Hi,
I have a corrupted table wich has some valuable data in it. I found out that there is only one raw is corrupted. How do I find out which row of the table is it?
Can any one Help me in this matter Please?
Thanks Very much.
Jay k
SQL Server 6.5.
Hi!
When I try to create PK, Clustered index on the column in the table I have got error message: 1105 Couldn't not allocate space for object table1......
But it is a big amount of free space in the database. And actually I can create any indexes, exsept clustered with no problem.
DBCC CHECKALLOCK for this table shows: extent not ih the segment.
Does it mean the table structure is corupted? What Can I do to resolve the problem?
Thank you,
Elena.
Team,
I am having a critical problem.
We a team of 10 members accessing a particular database with a common user name and password . Some one have deleted the data from a business critical table. Transaction log backup is done every half an hour. Considering backup is taken at 10AM and my data is lost at 10.26AM. How to recover the lost data?
Is it possible to recover the data from log file or any other way to achieve the data recovery?
Is is possible to trace the person who have done this job. (By IP address or any other way)?
Regards,
Venkatesan Prabu . J
I have several sites which refer to a table in an MS SQL data base on the server.
I'm looking for a good way to check that my tables don't get corrupted
over time. It seems that I can't create a duplicate by selecting the
individual table and going SaveAs..
Can someone point me to the fool proof method that everyone else already uses, please ?
David Morley
Edit: Some changes added
This is my procedure for "rescuing" data from a corrupted database. Obviously restoring from backup is a lot easier!
0) Set the damaged database to Read-Only. if you don't have a backup make one now.
1) Script the database
2a) Create a new, TEMP database - preferably on a different machine in case of hardware problems on the original machine
2b) Size the Data for the TEMP database same size as the original (to avoid dynamic extensions). Size the Log something large-ish!
3) Run the Script on the TEMP database. Do NOT create any FK etc. yet
4a) Attempt to transfer all tables:
-- Prepare script of: INSERT INTO ... SELECT * FROM ...
SET NOCOUNT ON
SELECT 'PRINT ''' + name + '''' + CHAR(13) + CHAR(10) + 'GO' + CHAR(13) + CHAR(10)
+ CASE WHEN C.id IS NULL
THEN ''
ELSE 'SET IDENTITY_INSERT dbo.[' + name + '] ON' + CHAR(13) + CHAR(10)
END
+ 'INSERT INTO MyTempDatabase.dbo.[' + name + ']' + CHAR(13) + CHAR(10)
+ 'SELECT * FROM dbo.[' + name + ']' + CHAR(13) + CHAR(10)
+ CASE WHEN C.id IS NULL
THEN ''
ELSE 'SET IDENTITY_INSERT dbo.[' + name + '] OFF' + CHAR(13) + CHAR(10)
END
+ 'GO'
FROMdbo.sysobjects AS O
LEFT OUTER JOIN
(
SELECT DISTINCT C.id
FROMdbo.syscolumns AS C
WHEREC.colstat = 1-- Identity column
) AS C
ON C.id = O.id
WHERE type = 'U'
AND name NOT IN ('dtproperties')
ORDER BY name
SET NOCOUNT OFF
this generates statements like this:
PRINT 'MyTable'
GO
SET IDENTITY_INSERT dbo.[MyTable] ON
INSERT INTO RESTORE_XFER_TEMP.dbo.[MyTable]
SELECT * FROM dbo.[MyTable]
SET IDENTITY_INSERT dbo.[MyTable] OFF
GO
4b) This will give some sort of error on the tables which cannot be copied, and they will need to be rescued by some other means.
