's still in use.
I also tried to shrink it with EMPTYFILE but that also fails with the message that a page is a work table page and can't be removed.
I really need to get tempdb back to just one data file but am unable to find a way to remove this last data file.
View 2 Replies
View Related
Jun 15, 2015
What are the optimal values for this parameters? How it depends from queries characteristics?I create an application that insert some data in database. It'll work on different servers with different load and performance. I want to prevent timeout exceptions.
View 4 Replies
View Related
Jul 14, 2015
what is the best practices to store Landset Data in SQL Server? volume of data should grow up to 100 TB
View 3 Replies
View Related
May 15, 2015
I have deleted some data from some table. I dont have any backups and the database in simple recovery Mode. How to recover that data ...
View 15 Replies
View Related