5a) Each "broken" table needs to be rescued using an index. Ideally you will have a clustered index on the PK and that will be undamaged, so you can "rescue" all the PKs into a temp table:
-- Copy PK fields to a temporary table
-- DROP TABLE MyRestoreDatabase.dbo.TEMP_RESCUE_PK
-- TRUNCATE TABLE MyRestoreDatabase.dbo.MyBrokenTable
SELECT[ID]=IDENTITY(int, 1, 1),
[IsCopied]=CONVERT(tinyint, 0),
MyPK
INTOMyRestoreDatabase.dbo.TEMP_RESCUE_PK
FROMMyBrokenDatabase.dbo.MyBrokenTable
ORDER BY MyPK
5b) If that is successful you have a list of all the PKs, so can can try to copy data matching those PKs, in batches:
-- If OK then selectively copy data across
-- First Prep. a temp Batch table
-- DROP TABLE MyRestoreDatabase.dbo.TEMP_RESCUE_BATCH
SELECT TOP 1 [ID]=CONVERT(int, NULL), [IsCopied]=CONVERT(bit, 0), MyPK
INTOMyRestoreDatabase.dbo.TEMP_RESCUE_BATCH
FROMMyRestoreDatabase.dbo.TEMP_RESCUE_PK
GO
--
DECLARE@intStartint,
@intStopint,
@intBatchSizeint
-- NOTE: After the first run set these to any "gaps" in the table that you want to fill
SELECT
@intStart = 1,
@intBatchSize = 10000,
@intStop = (SELECT MAX([ID]) FROM MyRestoreDatabase.dbo.TEMP_RESCUE_PK)
SELECT@intStart = MIN([ID])
FROMMyRestoreDatabase.dbo.TEMP_RESCUE_PK
WHERE IsCopied = 0
AND [ID] >= @intStart
WHILE@intStart < @intStop
BEGIN
SET ROWCOUNT @intBatchSize
-- Isolate batch of Keys into separate table
TRUNCATE TABLE MyRestoreDatabase.dbo.TEMP_RESCUE_BATCH
INSERT INTO MyRestoreDatabase.dbo.TEMP_RESCUE_BATCH
SELECTT.*
FROMMyRestoreDatabase.dbo.TEMP_RESCUE_PK AS T
WHERE IsCopied = 0
AND [ID] >= @intStart
AND [ID] < @intStart + @intBatchSize
-- Attempt to copy matching records, for this batch
PRINT CONVERT(varchar(20), @intStart)
INSERT INTO MyRestoreDatabase.dbo.MyBrokenTable
SELECTS.*
FROMMyRestoreDatabase.dbo.TEMP_RESCUE_BATCH AS T
LEFT OUTER JOIN MyRestoreDatabase.dbo.MyBrokenTable AS D
ON D.MyPK = T.MyPK
-- This will try to get the data from the broken table, it may fail!
JOIN MyBrokenDatabase.dbo.MyBrokenTable AS S
ON S.MyPK = T.MyPK
WHERED.MyPK IS NULL-- Belt and braces so as not to copy existing rows
-- Flag the rows just "Copied"
UPDATEU
SETIsCopied = 1
FROMMyRestoreDatabase.dbo.TEMP_RESCUE_PK AS U
WHEREIsCopied = 0
AND [ID] >= @intStart
AND [ID] < @intStart + @intBatchSize
-- Loop round, until done
SELECT@intStart = @intStart + @intBatchSize
END
GO
SET ROWCOUNT 0-- Turn OFF!!
GO
5c) This will copy in batches of 10,000 [you can adjust @intbatchSize depending on table size] until it gets to a damaged part of the table, then it will abort.
Change the @intStart to the last ID number displayed, and reduce @intBatchSize (by an order of magnitude each time) until you have rescued as many records as possible in the first "part" of the table.
5d) Reset the batch size @intBatchSize to 10,000 [or whatever size is appropriate], and increase the @intStart repeatedly until you are past the damaged section - copying will start again, and will abort if there are further damaged sections
5e) Repeat that process until you have rescued as much of the data as is possible
6) Check what is left to be rescued
-- Check amount NOT done:
SELECTCOUNT(*), MIN([ID]), MAX([ID])
FROMMyRestoreDatabase.dbo.TEMP_RESCUE_PK
WHERE IsCopied = 0
--AND [ID] > 123456-- Optionally count items after a "gap"
--
-- Double check that IsCopied set correctly, and the number of records "lost"
SELECTCOUNT(*),
[IsCopied] = SUM(CONVERT(int, IsCopied)),
[IsCopied+Record] = SUM(CASE WHEN IsCopied = 1 AND C.MyPK IS NOT NULL THEN 1 ELSE 0 END),
[IsCopiedNoRecord] = SUM(CASE WHEN IsCopied = 1 AND C.MyPK IS NULL THEN 1 ELSE 0 END),
[IsNOTCopied] = SUM(CASE WHEN IsCopied = 0THEN 1 ELSE 0 END),
[IsNOTCopied+Record] = SUM(CASE WHEN IsCopied = 0 AND C.MyPK IS NOT NULL THEN 1 ELSE 0 END),
[IsNOTCopiedNoRecord] = SUM(CASE WHEN IsCopied = 0 AND C.MyPK IS NULL THEN 1 ELSE 0 END)
FROMMyRestoreDatabase.dbo.TEMP_RESCUE_PK AS T
LEFT OUTER JOIN MyRestoreDatabase.dbo.MyBrokenTable AS C
ON C.MyPK = T.MyPK
--
-- List of "Lost" records
SELECTMyPK
FROMMyRestoreDatabase.dbo.TEMP_RESCUE_PK
WHERE IsCopied = 0
ORDER BY [ID]
You will then have to "find" and rescue the lost records somewhere.
I have a further process using OPENQUERY() to rescue records to fill the gaps in the event that they are available on a remote system - a straight JOIN to get them is going to be far to slow on anything other than tiny tables!
7a) Create the FKs etc. Update the statistics, rebuild indexes, and possibly shrink the Log if it is unrealistically big
7b) Backup and Restore over the original database
7c) DBCC CHECKDB ('MyDatabaseName') WITH ALL_ERRORMSGS, NO_INFOMSGS
Good luck!
Kristen
Hi All,
I have just one corrupted record on a table: I copied everything else to another table but I can't delete or rename the old one!
Is restoring the whole DB my only way out there?
Any help or suggestion would be much appreciated!
Cheers
our sql server databases are on a window cluster server.how to correct this issue or why would this happen? FILESTREAM data container 'M:TessituraDB DataDocuments' is corrupted. Database cannot recover.
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Sunny
Hello,
I am facing an issue with a table in my database.
1) When I run a query Select * from MY_Table the query never completes. If I press cancel in Query Analyzer after 1 second or 2 minutes, it always shows the same 174 records. The total table size is 800 KB with 3148 rows .. according to TaskPad
2) No queries, even queries that would return only 1 record complete execution against that table
3) I am unable to rename the table, if I try to rename the table Enterprise Manager becomes unresponsive and has to be closed.
4) If I try to browse the rows through Enterprise manager by scrolling through the records, it allows me to go down through a number of rows and then Enterprise manager gives me a timeout expired error.
5) I ran a DBCC CheckDB command ran for 1 hr and 7 minutes. It says there are 0 allocation errors and 0 consistency errors in the database.
6) The other database tables seem to be OK and the Database is operational except for calls involving the 1 Table
7) I am unable to Drop the Table
8) DBCC CheckAlloc finds 0 allocation errors and 0 consistency errors.
9) DBCC CheckTable on MY_Table returns with: There are 3148 rows in 33 pages for object 'MY_Table' .. no errors are printed.
Can one of the SQL Gurus on this forum please recommend a course of action.
Thanks in advance.
When my colleague makes any change to a query containing a derived table, the word 'WITH' followed by a lot of graphical characters appears after the alias, rendering the query unusable. We have tried this with various existing and new, simple queries, all to no avail. We are editing the queries in Visual Studio 2003, and he does not get this effect when using Visual Studio 2005. I can edit the query in 2003 on my laptop with no ill effects.
Help!
Karen
We are facing a weird scenario in which the snapshot is getting corrupted after insertupdate few million records in to a table .
SQL Server 2012
windows server 2008 R2
service pack 1
64-bit OS
Hi Everyone,
when i am trying to attach a 'xxx.mdf' file it is showing message 'xxx.mdf' is not a primary database file.
Please suggest me what could be the reasons and what are the possible ways to recover my database.
I have lot of important data in the database.
Thanks and Regards,
Shashidhar
how can i attach my database without the ndf file, i still have the mdf and ldf. my ndf file contains only 2 tables which are not that very impt. unfortunately my ndf was corrupted and my backup files was deleted when the network admin formatted the harddisk where the backups were stored.. is it possible? kindly help..
View 5 Replies View RelatedHi,
I have a question on sqlserver 6.5 with sp5a.
I execute a query like the following
select * from eps_analysis_cm (INDEX = index2)
where ....
the query gets 32 rows.
If I use another index
select * from eps_analysis_cm (INDEX = index1)
where ....
the query gets 0 rows.
Are my indexes corrupted ?
Note: running DBCC CHECKDB I get no error messages
Thanks in advance
We have one database of 5 GB of which when we take the backup and restore in another location, it says "Device Activation Error. The Physical file name e:databaseike_log.ldf may be incorrect".
The database has more than one log file.
Now when we use another procedure to create new database and stop the sql, then replace the old mdf file and REBUILDLOG. (Ie dbcc rebuildlog(nike,1,0)). It says incorrect DBCC Statment.
Pl. suggest us what to do?
Hi, Folks !
What happens with all jobs after rebuilding master db if it got corrupted. Will they be working correctly ? If no, then why ?
Thanx in advance,
serg
Hi all,
Had a disk problem here, and all apps connected to our database hung. Nothing was responding, rebooted, and mssqlserver hangs on startup.
If i move the mdf and ldf files of the database in question to another folder, mssqlserver starts up ok, with the db marked as suspect.
It would seem the the mdf and ldf are corrupted.
I am restoring a backup from yesterday, but this will take hours.
Any suggestions trying to recover it as it sits?
Thanks in advance for any ideas.
Hi..!
Is it possible to recover data from corrupted log backup ?
Suppose we have 10 log files and 8th is corrupted then how can we recover database.
I am not facing such problem right now, but it's a question raised in my mind.
I would like to have your help, suggestions & comments. :rolleyes:
Thanks...
Hi Everyone,
When I am trying to restore the backup it is giving an error message "An internal consistency error occurred. Contact Technical Support for assistance".
Please suggest me on this issue.
Is there any way to restore the backup or recover the backup.
Thanks,
Shashidhar
I have a SQL 2000 database whose MDF is approx. 105 GB. Everything has been working fine for months until this past weekend when the database server dropped offline. I restarted the services and SQL server looks to have started up okay. However, trying to access it via Enterprise Manager causes EM to hang. Checking the Windows event log, there are a whole series of messages stating ...
3455 : Analysis of database 'ptportal' (7) is XX% complete (approximately 61 more seconds)
This 'analysis' ran for over 12 hours ... I have never seen this run before, much less this long. Now, there are a new series of messages stating ...
3450 : Recovery of database 'ptportal' (7) is XX% complete (approximately 56526 more seconds) (Phase 2 of 3).
This 'recovery' has been running for 9 hours now. Does anybody have any idea what has happened here or what is going on? My guess is that this database has been corrupted and SQL Server is trying to do a repair? Anybody know how long this usually takes and what the success liklihood would be?
Thanks
-- Jeff Chastain
this may well be the wrong place for my post, if so please move it.
I have a variety of boxes with SQL tools installed on them. For some reason last week several of them seem to have gone a bit squif.
Server 1. Enterprise manager fails to run, giving message MMC could not create the snap-in. QA runs fine.
Server 2. Load EM click on a database and try Tools --> QA it comes back with File Not Found. Add isqlw as an external tool and you can run that ok, but still File Not found on the QA tab.
I know its not data corruption, but I hope someone can give me a clue on this!
Cheers!
Hi ALL,
My sql server is not starting becasue master db got corrupted.
I have tried to rebuild the master db with rebuild utility.Now the process of rebuilding taken 6 hours but still the process of rebuild master is going on.
Can any body faced this problem why it is not rebuilding the simple master database.
Thanks you.
BPG
EDIT by tkizer: moved to Data Corruption Issues forum
Hi,
I have a database corrupted showing on the Object Explorer the name of the database and showing near (6.5). Deleted not accepted any other function not allow. Is there any way to take off from the Object Explorer?
Best regards
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hello,
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Hi:
I try to run VB2005 Sample101, "Using Datagridvies" with SQL Express,
Here is what I got !"
"One or more files do not match the primary file of the database. If you are attempting to attach a database, retry the operation with the correct files. if this
is an existing database, the file may be corrupted and should be restored from a
back up.
Cannot open use default database. Login failed.
Login failed for use 'XXXXXXXXXXXAdministrator"
Lof File 'C:Program FilesMicrosoft SQL ServerMSSQL.1DataAdventureWorks_Data_Log.idl' does not match the primary file. It may be from a different database or the log
may have been rebuilt previously."
Then I re attached the Database again. Still the Same problem.
I try other sample that used Northwin and Pubs (SQL2000 ) and attached to
SQLExpress, Well I suffered the SAME PROBLEM.
WHY, Please Help
Thanks
Simon
We need to know, how to reorganize or reindex on sql-ce?
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Thanks
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